fix lgtm alerts in examples

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1842707 13f79535-47bb-0310-9956-ffa450edef68

10 files changed, 144 insertions, 108 deletions

diff --git a/src/examples/src/org/apache/poi/ss/examples/ConditionalFormats.java b/src/examples/src/org/apache/poi/ss/examples/ConditionalFormats.java
index 17ce8dd403..dc6e6a54e6 100644
--- a/src/examples/src/org/apache/poi/ss/examples/ConditionalFormats.java
+++ b/src/examples/src/org/apache/poi/ss/examples/ConditionalFormats.java
@@ -53,7 +53,7 @@ import org.apache.poi.xssf.usermodel.XSSFWorkbook;
  * Excel Conditional Formatting -- Examples
  *
  * <p>
- *   Partly based on the code snippets from 
+ *   Partly based on the code snippets from
  *   http://www.contextures.com/xlcondformat03.html
  * </p>
  */
@@ -89,7 +89,7 @@ public class ConditionalFormats {
 
         // print overlapping rule results
         evaluateRules(wb, "Overlapping");
-        
+
         // Write the output to a file
         String file = "cf-poi.xls";
         if(wb instanceof XSSFWorkbook) {
@@ -178,11 +178,11 @@ public class ConditionalFormats {
 
         sheet.getRow(2).createCell(4).setCellValue("<== Condition 1: Formula Is =$B2>75   (Blue Fill)");
     }
-    
+
     /**
      * Multiple conditional formatting rules can apply to
      *  one cell, some combining, some beating others.
-     * Done in order of the rules added to the 
+     * Done in order of the rules added to the
      *  SheetConditionalFormatting object
      */
     static void overlapping(Sheet sheet) {
@@ -210,39 +210,39 @@ public class ConditionalFormats {
         }
         sheet.autoSizeColumn(0);
         sheet.autoSizeColumn(1);
-        
+
         sheet.getRow(1).createCell(3).setCellValue("Even rows are blue");
         sheet.getRow(2).createCell(3).setCellValue("Multiples of 3 have a grey background");
         sheet.getRow(4).createCell(3).setCellValue("Multiples of 5 are bold");
         sheet.getRow(9).createCell(3).setCellValue("Multiples of 10 are red (beats even)");
-        
+
         SheetConditionalFormatting sheetCF = sheet.getSheetConditionalFormatting();
-        
+
         // Condition 1: Row divides by 10, red (will beat #1)
-        ConditionalFormattingRule rule1 = 
+        ConditionalFormattingRule rule1 =
                 sheetCF.createConditionalFormattingRule("MOD(ROW(),10)=0");
         FontFormatting font1 = rule1.createFontFormatting();
         font1.setFontColorIndex(IndexedColors.RED.index);
-        
+
         // Condition 2: Row is even, blue
-        ConditionalFormattingRule rule2 = 
+        ConditionalFormattingRule rule2 =
                 sheetCF.createConditionalFormattingRule("MOD(ROW(),2)=0");
         FontFormatting font2 = rule2.createFontFormatting();
         font2.setFontColorIndex(IndexedColors.BLUE.index);
-        
+
         // Condition 3: Row divides by 5, bold
-        ConditionalFormattingRule rule3 = 
+        ConditionalFormattingRule rule3 =
                 sheetCF.createConditionalFormattingRule("MOD(ROW(),5)=0");
         FontFormatting font3 = rule3.createFontFormatting();
         font3.setFontStyle(false, true);
-        
+
         // Condition 4: Row divides by 3, grey background
-        ConditionalFormattingRule rule4 = 
+        ConditionalFormattingRule rule4 =
                 sheetCF.createConditionalFormattingRule("MOD(ROW(),3)=0");
         PatternFormatting fill4 = rule4.createPatternFormatting();
         fill4.setFillBackgroundColor(IndexedColors.GREY_25_PERCENT.index);
         fill4.setFillPattern(PatternFormatting.SOLID_FOREGROUND);
-        
+
         // Apply
         CellRangeAddress[] regions = {
                 CellRangeAddress.valueOf("A1:F41")
@@ -441,7 +441,7 @@ public class ConditionalFormats {
     }
 
     /**
-     * You can use Excel conditional formatting to shade bands of rows on the worksheet. 
+     * You can use Excel conditional formatting to shade bands of rows on the worksheet.
      * In this example, 3 rows are shaded light grey, and 3 are left with no shading.
      * In the MOD function, the total number of rows in the set of banded rows (6) is entered.
      */
@@ -462,7 +462,7 @@ public class ConditionalFormats {
         sheet.createRow(0).createCell(1).setCellValue("Shade Bands of Rows");
         sheet.createRow(1).createCell(1).setCellValue("Condition: Formula Is  =MOD(ROW(),6)<2   (Light Grey Fill)");
     }
-    
+
     /**
      * Icon Sets / Multi-States allow you to have icons shown which vary
      *  based on the values, eg Red traffic light / Yellow traffic light /
@@ -487,7 +487,7 @@ public class ConditionalFormats {
         r.createCell(3).setCellValue(10);
 
         SheetConditionalFormatting sheetCF = sheet.getSheetConditionalFormatting();
-        
+
         CellRangeAddress[] regions = { CellRangeAddress.valueOf("B1:B4") };
         ConditionalFormattingRule rule1 =
                 sheetCF.createConditionalFormattingRule(IconSet.GYR_3_TRAFFIC_LIGHTS);
@@ -497,7 +497,7 @@ public class ConditionalFormats {
         im1.getThresholds()[1].setValue(33d);
         im1.getThresholds()[2].setRangeType(RangeType.MAX);
         sheetCF.addConditionalFormatting(regions, rule1);
-        
+
         regions = new CellRangeAddress[] { CellRangeAddress.valueOf("C1:C4") };
         ConditionalFormattingRule rule2 =
                 sheetCF.createConditionalFormattingRule(IconSet.GYR_3_FLAGS);
@@ -509,7 +509,7 @@ public class ConditionalFormats {
         im2.getThresholds()[2].setRangeType(RangeType.PERCENT);
         im2.getThresholds()[2].setValue(67d);
         sheetCF.addConditionalFormatting(regions, rule2);
-        
+
         regions = new CellRangeAddress[] { CellRangeAddress.valueOf("D1:D4") };
         ConditionalFormattingRule rule3 =
                 sheetCF.createConditionalFormattingRule(IconSet.GYR_3_SYMBOLS_CIRCLE);
@@ -522,7 +522,7 @@ public class ConditionalFormats {
         im3.getThresholds()[2].setValue(7d);
         sheetCF.addConditionalFormatting(regions, rule3);
     }
-    
+
     /**
      * Color Scales / Colour Scales / Colour Gradients allow you shade the
      *  background colour of the cell based on the values, eg from Red to
@@ -533,12 +533,12 @@ public class ConditionalFormats {
         Row r = sheet.createRow(1);
         r.createCell(0).setCellValue("Red-Yellow-Green");
         for (int i=1; i<=7; i++) {
-            r.createCell(i).setCellValue((i-1)*5);
+            r.createCell(i).setCellValue((i-1)*5.0);
         }
         r = sheet.createRow(2);
         r.createCell(0).setCellValue("Red-White-Blue");
         for (int i=1; i<=9; i++) {
-            r.createCell(i).setCellValue((i-1)*5);
+            r.createCell(i).setCellValue((i-1)*5.0);
         }
         r = sheet.createRow(3);
         r.createCell(0).setCellValue("Blue-Green");
@@ -546,9 +546,9 @@ public class ConditionalFormats {
             r.createCell(i).setCellValue((i-1));
         }
         sheet.setColumnWidth(0, 5000);
-        
+
         SheetConditionalFormatting sheetCF = sheet.getSheetConditionalFormatting();
-        
+
         CellRangeAddress[] regions = { CellRangeAddress.valueOf("B2:H2") };
         ConditionalFormattingRule rule1 =
                 sheetCF.createConditionalFormattingColorScaleRule();
@@ -561,7 +561,7 @@ public class ConditionalFormats {
         ((ExtendedColor)cs1.getColors()[1]).setARGBHex("FFFFEB84");
         ((ExtendedColor)cs1.getColors()[2]).setARGBHex("FF63BE7B");
         sheetCF.addConditionalFormatting(regions, rule1);
-        
+
         regions = new CellRangeAddress[] { CellRangeAddress.valueOf("B3:J3") };
         ConditionalFormattingRule rule2 =
                 sheetCF.createConditionalFormattingColorScaleRule();
@@ -574,7 +574,7 @@ public class ConditionalFormats {
         ((ExtendedColor)cs2.getColors()[1]).setARGBHex("FFFCFCFF");
         ((ExtendedColor)cs2.getColors()[2]).setARGBHex("FF5A8AC6");
         sheetCF.addConditionalFormatting(regions, rule2);
-        
+
         regions = new CellRangeAddress[] { CellRangeAddress.valueOf("B4:Q4") };
         ConditionalFormattingRule rule3=
                 sheetCF.createConditionalFormattingColorScaleRule();
@@ -586,7 +586,7 @@ public class ConditionalFormats {
         ((ExtendedColor)cs3.getColors()[1]).setARGBHex("FF63BE7B");
         sheetCF.addConditionalFormatting(regions, rule3);
     }
-    
+
     /**
      * DataBars / Data-Bars allow you to have bars shown vary
      *  based on the values, from full to empty
@@ -623,7 +623,7 @@ public class ConditionalFormats {
         sheet.setColumnWidth(3, 5000);
 
         SheetConditionalFormatting sheetCF = sheet.getSheetConditionalFormatting();
-        
+
         ExtendedColor color = sheet.getWorkbook().getCreationHelper().createExtendedColor();
         color.setARGBHex("FF63BE7B");
         CellRangeAddress[] regions = { CellRangeAddress.valueOf("B2:B7") };
@@ -632,7 +632,7 @@ public class ConditionalFormats {
         db1.getMinThreshold().setRangeType(RangeType.MIN);
         db1.getMaxThreshold().setRangeType(RangeType.MAX);
         sheetCF.addConditionalFormatting(regions, rule1);
-        
+
         color = sheet.getWorkbook().getCreationHelper().createExtendedColor();
         color.setARGBHex("FF5A8AC6");
         regions = new CellRangeAddress[] { CellRangeAddress.valueOf("C2:C7") };
@@ -641,7 +641,7 @@ public class ConditionalFormats {
         db2.getMinThreshold().setRangeType(RangeType.MIN);
         db2.getMaxThreshold().setRangeType(RangeType.MAX);
         sheetCF.addConditionalFormatting(regions, rule2);
-        
+
         color = sheet.getWorkbook().getCreationHelper().createExtendedColor();
         color.setARGBHex("FFF8696B");
         regions = new CellRangeAddress[] { CellRangeAddress.valueOf("D2:D7") };
@@ -651,7 +651,7 @@ public class ConditionalFormats {
         db3.getMaxThreshold().setRangeType(RangeType.MAX);
         sheetCF.addConditionalFormatting(regions, rule3);
     }
-    
+
     /**
      * Print out a summary of the conditional formatting rules applied to cells on the given sheet.
      * Only cells with a matching rule are printed, and for those, all matching rules are sumarized.
@@ -661,15 +661,19 @@ public class ConditionalFormats {
         final ConditionalFormattingEvaluator cfEval = new ConditionalFormattingEvaluator(wb, wbEvalProv);
         // if cell values have changed, clear cached format results
         cfEval.clearAllCachedValues();
-        
+
         final Sheet sheet = wb.getSheet(sheetName);
         for (Row r : sheet) {
             for (Cell c : r) {
                 final List<EvaluationConditionalFormatRule> rules = cfEval.getConditionalFormattingForCell(c);
                 // check rules list for null, although current implementation will return an empty list, not null, then do what you want with results
-                if (rules == null || rules.isEmpty()) continue;
+                if (rules == null || rules.isEmpty()) {
+                    continue;
+                }
                 final CellReference ref = ConditionalFormattingEvaluator.getRef(c);
-                if (rules.isEmpty()) continue;
+                if (rules.isEmpty()) {
+                    continue;
+                }
 
                 System.out.println("\n"
                   + ref.formatAsString()
@@ -682,7 +686,7 @@ public class ConditionalFormats {
                     b.append("\tRule ")
                      .append(rule.getFormattingIndex())
                      .append(": ");
-                    
+
                     // check for color scale
                     if (cf.getColorScaleFormatting() != null) {
                         b.append("\n\t\tcolor scale (caller must calculate bucket)");
@@ -709,13 +713,19 @@ public class ConditionalFormats {
                         b.append("\n\t\tfont format ")
                          .append("color index ")
                          .append(ff.getFontColorIndex());
-                        if (ff.isBold()) b.append(" bold");
-                        if (ff.isItalic()) b.append(" italic");
-                        if (ff.isStruckout()) b.append(" strikeout");
+                        if (ff.isBold()) {
+                            b.append(" bold");
+                        }
+                        if (ff.isItalic()) {
+                            b.append(" italic");
+                        }
+                        if (ff.isStruckout()) {
+                            b.append(" strikeout");
+                        }
                         b.append(" underline index ")
                          .append(ff.getUnderlineType());
                     }
-                    
+
                     System.out.println(b);
                 }
             }
diff --git a/src/examples/src/org/apache/poi/ss/examples/html/ToHtml.java b/src/examples/src/org/apache/poi/ss/examples/html/ToHtml.java
index c8d5ed1288..622a38b80f 100644
--- a/src/examples/src/org/apache/poi/ss/examples/html/ToHtml.java
+++ b/src/examples/src/org/apache/poi/ss/examples/html/ToHtml.java
@@ -33,7 +33,6 @@ import java.util.Set;
 import java.util.TreeMap;
 
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
-import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
 import org.apache.poi.ss.format.CellFormat;
 import org.apache.poi.ss.format.CellFormatResult;
 import org.apache.poi.ss.usermodel.BorderStyle;
@@ -96,10 +95,10 @@ public class ToHtml {
             BorderStyle.SLANTED_DASH_DOT, "dashed 2pt",
             BorderStyle.THICK, "solid 3pt",
             BorderStyle.THIN, "dashed 1pt");
-    
+
     private static final int IDX_TABLE_WIDTH = -2;
     private static final int IDX_HEADER_COL_WIDTH = -1;
-    
+
 
     @SuppressWarnings({"unchecked"})
     private static <K, V> Map<K, V> mapFor(Object... mapping) {
@@ -189,9 +188,14 @@ public class ToHtml {
             return;
         }
 
-        ToHtml toHtml = create(args[0], new PrintWriter(new FileWriter(args[1])));
-        toHtml.setCompleteHTML(true);
-        toHtml.printPage();
+        try (
+                FileWriter fw = new FileWriter(args[1]);
+                PrintWriter pw = new PrintWriter(fw)
+            ) {
+            ToHtml toHtml = create(args[0], pw);
+            toHtml.setCompleteHTML(true);
+            toHtml.printPage();
+        }
     }
 
     public void setCompleteHTML(boolean completeHTML) {
@@ -350,32 +354,32 @@ public class ToHtml {
     public void printSheet(Sheet sheet) {
         ensureOut();
         Map<Integer, Integer> widths = computeWidths(sheet);
-        int tableWidth = widths.get(IDX_TABLE_WIDTH); 
+        int tableWidth = widths.get(IDX_TABLE_WIDTH);
         out.format("<table class=%s style=\"width:%dpx;\">%n", DEFAULTS_CLASS, tableWidth);
         printCols(widths);
         printSheetContent(sheet);
         out.format("</table>%n");
     }
-    
+
     /**
-     * computes the column widths, defined by the sheet. 
-     * 
+     * computes the column widths, defined by the sheet.
+     *
      * @param sheet The sheet for which to compute widths
      * @return Map with key: column index; value: column width in pixels
-     *     <br>special keys: 
+     *     <br>special keys:
      *     <br>{@link #IDX_HEADER_COL_WIDTH} - width of the header column
-     *     <br>{@link #IDX_TABLE_WIDTH} - width of the entire table 
+     *     <br>{@link #IDX_TABLE_WIDTH} - width of the entire table
      */
     private Map<Integer, Integer> computeWidths(Sheet sheet) {
         Map<Integer, Integer> ret = new TreeMap<>();
         int tableWidth = 0;
 
         ensureColumnBounds(sheet);
-        
+
         // compute width of the header column
         int lastRowNum = sheet.getLastRowNum();
         int headerCharCount = String.valueOf(lastRowNum).length();
-        int headerColWidth = widthToPixels((headerCharCount + 1) * 256);
+        int headerColWidth = widthToPixels((headerCharCount + 1) * 256.0);
         ret.put(IDX_HEADER_COL_WIDTH, headerColWidth);
         tableWidth += headerColWidth;
 
@@ -384,11 +388,11 @@ public class ToHtml {
             ret.put(i, colWidth);
             tableWidth += colWidth;
         }
-        
+
         ret.put(IDX_TABLE_WIDTH, tableWidth);
         return ret ;
     }
-    
+
     /**
      * Probably platform-specific, but appears to be a close approximation on some systems
      * @param widthUnits POI's native width unit (twips)
diff --git a/src/examples/src/org/apache/poi/xssf/usermodel/examples/BarChart.java b/src/examples/src/org/apache/poi/xssf/usermodel/examples/BarChart.java
index d9090d7dd1..5e695decf2 100644
--- a/src/examples/src/org/apache/poi/xssf/usermodel/examples/BarChart.java
+++ b/src/examples/src/org/apache/poi/xssf/usermodel/examples/BarChart.java
@@ -63,7 +63,7 @@ public class BarChart {
                 row = sheet.createRow((short) rowIndex);
                 for (int colIndex = 0; colIndex < NUM_OF_COLUMNS; colIndex++) {
                     cell = row.createCell((short) colIndex);
-                    cell.setCellValue(colIndex * (rowIndex + 1));
+                    cell.setCellValue(colIndex * (rowIndex + 1.0));
                 }
             }
 
diff --git a/src/examples/src/org/apache/poi/xssf/usermodel/examples/BigGridDemo.java b/src/examples/src/org/apache/poi/xssf/usermodel/examples/BigGridDemo.java
index 8803175997..65d0686a8c 100644
--- a/src/examples/src/org/apache/poi/xssf/usermodel/examples/BigGridDemo.java
+++ b/src/examples/src/org/apache/poi/xssf/usermodel/examples/BigGridDemo.java
@@ -58,18 +58,18 @@ import org.apache.poi.xssf.usermodel.XSSFWorkbook;
  * <p>
  * If you really want to use this approach, which is also the one that SXSSF
  * does for you, it works as follows:
- * 
+ *
  * 1. create a template workbook, create sheets and global objects such as cell styles, number formats, etc.
  * 2. create an application that streams data in a text file
  * 3. Substitute the sheet in the template with the generated data
  *
  * <p>
- *  Since 3.8 POI provides a low-memory footprint SXSSF API, which implements 
+ *  Since 3.8 POI provides a low-memory footprint SXSSF API, which implements
  *  ths "BigGridDemo" strategy. SXSSF is an API-compatible streaming extension
- *  of XSSF to be used when very large spreadsheets have to be produced, and 
- *  heap space is limited. SXSSF achieves its low memory footprint by limiting 
- *  access to the rows that are within a sliding window, while XSSF gives access 
- *  to all rows in the document. Older rows that are no longer in the window 
+ *  of XSSF to be used when very large spreadsheets have to be produced, and
+ *  heap space is limited. SXSSF achieves its low memory footprint by limiting
+ *  access to the rows that are within a sliding window, while XSSF gives access
+ *  to all rows in the document. Older rows that are no longer in the window
  *  become inaccessible, as they are written to the disk.
  * </p>
  * See <a "http://poi.apache.org/spreadsheet/how-to.html#sxssf">
@@ -79,7 +79,7 @@ public final class BigGridDemo {
     private static final String XML_ENCODING = "UTF-8";
 
     private BigGridDemo() {}
-    
+
     public static void main(String[] args) throws Exception {
 
         // Step 1. Create a template file. Setup sheets and workbook-level objects such as
@@ -99,7 +99,10 @@ public final class BigGridDemo {
 
             //Step 2. Generate XML file.
             File tmp = File.createTempFile("sheet", ".xml");
-            try (Writer fw = new OutputStreamWriter(new FileOutputStream(tmp), XML_ENCODING)) {
+            try (
+                    FileOutputStream stream = new FileOutputStream(tmp);
+                    Writer fw = new OutputStreamWriter(stream, XML_ENCODING)
+                ) {
                 generate(fw, styles);
             }
 
@@ -265,7 +268,9 @@ public final class BigGridDemo {
         public void createCell(int columnIndex, String value, int styleIndex) throws IOException {
             String ref = new CellReference(_rownum, columnIndex).formatAsString();
             _out.write("<c r=\""+ref+"\" t=\"inlineStr\"");
-            if(styleIndex != -1) _out.write(" s=\""+styleIndex+"\"");
+            if(styleIndex != -1) {
+                _out.write(" s=\""+styleIndex+"\"");
+            }
             _out.write(">");
             _out.write("<is><t>"+value+"</t></is>");
             _out.write("</c>");
@@ -278,7 +283,9 @@ public final class BigGridDemo {
         public void createCell(int columnIndex, double value, int styleIndex) throws IOException {
             String ref = new CellReference(_rownum, columnIndex).formatAsString();
             _out.write("<c r=\""+ref+"\" t=\"n\"");
-            if(styleIndex != -1) _out.write(" s=\""+styleIndex+"\"");
+            if(styleIndex != -1) {
+                _out.write(" s=\""+styleIndex+"\"");
+            }
             _out.write(">");
             _out.write("<v>"+value+"</v>");
             _out.write("</c>");
diff --git a/src/examples/src/org/apache/poi/xssf/usermodel/examples/CreateTable.java b/src/examples/src/org/apache/poi/xssf/usermodel/examples/CreateTable.java
index d1acce5f72..c2fc068afe 100644
--- a/src/examples/src/org/apache/poi/xssf/usermodel/examples/CreateTable.java
+++ b/src/examples/src/org/apache/poi/xssf/usermodel/examples/CreateTable.java
@@ -33,14 +33,18 @@ import org.apache.poi.xssf.usermodel.XSSFWorkbook;
  * Demonstrates how to create a simple table using Apache POI.
  */
 public class CreateTable {
-        
+
     public static void main(String[] args) throws IOException {
-        
+
         try (Workbook wb = new XSSFWorkbook()) {
             XSSFSheet sheet = (XSSFSheet) wb.createSheet();
 
+            // Set which area the table should be placed in
+            AreaReference reference = wb.getCreationHelper().createAreaReference(
+                    new CellReference(0, 0), new CellReference(2, 2));
+
             // Create
-            XSSFTable table = sheet.createTable();
+            XSSFTable table = sheet.createTable(reference);
             table.setName("Test");
             table.setDisplayName("Test_Table");
 
@@ -70,7 +74,7 @@ public class CreateTable {
                     if (i == 0) {
                         cell.setCellValue("Column" + (j + 1));
                     } else {
-                        cell.setCellValue((i + 1) * (j + 1));
+                        cell.setCellValue((i + 1.0) * (j + 1.0));
                     }
                 }
             }
@@ -79,11 +83,6 @@ public class CreateTable {
             table.createColumn("Column 2");
             table.createColumn("Column 3");
 
-            // Set which area the table should be placed in
-            AreaReference reference = wb.getCreationHelper().createAreaReference(
-                    new CellReference(0, 0), new CellReference(2, 2));
-            table.setCellReferences(reference);
-
             // Save
             try (FileOutputStream fileOut = new FileOutputStream("ooxml-table.xlsx")) {
                 wb.write(fileOut);
diff --git a/src/examples/src/org/apache/poi/xssf/usermodel/examples/IterateCells.java b/src/examples/src/org/apache/poi/xssf/usermodel/examples/IterateCells.java
index e8b310fb2b..0d30923852 100644
--- a/src/examples/src/org/apache/poi/xssf/usermodel/examples/IterateCells.java
+++ b/src/examples/src/org/apache/poi/xssf/usermodel/examples/IterateCells.java
@@ -32,7 +32,10 @@ import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 public class IterateCells {
 
     public static void main(String[] args) throws IOException {
-        try (Workbook wb = new XSSFWorkbook(new FileInputStream(args[0]))) {
+        try (
+                FileInputStream is = new FileInputStream(args[0]);
+                Workbook wb = new XSSFWorkbook(is)
+            ) {
             for (int i = 0; i < wb.getNumberOfSheets(); i++) {
                 Sheet sheet = wb.getSheetAt(i);
                 System.out.println(wb.getSheetName(i));
diff --git a/src/examples/src/org/apache/poi/xssf/usermodel/examples/LineChart.java b/src/examples/src/org/apache/poi/xssf/usermodel/examples/LineChart.java
index 9aff342bce..3a1e0e8580 100644
--- a/src/examples/src/org/apache/poi/xssf/usermodel/examples/LineChart.java
+++ b/src/examples/src/org/apache/poi/xssf/usermodel/examples/LineChart.java
@@ -57,26 +57,26 @@ public class LineChart {
                 row = sheet.createRow((short) rowIndex);
                 for (int colIndex = 0; colIndex < NUM_OF_COLUMNS; colIndex++) {
                     cell = row.createCell((short) colIndex);
-                    cell.setCellValue(colIndex * (rowIndex + 1));
+                    cell.setCellValue(colIndex * (rowIndex + 1.0));
                 }
             }
 
             XSSFDrawing drawing = sheet.createDrawingPatriarch();
             XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 5, 10, 15);
-    
+
             XSSFChart chart = drawing.createChart(anchor);
             XDDFChartLegend legend = chart.getOrAddLegend();
             legend.setPosition(LegendPosition.TOP_RIGHT);
-    
+
             // Use a category axis for the bottom axis.
             XDDFCategoryAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
             XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
             leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
-    
+
             XDDFDataSource<Double> xs = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(0, 0, 0, NUM_OF_COLUMNS - 1));
             XDDFNumericalDataSource<Double> ys1 = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 1, 0, NUM_OF_COLUMNS - 1));
             XDDFNumericalDataSource<Double> ys2 = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(2, 2, 0, NUM_OF_COLUMNS - 1));
-    
+
             XDDFChartData data = chart.createData(ChartTypes.LINE, bottomAxis, leftAxis);
             data.addSeries(xs, ys1);
             data.addSeries(xs, ys2);
diff --git a/src/examples/src/org/apache/poi/xssf/usermodel/examples/ScatterChart.java b/src/examples/src/org/apache/poi/xssf/usermodel/examples/ScatterChart.java
index 6ad9dbaeaa..9b96ee3123 100644
--- a/src/examples/src/org/apache/poi/xssf/usermodel/examples/ScatterChart.java
+++ b/src/examples/src/org/apache/poi/xssf/usermodel/examples/ScatterChart.java
@@ -59,28 +59,28 @@ public class ScatterChart {
                 row = sheet.createRow((short) rowIndex);
                 for (int colIndex = 0; colIndex < NUM_OF_COLUMNS; colIndex++) {
                     cell = row.createCell((short) colIndex);
-                    cell.setCellValue(colIndex * (rowIndex + 1));
+                    cell.setCellValue(colIndex * (rowIndex + 1.0));
                 }
             }
-        
+
             XSSFDrawing drawing = sheet.createDrawingPatriarch();
             XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 5, 10, 15);
-    
+
             XSSFChart chart = drawing.createChart(anchor);
             XDDFChartLegend legend = chart.getOrAddLegend();
             legend.setPosition(LegendPosition.TOP_RIGHT);
-    
+
             XDDFValueAxis bottomAxis = chart.createValueAxis(AxisPosition.BOTTOM);
             XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
             leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
-    
+
             XDDFDataSource<Double> xs = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(0, 0, 0, NUM_OF_COLUMNS - 1));
             XDDFNumericalDataSource<Double> ys1 = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 1, 0, NUM_OF_COLUMNS - 1));
             XDDFNumericalDataSource<Double> ys2 = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(2, 2, 0, NUM_OF_COLUMNS - 1));
-    
-    
+
+
             XDDFChartData data = chart.createData(ChartTypes.SCATTER, bottomAxis, leftAxis);
-    
+
             data.addSeries(xs, ys1);
             data.addSeries(xs, ys2);
             chart.plot(data);
diff --git a/src/examples/src/org/apache/poi/xwpf/usermodel/examples/SimpleDocument.java b/src/examples/src/org/apache/poi/xwpf/usermodel/examples/SimpleDocument.java
index 22ed4e6bf6..9de12c5aa4 100644
--- a/src/examples/src/org/apache/poi/xwpf/usermodel/examples/SimpleDocument.java
+++ b/src/examples/src/org/apache/poi/xwpf/usermodel/examples/SimpleDocument.java
@@ -111,16 +111,16 @@ public class SimpleDocument {
             r5.setTextPosition(-10);
             r5.setText("For in that sleep of death what dreams may come");
             r5.addCarriageReturn();
-            r5.setText("When we have shuffled off this mortal coil,"
-                    + "Must give us pause: there's the respect"
+            r5.setText("When we have shuffled off this mortal coil, "
+                    + "Must give us pause: there's the respect "
                     + "That makes calamity of so long life;");
             r5.addBreak();
-            r5.setText("For who would bear the whips and scorns of time,"
+            r5.setText("For who would bear the whips and scorns of time, "
                     + "The oppressor's wrong, the proud man's contumely,");
 
             r5.addBreak(BreakClear.ALL);
-            r5.setText("The pangs of despised love, the law's delay,"
-                    + "The insolence of office and the spurns" + ".......");
+            r5.setText("The pangs of despised love, the law's delay, "
+                    + "The insolence of office and the spurns " + ".......");
 
             try (FileOutputStream out = new FileOutputStream("simple.docx")) {
                 doc.write(out);
diff --git a/src/examples/src/org/apache/poi/xwpf/usermodel/examples/SimpleImages.java b/src/examples/src/org/apache/poi/xwpf/usermodel/examples/SimpleImages.java
index f00af9cde5..7b25f061b9 100644
--- a/src/examples/src/org/apache/poi/xwpf/usermodel/examples/SimpleImages.java
+++ b/src/examples/src/org/apache/poi/xwpf/usermodel/examples/SimpleImages.java
@@ -43,18 +43,29 @@ public class SimpleImages {
             for (String imgFile : args) {
                 int format;
 
-                if (imgFile.endsWith(".emf")) format = XWPFDocument.PICTURE_TYPE_EMF;
-                else if (imgFile.endsWith(".wmf")) format = XWPFDocument.PICTURE_TYPE_WMF;
-                else if (imgFile.endsWith(".pict")) format = XWPFDocument.PICTURE_TYPE_PICT;
-                else if (imgFile.endsWith(".jpeg") || imgFile.endsWith(".jpg")) format = XWPFDocument.PICTURE_TYPE_JPEG;
-                else if (imgFile.endsWith(".png")) format = XWPFDocument.PICTURE_TYPE_PNG;
-                else if (imgFile.endsWith(".dib")) format = XWPFDocument.PICTURE_TYPE_DIB;
-                else if (imgFile.endsWith(".gif")) format = XWPFDocument.PICTURE_TYPE_GIF;
-                else if (imgFile.endsWith(".tiff")) format = XWPFDocument.PICTURE_TYPE_TIFF;
-                else if (imgFile.endsWith(".eps")) format = XWPFDocument.PICTURE_TYPE_EPS;
-                else if (imgFile.endsWith(".bmp")) format = XWPFDocument.PICTURE_TYPE_BMP;
-                else if (imgFile.endsWith(".wpg")) format = XWPFDocument.PICTURE_TYPE_WPG;
-                else {
+                if (imgFile.endsWith(".emf")) {
+                    format = XWPFDocument.PICTURE_TYPE_EMF;
+                } else if (imgFile.endsWith(".wmf")) {
+                    format = XWPFDocument.PICTURE_TYPE_WMF;
+                } else if (imgFile.endsWith(".pict")) {
+                    format = XWPFDocument.PICTURE_TYPE_PICT;
+                } else if (imgFile.endsWith(".jpeg") || imgFile.endsWith(".jpg")) {
+                    format = XWPFDocument.PICTURE_TYPE_JPEG;
+                } else if (imgFile.endsWith(".png")) {
+                    format = XWPFDocument.PICTURE_TYPE_PNG;
+                } else if (imgFile.endsWith(".dib")) {
+                    format = XWPFDocument.PICTURE_TYPE_DIB;
+                } else if (imgFile.endsWith(".gif")) {
+                    format = XWPFDocument.PICTURE_TYPE_GIF;
+                } else if (imgFile.endsWith(".tiff")) {
+                    format = XWPFDocument.PICTURE_TYPE_TIFF;
+                } else if (imgFile.endsWith(".eps")) {
+                    format = XWPFDocument.PICTURE_TYPE_EPS;
+                } else if (imgFile.endsWith(".bmp")) {
+                    format = XWPFDocument.PICTURE_TYPE_BMP;
+                } else if (imgFile.endsWith(".wpg")) {
+                    format = XWPFDocument.PICTURE_TYPE_WPG;
+                } else {
                     System.err.println("Unsupported picture: " + imgFile +
                             ". Expected emf|wmf|pict|jpeg|png|dib|gif|tiff|eps|bmp|wpg");
                     continue;
@@ -62,7 +73,9 @@ public class SimpleImages {
 
                 r.setText(imgFile);
                 r.addBreak();
-                r.addPicture(new FileInputStream(imgFile), format, imgFile, Units.toEMU(200), Units.toEMU(200)); // 200x200 pixels
+                try (FileInputStream is = new FileInputStream(imgFile)) {
+                    r.addPicture(is, format, imgFile, Units.toEMU(200), Units.toEMU(200)); // 200x200 pixels
+                }
                 r.addBreak(BreakType.PAGE);
             }