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45 lines
1.1 KiB
Java
45 lines
1.1 KiB
Java
package hello;
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import java.io.BufferedInputStream;
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.PrintStream;
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public class HelloWorld {
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public void println () {
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System.out.println("Hello World!");
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}
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private void testStackTrace () throws IOException {
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try {
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println();
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}
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catch (Exception ex) {
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printRelevantStackEntries(ex,getClass().getName());
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}
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}
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private static void printRelevantStackEntries (Exception ex, String className) throws IOException {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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PrintStream ps = new PrintStream(baos);
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ex.printStackTrace(ps);
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ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
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BufferedReader br = new BufferedReader(new InputStreamReader(bais));
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String entry;
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while ((entry = br.readLine()) != null) {
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if (entry.indexOf(className) != -1) {
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System.err.println(entry);
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}
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}
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}
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public static void main(String[] args) throws Exception {
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new HelloWorld().testStackTrace();
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}
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}
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