1 files changed, 8 insertions, 0 deletions
diff --git a/src/main/javassist/compiler/ast/Pair.java b/src/main/javassist/compiler/ast/Pair.java
index b050dd28..840c1145 100644
--- a/src/main/javassist/compiler/ast/Pair.java
+++ b/src/main/javassist/compiler/ast/Pair.java
@@ -23,6 +23,8 @@ import javassist.compiler.CompileError;
  * overriding abstract methods in ASTree.
  */
 public class Pair extends ASTree {
+    /** default serialVersionUID */
+    private static final long serialVersionUID = 1L;
     protected ASTree left, right;
 
     public Pair(ASTree _left, ASTree _right) {
@@ -30,8 +32,10 @@ public class Pair extends ASTree {
         right = _right;
     }
 
+    @Override
     public void accept(Visitor v) throws CompileError { v.atPair(this); }
 
+    @Override
     public String toString() {
         StringBuffer sbuf = new StringBuffer();
         sbuf.append("(<Pair> ");
@@ -42,11 +46,15 @@ public class Pair extends ASTree {
         return sbuf.toString();
     }
 
+    @Override
     public ASTree getLeft() { return left; }
 
+    @Override
     public ASTree getRight() { return right; }
 
+    @Override
     public void setLeft(ASTree _left) { left = _left; }
 
+    @Override
     public void setRight(ASTree _right) { right = _right; }
 }