Name: mgC56079 Date: 09/17/97



  The java.awt.MenuShortcut class defines 'public boolean equals(MenuShortcut)'
method instead of overriding 'public boolean Object.equals(Object)' method.

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--- Here is the test demonstrating the bug ---
 
import java.awt.MenuShortcut;
public class MS {
  public static void main(String[] args) {
    MenuShortcut ms=new MenuShortcut(0);
    MenuShortcut ms1=new MenuShortcut(0);
    Object ms1again=ms1;
    System.out.println(ms.equals(ms1)); //returns true
    System.out.println(ms.equals(ms1again)); //returns false, expecting true
  }
}
--- Here is the output of the test ---
%java MS
true
false
 
--- Here is more interesting example ---
 
import java.awt.MenuShortcut;
import java.util.Vector;
 
public class MS {
  public static void main(String[] args) {
    Vector v=new Vector();
    MenuShortcut ms=new MenuShortcut(0);
    v.addElement(ms);
    /*
     ....
     */
    MenuShortcut ms1=new MenuShortcut(0);
    System.out.println("ms1.equals(ms1):"+ms1.equals(ms1));
    System.out.println("equals returns true so expecting v.indexOf(ms1) to return 0 according to the JLS 21.11.27");
    System.out.println(v.indexOf(ms1));
    if (v.indexOf(ms1)==-1)
      System.out.println("MenuShortcut not found in vector");
  }
}
--- Here is the output of the test ---
% java MS
ms1.equals(ms1):true
equals returns true so expecting v.indexOf(ms1) to return 0 according to the JLS 21.11.27
-1
MenuShortcut not found in vector

###@###.### 1997-12-04