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carlos.lucasius@canada 1998-05-08:

The bug is easy to track down, given the following trace.
It comes from a bad test in Container.java:300 ->

if (index == -1 || index == ncomponents) {

must become:

if (index == -1 || index >= ncomponents) {


$ cat group.java
import java.awt.*;

public class group {

    public static void main(String [] args) {
        Container cont = new Container () { };
        Component comp = new Component () { };

        cont.add(comp);
        cont.add(comp,1);
    }
}
$ javac group.java
$ java group
java.lang.ArrayIndexOutOfBoundsException
        at java.awt.Container.addImpl(Container.java:303)
        at java.awt.Container.add(Container.java:204)
        at group.main(group.java:10)
$