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Suppose we have a bunch of buttons in a particular Container saying Red, Green, Blue as we illustrated earlier. Then a good action method would be
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public boolean action(Event evt, Object arg) {
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if( evt.target instanceof Button)
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changeColor((String) arg); // changeColor Supplied by the user processes color defined by text string used in defining buttons
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return true; // tell runtime that this event fully processed
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}
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void changeColor(String bname) { // A suitable user routine to be called by above action
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if( bname.equals("Red")) setBackground(Color.red);
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else if (bname.equals("Green")) setBackground(Color.green);
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else if (bname.equals("Blue")) setBackground(Color.blue);
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else setBackground(Color.pink); // our favorite color
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}
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