Java make Button Enabled

Java make Button Enabled


After learning GUI creation through 8 steps, for more command over button event handling, apart this one, another two programs are given – Changing Button Label and Making Button Invisible.

In the following program, three buttons are created with labels Red, Green and Blue. When Red button is clicked, the Blue button is enabled and when Green button is clicked, the enabled button is disabled. That is, Blue button toggles between the states enable and disable.

Concept-wise program is simple, but emphasis should be given to event handling and methods (like setEnabled() and setForeground() etc.) available for Button and how to use them.

Example code on Java make Button Enabled

Java make Button Enabled

2 thoughts on “Java make Button Enabled

  1. Shiladitya Kundu

    Object obj = e.getSource();
    Button btn = (Button) obj;

    Why we can not write String str = e.getActionCommand() in this program?
    public void actionPerformed(ActionEvent e)
    {
    if(btn == redBut)
    blueBut.setEnabled(true); else if(btn == greenBut) blueBut.setEnabled(false); } –

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