再次单击时，如何更改JButton的原始颜色？

Question

the code below is how i change my JButton color to magenta. what i wanted to do is when i click the same button again i want it to go back to its normal color. I've tried searching in google but i can't seem to find the right answer for this problem. if you guys have any suggestion please let me know. thank you.

    Object source = e.getSource();
    int s=0;

    if (source instanceof Component) {
        ((Component)source).setBackground(Color.magenta);
        s=0;

    }
    </i>

Answer 1

boolean switcher = false;
if (source instanceof Component) {
        if(switcher)((Component)source).setBackground(Color.OLDCOLOR);
        else ((Component)source).setBackground(Color.magenta);

        switcher = switcher?false:true;

    }

Answer 2

Just check what's color right now:

if (((Component)source).getBackground().equals(Color.magenta)){
    ((Component)source).setBackground(null);
} else {
    ((Component)source).setBackground(Color.magenta);
    s=0;
}

null returns JButton to default color

Answer 3

Why not implement your own JButton ?

public class MyButton extends JButton {

    private Color on;
    private Color off;
    private boolean isOn = false;

    public void setOnColor(Color on) {
        this.on = on;
    }

    public void setOffColor(Color off) {
        this.off = off;
    }

    public void switchColor() {
        if (this.isOn)
            super.setBackground(this.on);
        else
            super.setBackground(this.off);
        this.isOn = !this.isOn;
    }
} 

When initializing the button

MyButton b = new MyButton();
b.setOffColor(null);
b.setOnColor(Color.MAGENTA);

In the event you can then do

Object source = e.getSource();

if (source instanceof MyButton) {
    ((MyButton)source).switchColor();
}