Java Swing: JPanel click Button to change background color смотреть онлайн

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2023 05 26 01 06 55




import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;


/**
*
* JPanel
*/
public class panel {
static JFrame ff;
static JButton bb, bb1, bb2;
static JLabel ll;

public static void main(String[] args) {
ff = new JFrame("Example of JPanel");
ll = new JLabel("Panel Label");

bb = new JButton("First Button");
bb1 = new JButton("Second Button");
bb2 = new JButton("Third Button");

JPanel pp = new JPanel();
pp.setLayout(new BoxLayout(pp, BoxLayout.Y_AXIS));

pp.add(bb, BorderLayout.WEST);
pp.add(bb1, BorderLayout.EAST);
pp.add(bb2, BorderLayout.CENTER);

bb.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
pp.setBackground(Color.yellow);
}
});

bb1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
pp.setBackground(Color.GREEN);
}
});

bb2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
pp.setBackground(Color.orange);
}
});
pp.setBackground(Color.yellow);

ff.add(pp);
ff.setSize(400, 400);
ff.show();
}


}