2025 02 23

//import javax.swing.*;

//import java.awt.event.*;

//import java.awt.*;

//

//public class Main extends JFrame {

// private JRadioButton[] radio = new JRadioButton [3];

// private String[] text = {"사과", "배", "체리"};

// private ImageIcon[] image = {

// new ImageIcon("apple.png"),

// new ImageIcon("pear (1).png"),

// new ImageIcon("cherries (2).png")};

// private JLabel imageLabel = new JLabel();

//

// public Main() {

// setTitle("라디오버튼 Item Event 예제");

// setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// Container c = getContentPane();

// c.setLayout(new BorderLayout());

//

// JPanel radioPanel = new JPanel();

// radioPanel.setBackground(Color.GRAY);

//

// ButtonGroup g = new ButtonGroup();

// for(int i=0; i<radio.length; i++) {

// radio[i] = new JRadioButton(text[i]);

// g.add(radio[i]);

// radioPanel.add(radio[i]);

// radio[i].addItemListener(new MyItemListener());

// }

//

// radio[2].setSelected(true);

// c.add(radioPanel, BorderLayout.NORTH);

// c.add(imageLabel, BorderLayout.CENTER);

// imageLabel.setHorizontalAlignment(SwingConstants.CENTER);

//

// setSize(250,200);

// setVisible(true);

// }

//

// class MyItemListener implements ItemListener {

// public void itemStateChanged(ItemEvent e) {

//

// if(e.getStateChange() == ItemEvent.DESELECTED)

// return;

// if(radio[0].isSelected())

// imageLabel.setIcon(image[0]);

// else if(radio[1].isSelected())

// imageLabel.setIcon(image[1]);

// else

// imageLabel.setIcon(image[2]);

// }

// }

// public static void main(String[] args) {

// new Main();

// }

//}

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class Main extends JFrame {

private JRadioButton[] radio = new JRadioButton [2];

private String[] text = {"Red", "Blue"};

Container c;

public Main() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

c = getContentPane();

c.setLayout(new FlowLayout());

// radio[0] = new JRadioButton(text[0]);

// radio[1] = new JRadioButton(text[1]);

// c.add(radio[0]);

// c.add(radio[1]);

// radio[0].addItemListener(new MyItemListener());

// radio[1].addItemListener(new MyItemListener());

ButtonGroup g = new ButtonGroup();

for(int i=0; i<radio.length; i++) {

radio[i] = new JRadioButton(text[i]);

c.add(radio[i]);

g.add(radio[i]);

radio[i].addItemListener(new MyItemListener());

}

setSize(350,300);

setVisible(true);

}

class MyItemListener implements ItemListener {

public void itemStateChanged(ItemEvent e) {

c = getContentPane();

if(radio[0].isSelected())

c.setBackground(Color.RED);

else if(radio[1].isSelected())

c.setBackground(Color.BLUE);

}

}

public static void main(String[] args) {

new Main();

}

}