자바 UI - Swing (RadioButton 응용)

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JRadioButton 버튼을 4개로 만들어서 만들기

 

 

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.SwingUtilities;

public class RadioButtonTest extends JFrame{
	private JPanel radioPanel;
	
	private JRadioButton rbCat1;
	private JRadioButton rbCat2;
	private JRadioButton rbCat3;
	private JRadioButton rbCat4;
	private JLabel lblPicture;
	
	public RadioButtonTest() {
		setTitle("RadioButtonTest");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.getContentPane().add(getRadioPanel(), BorderLayout.WEST);
		this.getContentPane().add(getLblPicture(), BorderLayout.CENTER);
		pack();
	}
	
	public JPanel getRadioPanel() {
		if(radioPanel == null) {
			radioPanel = new JPanel();
			radioPanel.setLayout(new GridLayout(4,1));
			radioPanel.add(getRbCat1());
			radioPanel.add(getRbCat2());
			radioPanel.add(getRbCat3());
			radioPanel.add(getRbCat4());
			
			ButtonGroup group = new ButtonGroup();
			group.add(getRbCat1());
			group.add(getRbCat2());
			group.add(getRbCat3());
			group.add(getRbCat4());
			
		}
		return radioPanel;
	}
	
	
	public JRadioButton getRbCat1() {
		if(rbCat1 == null) {
			rbCat1 = new JRadioButton();
			rbCat1.setText("Cat1");
			rbCat1.setSelected(true);
			rbCat1.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					getLblPicture().setIcon(new ImageIcon(getClass().getResource("Cat1.gif")));
				}
			});
		}
		return rbCat1;
	}
	
	public JRadioButton getRbCat2() {
		if(rbCat2 == null) {
			rbCat2 = new JRadioButton();
			rbCat2.setText("Cat2");
			rbCat2.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					getLblPicture().setIcon(new ImageIcon(getClass().getResource("Cat2.gif")));
				}
			});
		}
		return rbCat2;
	}
	
	public JRadioButton getRbCat3() {
		if(rbCat3 == null) {
			rbCat3 = new JRadioButton();
			rbCat3.setText("Cat3");
			rbCat3.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					getLblPicture().setIcon(new ImageIcon(getClass().getResource("Cat3.gif")));
				}
			});
		}
		return rbCat3;
	}
	
	public JRadioButton getRbCat4() {
		if(rbCat4 == null) {
			rbCat4 = new JRadioButton();
			rbCat4.setText("Cat4");
			rbCat4.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					getLblPicture().setIcon(new ImageIcon(getClass().getResource("Cat4.gif")));
				}
			});
		}
		return rbCat4;
	}
	
	
	
	public JLabel getLblPicture() {
		if(lblPicture == null) {
			lblPicture = new JLabel();
			lblPicture.setIcon(new ImageIcon(getClass().getResource("Cat1.gif")));
		}
		return lblPicture;
	}
	
		public static void main(String[] args) {
			SwingUtilities.invokeLater(new Runnable() {
			public void run() {
			RadioButtonTest jFrame = new RadioButtonTest();
			jFrame.setVisible(true);
			}
		});		
	}
}

 

- 실행 결과 -