25일 차 Radiobutton(라디오버튼)

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

class Radio extends JFrame implements ActionListener {

private JRadioButton small, medium, large;

private JLabel text, label;

private JPanel topPanel, sizePanel, resultPanel;

private ButtonGroup size;

public Radio() {

this.setTitle("라디오 버튼 테스트");

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

topPanel = new JPanel();

label = new JLabel("어떤 크기의 커피를 주문하시겠습니까");

topPanel.add(label);

sizePanel = new JPanel();

small = new JRadioButton("Small Size");

medium = new JRadioButton("Medium Size");

large = new JRadioButton("Large Size");

size = new ButtonGroup();

size.add(small);

size.add(medium);

size.add(large);

small.addActionListener(this);

medium.addActionListener(this);

large.addActionListener(this);

sizePanel.add(small);

sizePanel.add(medium);

sizePanel.add(large);

resultPanel = new JPanel();

text = new JLabel("크기가 선택되지 않았다");

text.setForeground(Color.RED);

resultPanel.add(text);

this.add(topPanel, BorderLayout.NORTH);

this.add(sizePanel, BorderLayout.CENTER);

this.add(resultPanel, BorderLayout.SOUTH);

this.pack();

this.setVisible(true);

}

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if (e.getSource() == small) {

text.setText("Small크기가 선택되었습니다");

} else if (e.getSource() == medium) {

text.setText("Medium크기가 선택되었습니다");

} else if (e.getSource() == large) {

text.setText("Large크기가 선택되었습니다");

}

}

public static void main(String[] args) {

new Radio();

}

}