[JAVA] 체크박스, 라디오박스 컴포넌트 구현

체크박스

import java.awt.Container;
import java.awt.FlowLayout;

import javax.swing.ImageIcon;
import javax.swing.JCheckBox;
import javax.swing.JFrame;

public class JCheckBoxEx extends JFrame{
	JCheckBoxEx(){
		setTitle("JCheckBoxEx");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c = getContentPane();
		c.setLayout(new FlowLayout());
		
		ImageIcon cherryIcon = new ImageIcon("cherry.jpg");
		ImageIcon scherryIcon = new ImageIcon("selectedCherry.jpg");
		JCheckBox apple = new JCheckBox("사과");
		JCheckBox pear = new JCheckBox("배");
		JCheckBox cherry = new JCheckBox("체리",cherryIcon);
		cherry.setBorderPainted(true);
		cherry.setSelectedIcon(scherryIcon);
		
		c.add(apple); c.add(pear); c.add(cherry);
		
		setSize(300,300);
		setVisible(true);
	}
	
	public static void main(String[] args) {
		new JCheckBoxEx();
	}
}

아이템 이벤트(체크박스, 라디오버튼)

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class JCheckBoxEx extends JFrame{
	JCheckBox [] fruits = new JCheckBox[3];
	JLabel sumLa = new JLabel("현재 0원입니다.");
	int sum = 0;
	JCheckBoxEx(){
		setTitle("JCheckBoxEx");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c = getContentPane();
		c.setLayout(new FlowLayout());
		c.add(new JLabel("사과: 3000원, 배: 2000원, 체리: 10000원"));
		String[] names = {"사과", "배", "체리"};
		for(int i=0; i<fruits.length; i++) {
			fruits[i] = new JCheckBox(names[i]);
			fruits[i].setBorderPainted(true);
			c.add(fruits[i]);
			fruits[i].addItemListener(new MyItemListener());
		}
		c.add(sumLa);
				
		setSize(300,300);
		setVisible(true);
	}
	
	class MyItemListener implements ItemListener{
		@Override
		public void itemStateChanged(ItemEvent e) {			
			if(e.getStateChange() == ItemEvent.SELECTED) {
				if(e.getItem() == fruits[0])
					sum += 3000;
				else if(e.getItem() == fruits[1])
					sum += 2000;
				else
					sum += 10000;
			}
			else{
				if(e.getItem() == fruits[0])
					sum -= 3000;
				else if(e.getItem() == fruits[1])
					sum -= 2000;
				else
					sum -= 10000;
			}
			sumLa.setText("현재 가격은"+sum+"원입니다.");
		}
	}
	
	public static void main(String[] args) {
		new JCheckBoxEx();
	}
}

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

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.SwingConstants;

public class JRadioButtonEx extends JFrame{
	JRadioButton []radio = new JRadioButton[3];
	JLabel imgLa = new JLabel();
	ImageIcon []imgIcon = {new ImageIcon("apple.jpg"), new ImageIcon("banana.jpg"), new ImageIcon("kiwi.jpg")};
	
	JRadioButtonEx(){
		setTitle("JRadioButtonEx");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c = getContentPane();
		c.setLayout(new BorderLayout());
	
		//라디오 버튼 패널
		JPanel radioPane = new JPanel();
		radioPane.setBackground(Color.LIGHT_GRAY);
		radioPane.setLayout(new FlowLayout());
		//버튼 그룹 생성
		ButtonGroup g = new ButtonGroup();
		String []names = {"사과","바나나","키위"};
		for(int i=0; i<radio.length; i++) {
			radio[i] = new JRadioButton();
			g.add(radio[i]);
			radioPane.add(radio[i]);
			radio[i].addItemListener(new MyItemListener());
		}
		radio[0].setSelected(true);
		c.add(radioPane, BorderLayout.NORTH);
		c.add(imgLa,BorderLayout.CENTER);
		imgLa.setHorizontalAlignment(SwingConstants.CENTER);
		
		setSize(300,300);
		setVisible(true);
	}
	
	class MyItemListener implements ItemListener{
		@Override
		public void itemStateChanged(ItemEvent e) {
			if(e.getStateChange() == ItemEvent.DESELECTED)
				return;
			if(radio[0].isSelected())
				imgLa.setIcon(imgIcon[0]);
			else if(radio[1].isSelected())
				imgLa.setIcon(imgIcon[1]);
			else
				imgLa.setIcon(imgIcon[2]);
		}
	}
	
	public static void main(String[] args) {
		new JRadioButtonEx();
	}

}