소스 코드 제출

//import javax.swing.*;

//import javax.swing.event.*;

//import java.awt.event.*;

//import java.awt.*;

//

//public class Main extends JFrame {

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

// private String[] text = {"LEFT", "RIGHT"};

// private ImageIcon[] image = {

// new ImageIcon("ai-generated-8612487_640.jpg"),

// new ImageIcon("sea-7315960_640.jpg"),

// new ImageIcon("sunset-7760143_640.jpg")};

// private JLabel imageLabel = new JLabel();

//

// int imagenum = 0;

// public Main() {

// setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// Container c = getContentPane();

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

// JPanel radioPanel = new JPanel();

// JPanel imagePanel = new JPanel();

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

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

//

// 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());

// }

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

// imagePanel.add(imageLabel);

// setSize(350,300);

// setVisible(true);

// }

// class MyItemListener implements ItemListener{

//

// public void itemStateChanged(ItemEvent e) {

// if (e.getStateChange()==ItemEvent.SELECTED) {

//

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

// if (imagenum==0) imagenum=2;

// else imagenum--;

// }

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

// if (imagenum==2) imagenum=0;

// else imagenum++;

// }

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

// }

// }

//

// }

//

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

// new Main();

// }

//}

import javax.swing.*;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import java.awt.*;

public class Main extends JFrame {

private JLabel colorLabel;

private JSlider [] sl = new JSlider [3];

private JLabel [] la = new JLabel[3];

public Main() {

setTitle("슬라이더와 ChangeEvent 예제");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container c = getContentPane();

c.setLayout(new FlowLayout());

colorLabel = new JLabel(" SLIDER EXAMPLE ");

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

sl[i] = new JSlider(JSlider.HORIZONTAL,0,255,128);

sl[i].setPaintLabels(true);

sl[i].setPaintTicks(true);

sl[i].setPaintTrack(true);

sl[i].setMajorTickSpacing(50);

sl[i].setMinorTickSpacing(10);

sl[i].addChangeListener(new MyChangeListener());

la[i] = new JLabel("128");

c.add(sl[i]);

c.add(la[i]);

}

sl[0].setForeground(Color.RED);

sl[1].setForeground(Color.GREEN);

sl[2].setForeground(Color.BLUE);

int r = sl[0].getValue();

int g = sl[1].getValue();

int b = sl[2].getValue();

colorLabel.setOpaque(true);

colorLabel.setBackground(new Color(r,g,b));

c.add(colorLabel);

setSize(300,230);

setVisible(true);

}

class MyChangeListener implements ChangeListener {

public void stateChanged(ChangeEvent e) {

int r = sl[0].getValue();

int g = sl[1].getValue();

int b = sl[2].getValue();

colorLabel.setBackground(new Color(r,g,b));

la[0].setText(Integer.toString(r));

la[1].setText(Integer.toString(g));

la[2].setText(Integer.toString(b));

///////////////////////// 폰트크기조절///////////////

colorLabel.setFont(new Font("Arial",Font.PLAIN,r));

}

}

public static void main(String[] args) {

new Main();

}

}