原创RGB调节器——JSlider Exercise

来源：互联网发布：获取网页源码有什么用编辑：程序博客网时间：2024/05/22 12:01

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
public class ColorSlider
{
public static void main(String[] args)
{
CSFrame aFrame = new CSFrame();
aFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
aFrame.setVisible(true);
}
}
class CSFrame extends JFrame
{
public CSFrame()
{
setTitle("RGB_Slider");
setSize(400,400);
setLocation(100,100);
r = g = b = 0;
sliderPanel = new JPanel();
colorPanel = new JPanel();
aTextField = new JTextField("R=" + r + ",G=" + g + ",B="+b);
sliderPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
sliderR = new JSlider(0,255,0);
addSlider(sliderR,"R");
sliderG = new JSlider(0,255,0);
addSlider(sliderG,"G");
sliderB = new JSlider(0,255,0);
addSlider(sliderB,"B");
Container content =getContentPane();
JPanel panelB = new JPanel();
panelB.setLayout(new GridLayout(2,1,10,10));
panelB.add(sliderPanel);
panelB.add(colorPanel);
content.add(panelB,BorderLayout.CENTER);
content.add(aTextField,BorderLayout.SOUTH);
}
public void addSlider(JSlider s,String description)
{
s.addChangeListener(new ChangeListener()
{
public void stateChanged(ChangeEvent e)
{
JSlider source = (JSlider)e.getSource();
if(source == sliderR)
r = source.getValue();
else if(source == sliderG)
g = source.getValue();
else if(source == sliderB)
b = source.getValue();
colorPanel.setBackground(new Color(r,g,b));
aTextField.setText("R=" + r + ",G=" + g + ",B="+b);
}
});
JPanel aPanel = new JPanel();
aPanel.add(s);
JLabel aLable = new JLabel(description);
aPanel.add(aLable);
sliderPanel.add(aPanel);
}
private JPanel sliderPanel;
private JPanel colorPanel;
private JSlider sliderR;
private JSlider sliderG;
private JSlider sliderB;
private JTextField aTextField;
private int r,g,b;
}