滚动条

import java.awt.*;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JOptionPane;

public class ScrollbarTest implements AdjustmentListener,ActionListener {

Frame app = new Frame("滚动条");

// 三个标签数组
Label lblColor[] = {new Label("Red:"),new Label("Green："),new Label("Blue:")};

// 三个滚动条
Scrollbar  scbColor[] = {
new Scrollbar(Scrollbar.HORIZONTAL,0,20,0,255),
new Scrollbar(Scrollbar.HORIZONTAL,0,20,0,255),
new Scrollbar(Scrollbar.HORIZONTAL,0,20,0,255),};

// Button 按钮
Button bt1 = new Button("提交");
Button bt2 = new Button("退出");

void sbinit(){

app.setSize(260,300);
app.setLayout(null);
// 设置滚动条和标签的大小
for(int k = 0;k<3;k++){
lblColor[k].setBounds(110, 60+60*k, 50, 20);
scbColor[k].setBounds(30, 85+60*k, 200, 20);
scbColor[k].addAdjustmentListener(this);
}

//  该for循环用来设置标签和滚动条的背景颜色
for(int i = 0;i<3;i++){
lblColor[0].setBackground(Color.red);
scbColor[0].setBackground(Color.red);
lblColor[1].setBackground(Color.green);
scbColor[1].setBackground(Color.green);
lblColor[2].setBackground(Color.blue);
scbColor[2].setBackground(Color.blue);
}

//  三个标签和三个滚动条添加到窗体中。
for(int k = 0;k<3;k++){
app.add(lblColor[k]);
app.add(scbColor[k]);
}

bt1.setBounds(30, 250, 75,35);
bt2.setBounds(160, 250, 75,35);
bt1.addActionListener(this);
bt2.addActionListener(this);

app.setLocation(200, 100);
app.setVisible(true);
app.setResizable(false);
app.setBackground(Color.gray);
app.add(bt1);
app.add(bt2);
}

public static void main(String[] args){
ScrollbarTest sbt = new ScrollbarTest();
sbt.sbinit();

}

@Override

public void adjustmentValueChanged(AdjustmentEvent e) {
// TODO 自动生成的方法存根
Object ob = e.getSource();
if(ob == scbColor[0]){
System.out.println(scbColor[0].getValue()+" ");
}
else if(ob == scbColor[1]){
System.out.println(scbColor[1].getValue()+" ");
}
else if(ob == scbColor[2]){
System.out.println(scbColor[2].getValue()+" ");
}

}

//  ActionEvent 事件
public void actionPerformed(ActionEvent e){
Object ob = e.getSource();
// 当点击退出按钮时，窗体就回退出。
if(ob == bt2){
System.exit(0);
}
else if(ob == bt1){
Object str = "选择你喜爱的滚动条？";
JOptionPane.showInputDialog(str);
}

}

}