下面的示例展示了如何在Java Swing应用程序中使用垂直滑块。
使用以下API -
JSlider(orientation, min, max, value)- 在方向设置垂直方向时创建滑块。JSlider.getValue()- 获取滑块的当前值。
示例
package com.yiibai.swingdemo;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class SwingTester {
private JFrame mainFrame;
private JLabel headerLabel;
private JLabel statusLabel;
private JPanel controlPanel;
public SwingTester(){
prepareGUI();
}
public static void main(String[] args){
SwingTester swingControlDemo = new SwingTester();
swingControlDemo.showSliderDemo();
}
private void prepareGUI(){
mainFrame = new JFrame("Swing创建垂直滑块示例");
mainFrame.setSize(400,700);
mainFrame.setLayout(new GridLayout(3, 1));
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
System.exit(0);
}
});
headerLabel = new JLabel("", JLabel.CENTER);
statusLabel = new JLabel("",JLabel.CENTER);
statusLabel.setSize(350,100);
controlPanel = new JPanel();
controlPanel.setLayout(new FlowLayout());
mainFrame.add(headerLabel);
mainFrame.add(controlPanel);
mainFrame.add(statusLabel);
mainFrame.setVisible(true);
}
private void showSliderDemo(){
headerLabel.setText("Control in action: JSlider");
JSlider slider = new JSlider(JSlider.VERTICAL,0,100,10);
slider.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
statusLabel.setText("当前值 : " + ((JSlider)e.getSource()).getValue());
}
});
controlPanel.add(slider);
mainFrame.setVisible(true);
}
}
执行上面示例代码，得到以下结果：
