import java.awt.Color;import javax.swing.JSlider;import javax.swing.JFrame;import javax.swing.JPanel;import java.awt.Dimension;import java.awt.GridLayout; public class JSliderDemo{ public static void main (String[] args) {  JSlider empty = new JSlider ();    JSlider age = new JSlider (JSlider.VERTICAL, 0, 150, 20);//设置方向,最小值，最大值，初始值    JSlider append = new JSlider ();  append.setOrientation (JSlider.HORIZONTAL);//设置方向  append.setMinimum (0);//设置最小值  append.setMaximum (100);//设置最大值  append.setMajorTickSpacing (20);//设置主标号间隔  append.setMinorTickSpacing (5);//设置辅标号间隔  append.setPaintLabels (true);//Default:false显示标签  append.setPaintTicks (true);//Default:false显示标号  append.setPaintTrack (true);//Determines whether the track is painted on the slider  append.setValue (0);//设置初始值      JPanel panel = new JPanel (new GridLayout (0,1));  panel.setPreferredSize (new Dimension (600,400));  panel.add (empty);  panel.add (age);  panel.add (append);      JFrame frame = new JFrame ("JProgressBarDemo");  frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);  frame.setContentPane (panel);  frame.pack();  frame.show(); }}  

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