package first;import javax.swing.*;import javax.swing.border.TitledBorder;import java.awt.*;import java.awt.event.*;class P extends JPanel{    JProgressBar pb=new JProgressBar();///定义进度指示条    JSlider sb=new JSlider(JSlider.HORIZONTAL,0,100,60);///定义滑杆    public P()    {        setLayout(new GridLayout());        add(pb);        sb.setValue(0);///滑杆最开始的位置        sb.setPaintTicks(true);        sb.setMajorTickSpacing(20);        sb.setMinorTickSpacing(5);        sb.setBorder(new TitledBorder("移动滑竿"));        pb.setModel(sb.getModel());        pb.setStringPainted(true);        add(sb);    }}public class Test  {    public static void main(String[] args)     {        JFrame f=new JFrame("滑杆和进度指示条");        f.setSize(300,150);        f.add(new P());        f.show();        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    }}