1    package gui.run; 
2     
3    import gui.ClosableJFrame; 
4     
5    import javax.swing.*; 
6    import java.awt.BorderLayout; 
7    import java.awt.Container; 
8    import java.awt.GridLayout; 
9    import java.awt.event.AdjustmentEvent; 
10   import java.awt.event.AdjustmentListener; 
11    
12   public abstract class RunScroll 
13           extends JScrollBar 
14           implements 
15           AdjustmentListener, 
16           Runnable { 
17       public RunScroll(int orientation, 
18                        int value, 
19                        int extent, 
20                        int min, 
21                        int max) { 
22           super(orientation, 
23                   value, 
24                   extent, 
25                   min, 
26                   max); 
27           addAdjustmentListener(this); 
28       } 
29    
30       public RunScroll(int orientation) { 
31           this(orientation, 0, 10, 0, 100); 
32       } 
33    
34       public RunScroll() { 
35           this(VERTICAL); 
36       } 
37    
38       public void adjustmentValueChanged(AdjustmentEvent ae) { 
39           SwingUtilities.invokeLater(this); 
40       } 
41    
42       private static JPanel getScrollBars(int orientation, int n) { 
43           JPanel jp = new JPanel(); 
44           if (orientation == RunScroll.VERTICAL) 
45               jp.setLayout(new GridLayout(1, 0)); 
46           else 
47               jp.setLayout(new GridLayout(0, 1)); 
48           for (int i = 0; i < n; i++) 
49               jp.add(new RunScroll(orientation) { 
50                   public void run() { 
51                       System.out.println("value=" + getValue()); 
52                   } 
53               }); 
54           return jp; 
55       } 
56    
57       public static void main(String args[]) { 
58           ClosableJFrame cf = new ClosableJFrame(); 
59           cf.setSize(200, 200); 
60           Container c = cf.getContentPane(); 
61           c.setLayout(new BorderLayout()); 
62           int n = 9; 
63           c.add(getScrollBars(RunScroll.HORIZONTAL, n), BorderLayout.NORTH); 
64           c.add(getScrollBars(RunScroll.HORIZONTAL, n), BorderLayout.SOUTH); 
65           c.add(getScrollBars(RunScroll.VERTICAL, n), BorderLayout.EAST); 
66           c.add(getScrollBars(RunScroll.VERTICAL, n), BorderLayout.WEST); 
67           cf.setVisible(true); 
68       } 
69   }