import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class ScrollbarExample implements AdjustmentListener, ActionListener{
 
 JScrollBar scrollBar; 
	
 public ScrollbarExample(){	 
	JFrame frame = new JFrame("Demo");
	Container contentPane =  frame.getContentPane();
 	contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS));
    
	scrollBar = new JScrollBar(JScrollBar.HORIZONTAL, 2, 1, 0, 20);
	scrollBar.setPreferredSize(new Dimension(30, 25));
    scrollBar.addAdjustmentListener(this);
 	contentPane.add(scrollBar);
 
	JButton button = new JButton("move to right");
	button.setAlignmentX(Component.CENTER_ALIGNMENT);
	button.setPreferredSize(new Dimension(30, 20));
	button.addActionListener(this);
	contentPane.add(button);
 
	frame.setSize(300, 100);
	frame.setVisible(true);
 	
 }
 
 public void adjustmentValueChanged(AdjustmentEvent e){
	 
	 System.out.println("current value:" + e.getValue()); 
   	  
 }
 	
 public void actionPerformed(ActionEvent e){
		 
		int currentValue = scrollBar.getValue();
		currentValue++;
		scrollBar.setValue(currentValue);

 }	
 
 public static void main(String args[]) {

	  ScrollbarExample scrollbarExample = new ScrollbarExample();

 } 
}