testjscrollpane.java

java2 primer plus一书源程序

/*
 * TestJScrollPane.java
 *
 * Created on July 30, 2002, 11:35 AM
 */

package ch16;

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

/**
 *
 * @author  Stephen Potts
 * @version
 */
public class TestJScrollPane extends JFrame
{
   JScrollPane sp;
   JTextField tf1;
   JTextField tf2;
   JTextField tf3;
   JTextField tf4;
   JTextField tf5;
   JTextField tf6;
   JTextField tf7;
   JTextField tf8;
   
   /** Creates new TestJScrollPane */
   public TestJScrollPane()
   {
      //create eight text fields
      tf1 = new JTextField("Text Field Number 1 ");
      tf2 = new JTextField("Text Field Number 2 ");
      tf3 = new JTextField("Text Field Number 3 ");
      tf4 = new JTextField("Text Field Number 4 ");
      tf5 = new JTextField("Text Field Number 5 ");
      tf6 = new JTextField("Text Field Number 6 ");
      tf7 = new JTextField("Text Field Number 7 ");
      tf8 = new JTextField("Text Field Number 8 ");
      
      //add the panel
      JPanel p1 = new JPanel();
      p1.add(tf1);
      p1.add(tf2);
      p1.add(tf3);
      p1.add(tf4);
      p1.add(tf5);
      p1.add(tf6);
      p1.add(tf7);
      p1.add(tf8);

      //create the scroll pane
      sp = new JScrollPane(p1);
      sp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
      sp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

      getContentPane().add(sp);
      this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setTitle("Using a JScrollPane");
      setBounds( 100, 100, 300, 300);
      setVisible(true);
      sp.scrollRectToVisible(new Rectangle(150,150,300,300));
   }
   
   public static void main(String[] args)
   {
      TestJScrollPane tsp = new TestJScrollPane();
   }
   
}