www.pudn.com > TextAreaTest.rar > TextAreaTest.java

/** 
   @version 1.30 2000-05-12 
   @author Cay Horstmann 
*/ 
 
import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 
 
public class TextAreaTest  
{ 
   public static void main(String[] args) 
   {   
      TextAreaFrame frame = new TextAreaFrame(); 
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
      frame.show(); 
   } 
} 
 
/** 
   A frame with a text area and buttons for text editing 
*/ 
class TextAreaFrame extends JFrame 
{   
   public TextAreaFrame() 
   {   
      setTitle("TextAreaTest"); 
      setSize(WIDTH, HEIGHT); 
 
      Container contentPane = getContentPane(); 
 
      buttonPanel = new JPanel(); 
 
      // add button to append text into the text area 
 
      JButton insertButton = new JButton("Insert"); 
      buttonPanel.add(insertButton); 
      insertButton.addActionListener(new 
         ActionListener() 
         { 
            public void actionPerformed(ActionEvent event) 
            { 
               textArea.append("The quick brown fox " 
                  + "jumps over the lazy dog. "); 
            } 
         }); 
 
      // add button to turn line wrapping on and off 
 
      wrapButton = new JButton("Wrap"); 
      buttonPanel.add(wrapButton); 
      wrapButton.addActionListener(new 
         ActionListener() 
         { 
            public void actionPerformed(ActionEvent evt) 
            {   
               boolean wrap = !textArea.getLineWrap(); 
               textArea.setLineWrap(wrap); 
               scrollPane.validate(); 
               wrapButton.setText(wrap ? "No Wrap" : "Wrap"); 
            } 
         }); 
     
      contentPane.add(buttonPanel, BorderLayout.SOUTH); 
 
      // add a text area with scroll bars 
       
      textArea = new JTextArea(8, 40); 
      scrollPane = new JScrollPane(textArea); 
 
      contentPane.add(scrollPane, BorderLayout.CENTER); 
   } 
 
   public static final int WIDTH = 300; 
   public static final int HEIGHT = 300;   
 
   private JTextArea textArea; 
   private JScrollPane scrollPane; 
   private JPanel buttonPanel; 
   private JButton wrapButton; 
}