drawjpanel.java

32个java程序源代码

// Tutorial 20: DrawJPanel.java
// This class draws a random rectangle every .25 seconds.
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Random;
import javax.swing.*;

public class DrawJPanel
{
   // no-argument constructor
   public DrawJPanel()
   {
      drawTimer = new Timer( 250, 

         new ActionListener() // anonymous inner class
         {
            // event handler called every 250 microseconds
            public void actionPerformed( ActionEvent event ) 
            {
               drawTimerActionPerformed();
            }
            
         } // end anonymous inner class
         
      ); // end call to new Timer

   }  // end contructor

} // end class drawJPanel

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