debug15_1.java

程序练习中包括书中实例程序代码和练习中要用到的代码,是压缩文件

package questions.c15;
import javax.swing.JPanel;
import java.awt.*;
public class Debug15_1 extends JPanel {
   private String sideLength = "10";
   private static final Point START = new Point( 20, 20 );
   void setSideLength( String sideLength ) {
      this.sideLength = sideLength;
   }
   String getSideLength() {
      return sideLength;
   }
   public Dimension getPreferredSize() {
      return new Dimension( 100, 100 );
   }
   public void paintComponent( Graphics g ) {
      super.paintComponent( g );
      int sl = Integer.parseInt( sideLength );
      g.drawRect( START.x, START.y, sl, sl );
   }
}