JDK Frame内容区绘制边框

package taishan;
import java.awt.Color;
import java.awt.Graphics;
@SuppressWarnings("serial")
public abstract class RotateFontFrameAbstract extends TFrame
{
    private   final static int    FRAME_WIDTH  = 540;
    private   final static int    FRAME_HEIGHT = 480;
  private void drawFrameBorder(Graphics g)
  {
  int startX = 8;
  int startY = 31;
  int endX   = FRAME_WIDTH  - 9;
  int endY   = FRAME_HEIGHT - 9;
  g.setColor(COLOR_BORDER);
  g.drawLine(startX, startY, FRAME_WIDTH, startY);
  g.drawLine(startX, startY, startX,      FRAME_HEIGHT);
  g.drawLine(startX, endY,   endX,        endY);
  g.drawLine(endX,   startY, endX,        endY);
  }
  @Override
    public final void paint(Graphics g)
    {
  super.paint(g);
        drawFrameBorder();
    }
  protected final static void display(TFrame frame)
  {
        frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
        frame.setVisible(true);
  }
}