test_frame.java~3~

主要为一个空间信息管理系统

package edu.whu.poly;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

import java.awt.*;
import java.awt.geom.*;

public class test_frame
    extends Frame
{
  public static void main(String args[])
  {
    new test_frame();
  }

  public test_frame()
  {
    setSize(220, 180);
    setVisible(true);
  }

  public void paint(Graphics g)
  {
    // Obtain a Graphics2D object
    Graphics2D g2 = (Graphics2D) g;

    // Set the rendering quality.
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);

    // define a linear colour gradient
    GradientPaint gp = new GradientPaint(0, 60, Color.red,
                                         0, 120, Color.yellow);
    Ellipse2D r = new Ellipse2D.Float(30, 60, 160, 60);
    g2.setPaint(gp);
    g2.fill(r);

    // set rotation
    g2.transform(AffineTransform.getRotateInstance(Math.PI / 8));
    g2.setFont(new Font("Serif", Font.BOLD, 85));
    g2.setPaint(Color.blue);
    // set compositing rule with transparency
    g2.setComposite(AlphaComposite.getInstance(
        AlphaComposite.SRC_OVER, 0.5f));
    g2.drawString("test_frame", 50, 70);
  }
}