j2d.java

来自「这是一个用jsp+Oracle开发的联系人客户关系管理系统！」· Java 代码 · 共 42 行

package com.ideas.util;

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

public class j2d
    extends Frame {
  public static void main(String args[]) {
    new j2d();
  }

  public j2d() {
    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("Hello World!", 50, 70);
  }
}