java-画笑脸

运行结果(笑脸1)：

代码如下：

package draw;

import java.awt.*;

import java.awt.geom.*;

import javax.swing.*;

import java.awt.font.*;

public class draw {

public static void main(String[] args)

{

EventQueue.invokeLater(new Runnable()

{

public void run()

{

JFrame frame = new DrawFrame();

frame.setTitle("smile");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );

frame.setVisible(true);

}

});

}

}

@SuppressWarnings("serial")

class DrawFrame extends JFrame{

public DrawFrame()

{

add(new DrawComponent());

pack();

}

}

@SuppressWarnings("serial")

class DrawComponent extends JComponent

{

private static final int DEFAULT_WIDTH = 400;

private static final int DEFAULT_HEIGHT = 400;

public void paintComponent(Graphics g){

Graphics2D g2 = (Graphics2D)g;

double centerX = 200;

double centerY = 150;

double radius = 140;

Ellipse2D circle = new Ellipse2D.Double();//画脸

circle.setFrameFromCenter(centerX, centerY, centerX+radius, centerY+radius);

g2.setPaint(Color.YELLOW);

g2.fill(circle);

Ellipse2D mouth1 = new Ellipse2D.Double();

mouth1.setFrameFromCenter(200,165,300,265);//画嘴，一个黄色的圆覆盖一个黑色的圆

g2.setPaint(Color.BLACK);

g2.fill(mouth1);

Ellipse2D mouth2 = new Ellipse2D.Double();

mouth2.setFrameFromCenter(200,120,310,230);

g2.setPaint(Color.YELLOW);

g2.fill(mouth2);

Ellipse2D eyeleft = new Ellipse2D.Double();//画左右眼

eyeleft.setFrameFromCenter(145, 120, 167, 142);

g2.setPaint(Color.BLACK);

g2.fill(eyeleft);

Ellipse2D eyeright = new Ellipse2D.Double();

eyeright.setFrameFromCenter(245, 120,267, 142);

g2.setPaint(Color.BLACK);

g2.fill(eyeright);

String message = "Smiling...";

Font f= new Font("Serif",Font.BOLD+Font.ITALIC,30);//创建字符串，设置字体

g2.setFont(f);

FontRenderContext context = g2.getFontRenderContext();//使其位置居中

Rectangle2D bounds = f.getStringBounds(message, context);

double x = (getWidth()-bounds.getWidth())/2;

g2.drawString(message, (int)x, 350);

}

public Dimension getPreferredSize(){return new

Dimension(DEFAULT_WIDTH,DEFAULT_HEIGHT);}

}

运行结果（笑脸2）：

代码如下：

package draw;

import java.awt.*;

import java.awt.geom.*;

import javax.swing.*;

import java.awt.font.*;

public class smile {

public static void main(String[] args)

{

EventQueue.invokeLater(new Runnable()

{

public void run()

{

JFrame frame = new DrawFrame();

frame.setTitle("smile");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );

frame.setVisible(true);

}

});

}

}

@SuppressWarnings("serial")

class DrawFrame extends JFrame{

public DrawFrame()

{

add(new DrawComponent());

pack();

}

}

@SuppressWarnings("serial")

class DrawComponent extends JComponent

{

private static final int DEFAULT_WIDTH = 400;

private static final int DEFAULT_HEIGHT = 400;

public void paintComponent(Graphics g){

Graphics2D g2 = (Graphics2D)g;

double centerX = 200;

double centerY = 150;

double radius = 140;

Ellipse2D circle = new Ellipse2D.Double();//画脸

circle.setFrameFromCenter(centerX, centerY, centerX+radius, centerY+radius);

g2.setPaint(Color.YELLOW);

g2.fill(circle);

g2.setColor(Color.BLACK);

g2.drawArc(100, 80, 200, 180, 180,180);//画弧

Ellipse2D eyeleft = new Ellipse2D.Double();

eyeleft.setFrameFromCenter(145, 120, 167, 142);

g2.setPaint(Color.BLACK);

g2.fill(eyeleft);

Ellipse2D eyeright = new Ellipse2D.Double();//画左右眼

eyeright.setFrameFromCenter(245, 120,267, 142);

g2.setPaint(Color.BLACK);

g2.fill(eyeright);

String message = "Smile...";

Font f = new Font("DialogInput",Font.BOLD+Font.ITALIC,30);

g2.setFont(f); //设置字符串

FontRenderContext context = g2.getFontRenderContext();

Rectangle2D bounds = f.getStringBounds(message, context);

double x = (getWidth()-bounds.getWidth())/2;

g2.drawString(message, (int)x, 350);

}

public Dimension getPreferredSize(){return new Dimension(DEFAULT_WIDTH,DEFAULT_HEIGHT);}

}