java画乌龟

首先，手动画一个小乌龟，如下：

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然后，按照Java绘图基本步骤一步步来。

swing 编程步骤:

1. 继承JFrame

2. 定义组件

3.创建组件（构造函数）

4.添加组件

5.对窗体设置

6.显示窗体

最终效果如下：

代码如下：

/** 

* 功能：画一个乌龟 

*/  

package com.test1;  

import java.awt.*;  

import javax.swing.*;  

public class MyTortoise  extends JFrame{  

MyPanel2 mp = null;  

//构造函数  

public MyTortoise(){  

mp = new MyPanel2();  

this.add(mp);  

this.setTitle("小乌龟，丑丑哒");  

this.setSize(400,300);  

this.setVisible(true);  

this.setLocation(300,200);  

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  

}  

public static void main(String[] args) {  

MyTortoise mtg = new MyTortoise();  

}     

}  

//我的面板。只有JPanel有画图方法，JFrame没有，故必须在JFrame中添加JPanel  

class MyPanel2 extends JPanel{  

//定义一个乌龟  

Tortoise t = null;  

//构造函数  

public MyPanel2(){    

t = new  Tortoise(100,100);  

}  

//画乌龟  

public void drawTortoise(int x, int y, Graphics g){  

//1.画脸  

g.setColor(Color.green);  

g.fillOval(x+60, y, 30, 15);  

//2.画左眼  

g.setColor(Color.black);  

g.fillOval(x+65, y+3, 5, 5);  

//3.画右眼  

g.fillOval(x+78, y+3, 5, 5);  

//4.画脖子  

g.setColor(Color.green);  

g.fillOval(x+70, y, 10, 42);  

//5.画乌龟壳  

g.setColor(Color.red);  

g.fillOval(x+40, y+40, 70, 100);  

//6.画左上脚  

g.setColor(Color.green);  

g.fillOval(x+15, y+60, 30, 10);  

//7.画右上脚  

g.fillOval(x+105, y+60, 30, 10);  

//8.画左下脚  

g.fillOval(x+15, y+110, 30, 10);  

//9.画右下脚  

g.fillOval(x+105, y+110, 30, 10);  

//10.画尾巴  

g.setColor(Color.black);  

g.drawLine(x+70,y+140,x+130,y+210);  

g.drawOval(x+95, y+150, 30, 30);  

}  

//覆盖JPanel的paint方法  

//Graphics 是绘图的重要类。你可以把他理解成一只画笔  

public void paint(Graphics g){  

//1.调用父类函数完成初始化任务  

//这句话不能少  

super.paint(g);  

//2.画乌龟，调用方法即可  

this.drawTortoise(50, 50, g);  

}  

}  

//定义一个乌龟类  

class Tortoise {  

//表示乌龟的横坐标  

int x = 0;  

//表示乌龟的纵坐标  

int y = 0;  

public int getX() {  

return x;  

}  

public void setX(int x) {  

this.x = x;  

}  

public int getY() {  

return y;  

}  

public void setY(int y) {  

this.y = y;  

}  

public Tortoise(int x, int y){  

this.x = x;  

this.y = y;  

}  

}

用JAVA编程：编写GUI程序，模拟龟兔赛跑游戏

import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Random; import javax.swing.Icon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; //定义一个JFrame窗体作为显示载体 public class TestTortoiseRabbit extends JFrame { private static final long serialVersionUID = 987654321L; static final int MAX_LENGTH = 700; private JButton begin = new JButton("开始"); private JButton exit = new JButton("退出"); private Rabbit rabbit = new Rabbit("兔子"); private Tortoise tortoise = new Tortoise("乌龟"); private JLabel stateOfRabbit = new JLabel(); private JLabel winner; public TestTortoiseRabbit() { super("龟兔赛跑"); setLayout(null); setBounds(200, 150, 800, 400); setDefaultCloseOperation(EXIT_ON_CLOSE); add(rabbit); rabbit.setBounds(20, 100, 50, 20); add(tortoise); tortoise.setBounds(20, 150, 50 ,20); add(stateOfRabbit); stateOfRabbit.setBounds(300, 50, 100 ,20); add(begin);begin.setBounds(20, 200, 80, 30); add(exit);exit.setBounds(100, 200, 80, 30); setVisible(true); begin.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { new Thread(rabbit).start(); new Thread(tortoise).start(); begin.setVisible(false); stateOfRabbit.setText("兔子跑起来了！"); } }); exit.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { System.exit(0); } }); } public static void main(String[] args) { new TestTortoiseRabbit(); } class Tortoise extends JLabel implements Runnable { private static final long serialVersionUID = 12345678L; public Tortoise(String name) { super(name); } public Tortoise(Icon icon) { super(icon); } boolean stop; int speed = 2; int x, y; public void run() { x = getLocation().x; y = getLocation().y; while (!stop) { x += speed; setLocation(x, y); try { Thread.sleep(50); } catch (InterruptedException e) { e.printStackTrace(); } if (x = MAX_LENGTH) { if (TestTortoiseRabbit.this.winner == null) { TestTortoiseRabbit.this.winner = this; } else { JOptionPane.showMessageDialog(TestTortoiseRabbit.this, TestTortoiseRabbit.this.winner.getText()+ "胜利!"); } stop = true; } } } } class Rabbit extends JLabel implements Runnable { private static final long serialVersionUID = 123456789L; public Rabbit(String name) { super(name); } public Rabbit(Icon icon) { super(icon); } boolean stop; int speed = 5; int x, y; Random r = new Random(); public void run() { x = getLocation().x; y = getLocation().y; while (!stop) { x += speed; setLocation(x, y); try { Thread.sleep(50); if(r.nextInt(100) 90){ if(speed == 0){ speed = 3; stateOfRabbit.setText("兔子跑起来了！"); }else{ speed = 0; stateOfRabbit.setText("兔子在睡觉！"); } } } catch (InterruptedException e) { e.printStackTrace(); } if (x = MAX_LENGTH) { stateOfRabbit.setText("兔子到终点了！"); if (TestTortoiseRabbit.this.winner == null) { TestTortoiseRabbit.this.winner = this; } else { JOptionPane.showMessageDialog(TestTortoiseRabbit.this, TestTortoiseRabbit.this.winner.getText()+ "胜利!"); } stop = true; } } } } }

java绘图，求代码

上代码：

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.LayoutManager;

import java.awt.Paint;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

import java.awt.event.*;

public class YuanYiDong extends JFrame{

private static int BANJIN=0;

private static int X=0;

private static int Y=0;

JTextField rTxt=new JTextField(5);

JTextField xField=new JTextField(5);

JTextField yField=new JTextField(5);

JButton paintBt=new JButton("画");

JLabel huaban=new huaban();

JPanel jPanel=new JPanel();

JLabel banjingLabel,xLabel,yLabel;

public YuanYiDong(){

banjingLabel=new JLabel("半径");

xLabel=new JLabel("X坐标");

yLabel=new JLabel("Y坐标");

this.setTitle("圆的移动");

this.setLocation(300,100);

this.setSize(500, 400);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setVisible(true);

this.add(rTxt);

jPanel.setLayout(new FlowLayout());

add(huaban,BorderLayout.CENTER);

jPanel.add(banjingLabel);

jPanel.add(rTxt);

jPanel.add(xLabel);

jPanel.add(xField);

jPanel.add(yLabel);

jPanel.add(yField);

jPanel.add(paintBt);

add(jPanel,BorderLayout.NORTH);

paintBt.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

BANJIN=Integer.parseInt(rTxt.getText());

X=Integer.parseInt(xField.getText());

Y=Integer.parseInt(yField.getText());

huaban.repaint();

}

});

}

private void drawCirlce(Graphics g) {

g.setColor(Color.blue);

g.fillOval(X, Y, BANJIN,BANJIN);

}

public static void main(String[] args) {

YuanYiDong frame = new YuanYiDong();

}

public class huaban extends JLabel{

public huaban(){}

public void paint(Graphics g) {

Image image = createImage(getWidth(), getHeight());

drawCirlce(image.getGraphics());

g.drawImage(image, 0, 0, null);

}

}

}

给分吧！

用java 在窗体中画一个简单图形。

帮你改了一下。

你要画在panel上，然后frame.add(panel)就能显示。

是不是和applet搞混了，applet复写一些方法就能显示，但现在你编的是java gui

import java.awt.*;

import java.awt.Event.*;

import javax.swing.*; //import javax.swing.Timer;

import java.awt.BasicStroke;

//import java.util.Date;

//import java.text.*;

//import java.util.*;

public class TestGui {

public void paint(Graphics g) {

Graphics2D a2d = (Graphics2D) g;

int x = 120, y = 90, width = 150, height = 150;

a2d.setColor(Color.red);

a2d.setStroke(new BasicStroke(3.0f)); // 设置线条宽度，3.0即线的宽度

a2d.drawOval(x, y, width, height);

}

public static void main(String[] args) {

JFrame frame = new JFrame();

// frame.add(new paint(),BorderLayout.CENTER);

frame.setSize(500, 500);

frame.setLocation(200, 200);

frame.setVisible(true);

Panel p = new Panel();

frame.add(p);

// frame.paint(null);

// TODO code application logic here

}

}

class Panel extends JPanel {

// 重新覆盖paint方法

public void paint(Graphics g) {

super.paint(g);

Graphics2D a2d = (Graphics2D) g;

int x = 120, y = 90, width = 150, height = 150;

a2d.setColor(Color.red);

a2d.setStroke(new BasicStroke(3.0f)); // 设置线条宽度，3.0即线的宽度

a2d.drawOval(x, y, width, height);

}

}

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