java小球加速运动代码,java小球加速运动代码是多少

[急]求java小程序：绘制一个小球模拟平抛运动

;

 

 

可以这样写：

import javax.swing.*;

import java.awt.*;

class C extends JFrame {

    C() {

        final Point point = new Point();

        add(new JPanel() {

            public void paintComponent(Graphics g) {

                g.fillOval(point.x, point.y, 20, 20);

                point.x = (point.x + 2) % getWidth();

                point.y = (point.x * point.x) / 1000;   // 造就弧线的简单二次方程。

            }

        });

        setSize(777, 666);

        setVisible(true);

        setDefaultCloseOperation(EXIT_ON_CLOSE);

        while (true) {

            repaint(point.x, point.y, 50, 50);

            try { Thread.sleep(10); } catch (Exception ex) {}

        }

    }

    public static void main(String[] args) {

        new C();

    }

}

 

 

 

相关问答

Q1: 用JAVA实现多线程编写,使得许多小球在界面内循环跳动

下面这段代码应该符合你的需求

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class BounceThread

{ public static void main(String[] args)

{ JFrame frame = new BounceThreadFrame();

frame.show();

}

}

class BounceThreadFrame extends JFrame

{ public BounceThreadFrame()

{ setSize(300, 200);

setTitle("Bounce");

addWindowListener(new WindowAdapter()

{ public void windowClosing(WindowEvent e)

{ System.exit(0);

}

} );

Container contentPane = getContentPane();

canvas = new JPanel();

contentPane.add(canvas, "Center");

JPanel p = new JPanel();

addButton(p, "Start",

new ActionListener()

{ public void actionPerformed(ActionEvent evt)

{ Ball b = new Ball(canvas);

b.start();

}

});

addButton(p, "Close",

new ActionListener()

{ public void actionPerformed(ActionEvent evt)

{ canvas.setVisible(false);

System.exit(0);

}

});

contentPane.add(p, "South");

}

public void addButton(Container c, String title,

ActionListener a)

{ JButton b = new JButton(title);

c.add(b);

b.addActionListener(a);

}

private JPanel canvas;

}

class Ball extends Thread

{ public Ball(JPanel b) { box = b; }

public void draw()

{ Graphics g = box.getGraphics();

g.fillOval(x, y, XSIZE, YSIZE);

g.dispose();

}

public void move()

{ if (!box.isVisible()) return;

Graphics g = box.getGraphics();

g.setXORMode(box.getBackground());

g.fillOval(x, y, XSIZE, YSIZE);

x += dx;

y += dy;

Dimension d = box.getSize();

if (x 0)

{ x = 0; dx = -dx; }

if (x + XSIZE = d.width)

{ x = d.width - XSIZE; dx = -dx; }

if (y 0)

{ y = 0; dy = -dy; }

if (y + YSIZE = d.height)

{ y = d.height - YSIZE; dy = -dy; }

g.fillOval(x, y, XSIZE, YSIZE);

g.dispose();

}

public void run()

{ try

{ draw();

for (int i = 1; i = 1000; i++)

{ move();

sleep(5);

}

}

catch(InterruptedException e) {}

}

private JPanel box;

private static final int XSIZE = 10;

private static final int YSIZE = 10;

private int x = 0;

private int y = 0;

private int dx = 2;

private int dy = 2;

}

Q2: 用Eclipse写Java程序

抛砖引玉一下

我觉得该题描述了3个事物

1 小球 Ball

2 放小球的容器 BallPanel

3 小球的控制器 BallControler

public class Ball{

double R = 0d; //球的半径

int cx;//当前小球中心X坐标

int cy;//当前小球中心Y坐标

double angle;//小球运动弧度 ，与cx,cy结合起来用来算出 小球移动到当前时的前一个坐标，及移动到下一个点的坐标

int speed;//小球运动速度，毫秒数

}

public class BallPanel{

double width;//放小球的容器宽

double height;//放小球的容器的高

BallControler []BallControlers;//放了多少个小球

}

public class BallControler extends Thread{

Ball tBall;//该控制器控制的小球

BallControler(Ball tBall){

this.tBall = tBall;

}

private int [] getNextPosition(){

/**

返回下一点的x,y坐标

*/

}

private int [] getPreviousPosition(){

/**

返回前一点的x,y坐标

*/

}

private void moveBall(int x,int y){

//移动小球到指定的x,y坐标。

//有必要的话，可以记录小球的运动轨迹到堆栈中

}

public void run(){

Thread.sleep(tBall.speed);//按照小球规定的速度移动

//下面的代码，计算并且移动小球到下一个点，计算是否碰壁（当前小球中心坐标+半径是否超过BallPanel的长，或者高等）,并且移动小球

}

}

Q3: 如何用Java绘图做出让小球在背景上运动的效果

java是编程语言里比较难学的一门，如果有心从事编程方向的工作，最好到专业机构学习并有更多的项目实践，更贴近市场，这样更有利于将来的发展。

Q4: 滚动的小球 java源代码

//Checkers.java

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

//Checkers类

public class Checkers extends JFrame implements ActionListener {

//变量定义

CheckersPanel checkers = new CheckersPanel();

JButton startButton = new JButton("start");

JButton stopButton = new JButton("stop");

//构造函数

public Checkers(){

super("Checkers");

setSize(210,170);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JPanel pane = new JPanel();

BorderLayout border = new BorderLayout();

pane.setLayout(border);

pane.add(checkers,"Center");

JPanel buttonPanel = new JPanel();

startButton.addActionListener(this);

buttonPanel.add(startButton);

stopButton.addActionListener(this);

stopButton.setEnabled(false);

buttonPanel.add(stopButton);

pane.add(buttonPanel,"South");

setContentPane(pane);

show();

}

//响应用户动作

public void actionPerformed(ActionEvent evt){

if(evt.getSource() == startButton){

checkers.playAnimation();

startButton.setEnabled(false);

stopButton.setEnabled(true);

}else{

checkers.stopAnimation();

startButton.setEnabled(true);

stopButton.setEnabled(false);

}

}

//主函数

public static void main(String[] arguments){

Checkers ck = new Checkers();

}

}

//CheckersPanel类

class CheckersPanel extends JPanel implements Runnable{

//变量定义

private Thread runner;

int xPos = 5;

int xMove = 4;

//播放动画

void playAnimation(){

if (runner ==null);{

runner = new Thread(this);

runner.start();

}

}

//停止动画

void stopAnimation(){

if (runner !=null);{

runner = null;

}

}

//运行

public void run(){

Thread thisThread = Thread.currentThread();

while(runner ==thisThread){

xPos += xMove;

if ((xPos 105)|(xPos 5))

xMove *= -1;

repaint();

try{

Thread.sleep(100);

}catch(InterruptedException e){}

}

}

//画图形

public void paintComponent(Graphics comp){

Graphics2D comp2D = (Graphics2D)comp;

comp2D.setColor(Color.blue);

comp2D.fillRect(0,0,100,100);

comp2D.setColor(Color.white);

comp2D.fillRect(100,0,100,100);

comp2D.setColor(Color.black);

comp2D.fillOval(xPos,5,90,90);

}

}