java的小球代碼 java大球吃小球

請問用java從1-33個整數中隨機抽取6個數字 且不重復 1-16隨機抽取一個數，給小球？

完整代碼為：

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public class Main {

public static void main(String[] args) {

int index = 1;

int[] redBalls = new int[6];

Random random = new Random();

boolean getMoreRed = true;

boolean getAgain;

System.out.println("開始抽取紅球！");

while (getMoreRed) {

getAgain = false;

int red = random.nextInt(36) + 1;

System.out.print("本次抽取到的紅球為：[" + red + "]！");

for (int i = 0; i index; i++) {

if (redBalls[i] == red) {

System.out.print("重復抽取，將重新抽取紅球");

getAgain = true;

break;

}

}

System.out.println("");

if (getAgain){

continue;

}

redBalls[index - 1] = red;

index++;

getMoreRed = index 7;

}

System.out.println("抽取到的紅球為：");

Arrays.sort(redBalls);

for (int redBall : redBalls) {

System.out.print(redBall + " ");

}

System.out.println("\n\n開始抽取藍球！");

System.out.println("本次抽取到的藍球為：[" + (random.nextInt(16) + 1) + "]！");

}

}

運行結果：

普通抽取：

重復時抽?。?/p>

java小球碰撞窗體邊緣來回反彈的代碼

import?java.awt.Color;

import?java.awt.Graphics;

import?java.awt.event.WindowAdapter;

import?java.awt.event.WindowEvent;

import?java.util.Random;

import?javax.swing.JFrame;

import?javax.swing.JPanel;

public?class?RunningBallDemo?extends?JFrame?{

public?static?void?main(String?args[])?{

new?RunningBallDemo();

}

public?RunningBallDemo()?{

Ball?ballPanel?=?new?Ball(5,?5);

getContentPane().add(ballPanel);

setBackground(Color.BLACK);

addWindowListener(new?WindowAdapter()?{

public?void?windowClosing(WindowEvent?e)?{

System.exit(0);

}

});

setSize(350,?350);

setVisible(true);

Thread?thread1?=?new?Thread(ballPanel);

thread1.start();

}

}

class?Ball?extends?JPanel?implements?Runnable?{

int?rgb?=?0;

Color?color;

int?x,?y;

int?dx?=?5,?dy?=?5;

Ball(int?x,?int?y)?{

this.x?=?x;

this.y?=?y;

}

@Override

protected?void?paintComponent(Graphics?g)?{

super.paintComponent(g);

setBackground(Color.BLACK);

g.setColor(color);

g.fillOval(x,?y,?50,?50);

}

public?void?run()?{

while?(true)?{

if?(x?=?0)?{

dx?=?5;

updateBallColor();

}?else?if?((x?+?50)?=?getWidth())?{

dx?=?-5;

updateBallColor();

}

if?(y?=?0)?{

dy?=?5;

updateBallColor();

}?else?if?((y?+?50)?=?getHeight())?{

dy?=?-5;

updateBallColor();

}

x?=?x?+?dx;

y?=?y?+?dy;

repaint();

try?{

Thread.sleep(25);

}?catch?(InterruptedException?e)?{

;

}

}

}

public?void?updateBallColor()?{

rgb?=?new?Random().nextInt();

color?=?new?Color(rgb);

}

}

滾動的小球 java源代碼

//Checkers.java

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

//Checkers類

public class Checkers extends JFrame implements ActionListener {

//變量定義

CheckersPanel checkers = new CheckersPanel();

JButton startButton = new JButton("start");

JButton stopButton = new JButton("stop");

//構造函數

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();

}

//響應用戶動作

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);

}

}

//主函數

public static void main(String[] arguments){

Checkers ck = new Checkers();

}

}

//CheckersPanel類

class CheckersPanel extends JPanel implements Runnable{

//變量定義

private Thread runner;

int xPos = 5;

int xMove = 4;

//播放動畫

void playAnimation(){

if (runner ==null);{

runner = new Thread(this);

runner.start();

}

}

//停止動畫

void stopAnimation(){

if (runner !=null);{

runner = null;

}

}

//運行

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){}

}

}

//畫圖形

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);

}

}

關于類的，寫一個球的體積的java代碼

import?java.util.Scanner;

/**

*?計算球的體積

*?

*?@author?young

*

*/

public?class?Volume?{

public?static?void?main(String[]?args)?{

System.out.print("請輸入r：");

Scanner?reader?=?new?Scanner(System.in);

double?r?=?0,?v?=?0;

r?=?reader.nextDouble();

v?=?4?*?3.14159?/?3?*?r?*?r?*?r;

System.out.println("球體積為："?+?String.format("%.2f",?v));

}

}

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