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java接小球游戏代码,scratch接小球游戏代码
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滚动的小球 java源代码
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要制造那种效果只需要大约 30 行 Java 代码：
import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;
class RollingBall extends JPanel {
Ellipse2D.Float ball = new Ellipse2D.Float( -100, 100, 50, 50 );
public void paintComponent( Graphics g ) {
super.paintComponent( g );
Graphics2D g2 = ( Graphics2D ) g;
// Draw the ball
g2.fill( ball );
// Draw the rotating ellipse by skewing the Device Space
double angdeg = // One rotation per ball's travelling over its perimeter
ball.x++ % ( Math.PI * ball.width ) / ( Math.PI * ball.width ) * 360;
g2.rotate( Math.toRadians( angdeg ), ball.getCenterX( ), ball.getCenterY( ) );
g2.scale( .5, 1 );
g2.translate( ball.getCenterX( ), 0 );
g2.setColor( Color.gray );
g2.fill( ball );
}
public void roll( ) throws Exception {
while( true ) {
repaint( );
Thread.sleep( 8 );
}
}
public static void main( String[ ] args ) throws Exception {
JFrame f = new JFrame( );
RollingBall rb = new RollingBall( );
f.setSize( 999, 185 );
f.getContentPane( ).add( rb );
f.setVisible( true );
rb.roll( );
}
}
相关问答
Q1: java程序编写双色球代码
截图：
选取红色球号码方法：
/**
* 随机选取红色球
*
* 获取1~33其中一个数
*
* 0 = Math.random 1
*/
private int randomOneRedValue() {
int randomValue = (int) (Math.random() * 33 + 1);
return randomValue;
}
选取蓝色球号码方法：
/**
* 随机选取蓝色球号码
*
* 获取1~16的数值
*
* @return
*/
private int randomOneBlueValue() {
int randomValue = (int) (Math.random() * 15 + 1);
return randomValue;
}
测试：
public class Test1 {
public static void main(String[] arg) {
Test1 localTest1 = new Test1();
// 双色球 :红色球号码 + 蓝色球号码
// 六个红色球和一个蓝色球号码
// 红色球号码从1~33中选择
// 蓝色球号码从1~16中选择
// 一等奖：七个号码相符（六个红色号码和一个蓝色球号码）(红色球号码顺序不限，下同)
// 二等奖：六个红色球号码相符;
// 三等奖：五个红色球号码，或者四个红色球号码和一个蓝色球号码相符；
// 四等奖：五个红色球号码，或者三个红色球号码和一个蓝色球号码相符；
// 五等奖：四个红色球号码，或者三个红色球号码和一个蓝色球号码相符；
// 六等奖：一个蓝色球号码相符（有误红色球号码相符均可）;
// 例如：红色球号码 01 06 13 19 24 28 蓝色球号码 16
System.out.println("开始出奖");
// 定义双色球数组，大小为7
String[] values = new String[7];
for (int i = 0; i 7; i++) {
if (i == 6) {
int blueValue = localTest1.randomOneBlueValue();
if (blueValue 10) {
values[i] = "0" + blueValue;
} else {
values[i] = String.valueOf(blueValue);
}
} else {
int redValue = localTest1.randomOneRedValue();
if (redValue 10) {
values[i] = "0" + redValue;
} else {
values[i] = String.valueOf(redValue);
}
}
}
System.out.println();
System.out.println("出奖结束");
System.out.println();
System.out.print("双色球开奖号码:");
// 打印双色球号码
for (String value : values) {
System.out.print(" " + value);
}
}
}
Q2: 新手求教java 多线程小球移动
this.addKeyListener(new KeyListener(){
@Override
public void keyPressed(KeyEvent arg0) {
}
@Override
public void keyReleased(KeyEvent arg0) {
}
@Override
public void keyTyped(KeyEvent arg0) {
if(arg0.getKeyChar()==KeyEvent.VK_ENTER){
//干活
}
}
});
Q3: Java,线程小球碰撞游戏,如何制作结束画面？
如果要在 Java 的线程小球碰撞游戏中制作结束画面，需要实现以下步骤：
在程序中创建一个画布，用于绘制结束画面。
在游戏结束时，使用画布的 drawString 方法在画布上绘制文字，表示游戏结束。
使用画布的 repaint 方法刷新画布，让结束画面显示在屏幕上。
例如，可以这样实现结束画面：
// 创建画布
Canvas canvas = new Canvas();
// 绘制文字
canvas.drawString("Game Over", 100, 100);
// 刷新画布
canvas.repaint();
在这里，我们创建了一个画布，并在画布上绘制了文字，表示游戏结束。最后，我们使用了 repaint 方法，让结束画面显示在屏幕上。
此外，如果需要在结束画面上显示更多的信息，比如游戏得分、玩家名字等，也可以使用类似的方法来实现。例如，可以这样显示游戏得分：
// 绘制文字
canvas.drawString("Game Over", 100, 100);
canvas.drawString("Score: " + score, 100, 120);
// 刷新画布
canvas.repaint();
Q4: 求java小游戏源代码
表1. CheckerDrag.java
// CheckerDrag.javaimport java.awt.*;import java.awt.event.*;public class CheckerDrag extends java.applet.Applet{ // Dimension of checkerboard square. // 棋盘上每个小方格的尺寸 final static int SQUAREDIM = 40; // Dimension of checkerboard -- includes black outline. // 棋盘的尺寸 – 包括黑色的轮廓线 final static int BOARDDIM = 8 * SQUAREDIM + 2; // Dimension of checker -- 3/4 the dimension of a square. // 棋子的尺寸 – 方格尺寸的3/4 final static int CHECKERDIM = 3 * SQUAREDIM / 4; // Square colors are dark green or white. // 方格的颜色为深绿色或者白色 final static Color darkGreen = new Color (0, 128, 0); // Dragging flag -- set to true when user presses mouse button over checker // and cleared to false when user releases mouse button. // 拖动标记 --当用户在棋子上按下鼠标按键时设为true， // 释放鼠标按键时设为false boolean inDrag = false; // Left coordinate of checkerboard's upper-left corner. // 棋盘左上角的左方向坐标 int boardx; // Top coordinate of checkerboard's upper-left corner. //棋盘左上角的上方向坐标 int boardy; // Left coordinate of checker rectangle origin (upper-left corner). // 棋子矩形原点(左上角)的左方向坐标 int ox; // Top coordinate of checker rectangle origin (upper-left corner). // 棋子矩形原点(左上角)的上方向坐标 int oy; // Left displacement between mouse coordinates at time of press and checker // rectangle origin. // 在按键时的鼠标坐标与棋子矩形原点之间的左方向位移 int relx; // Top displacement between mouse coordinates at time of press and checker // rectangle origin. // 在按键时的鼠标坐标与棋子矩形原点之间的上方向位移 int rely; // Width of applet drawing area. // applet绘图区域的宽度 int width; // Height of applet drawing area. // applet绘图区域的高度 int height; // Image buffer. // 图像缓冲 Image imBuffer; // Graphics context associated with image buffer. // 图像缓冲相关联的图形背景 Graphics imG; public void init () { // Obtain the size of the applet's drawing area. // 获取applet绘图区域的尺寸 width = getSize ().width; height = getSize ().height; // Create image buffer. // 创建图像缓冲 imBuffer = createImage (width, height); // Retrieve graphics context associated with image buffer. // 取出图像缓冲相关联的图形背景 imG = imBuffer.getGraphics (); // Initialize checkerboard's origin, so that board is centered. // 初始化棋盘的原点，使棋盘在屏幕上居中 boardx = (width - BOARDDIM) / 2 + 1; boardy = (height - BOARDDIM) / 2 + 1; // Initialize checker's rectangle's starting origin so that checker is // centered in the square located in the top row and second column from // the left. // 初始化棋子矩形的起始原点，使得棋子在第一行左数第二列的方格里居中 ox = boardx + SQUAREDIM + (SQUAREDIM - CHECKERDIM) / 2 + 1; oy = boardy + (SQUAREDIM - CHECKERDIM) / 2 + 1; // Attach a mouse listener to the applet. That listener listens for // mouse-button press and mouse-button release events. // 向applet添加一个用来监听鼠标按键的按下和释放事件的鼠标监听器 addMouseListener (new MouseAdapter () { public void mousePressed (MouseEvent e) { // Obtain mouse coordinates at time of press. // 获取按键时的鼠标坐标 int x = e.getX (); int y = e.getY (); // If mouse is over draggable checker at time // of press (i.e., contains (x, y) returns // true), save distance between current mouse // coordinates and draggable checker origin // (which will always be positive) and set drag // flag to true (to indicate drag in progress). // 在按键时如果鼠标位于可拖动的棋子上方 // （也就是contains (x, y)返回true），则保存当前 // 鼠标坐标与棋子的原点之间的距离（始终为正值）并且 // 将拖动标志设为true（用来表明正处在拖动过程中） if (contains (x, y)) { relx = x - ox; rely = y - oy; inDrag = true; } } boolean contains (int x, int y) { // Calculate center of draggable checker. // 计算棋子的中心位置 int cox = ox + CHECKERDIM / 2; int coy = oy + CHECKERDIM / 2; // Return true if (x, y) locates with bounds // of draggable checker. CHECKERDIM / 2 is the // radius. // 如果(x, y)仍处于棋子范围内则返回true // CHECKERDIM / 2为半径 return (cox - x) * (cox - x) + (coy - y) * (coy - y) CHECKERDIM / 2 * CHECKERDIM / 2; } public void mouseReleased (MouseEvent e) { // When mouse is released, clear inDrag (to // indicate no drag in progress) if inDrag is // already set. // 当鼠标按键被释放时，如果inDrag已经为true， // 则将其置为false（用来表明不在拖动过程中） if (inDrag) inDrag = false; } }); // Attach a mouse motion listener to the applet. That listener listens // for mouse drag events. //向applet添加一个用来监听鼠标拖动事件的鼠标运动监听器 addMouseMotionListener (new MouseMotionAdapter () { public void mouseDragged (MouseEvent e) { if (inDrag) { // Calculate draggable checker's new // origin (the upper-left corner of // the checker rectangle). // 计算棋子新的原点（棋子矩形的左上角） int tmpox = e.getX () - relx; int tmpoy = e.getY () - rely; // If the checker is not being moved // (at least partly) off board, // assign the previously calculated // origin (tmpox, tmpoy) as the // permanent origin (ox, oy), and // redraw the display area (with the // draggable checker at the new // coordinates). // 如果棋子（至少是棋子的一部分）没有被 // 移出棋盘，则将之前计算的原点 // (tmpox, tmpoy)赋值给永久性的原点(ox, oy)， // 并且刷新显示区域（此时的棋子已经位于新坐标上） if (tmpox boardx tmpoy boardy tmpox + CHECKERDIM boardx + BOARDDIM tmpoy + CHECKERDIM boardy + BOARDDIM) { ox = tmpox; oy = tmpoy; repaint (); } } } }); } public void paint (Graphics g) { // Paint the checkerboard over which the checker will be dragged. // 在棋子将要被拖动的位置上绘制棋盘 paintCheckerBoard (imG, boardx, boardy); // Paint the checker that will be dragged. // 绘制即将被拖动的棋子 paintChecker (imG, ox, oy); // Draw contents of image buffer. // 绘制图像缓冲的内容 g.drawImage (imBuffer, 0, 0, this); } void paintChecker (Graphics g, int x, int y) { // Set checker shadow color. // 设置棋子阴影的颜色 g.setColor (Color.black); // Paint checker shadow. // 绘制棋子的阴影 g.fillOval (x, y, CHECKERDIM, CHECKERDIM); // Set checker color. // 设置棋子颜色 g.setColor (Color.red); // Paint checker. // 绘制棋子 g.fillOval (x, y, CHECKERDIM - CHECKERDIM / 13, CHECKERDIM - CHECKERDIM / 13); } void paintCheckerBoard (Graphics g, int x, int y) { // Paint checkerboard outline. // 绘制棋盘轮廓线 g.setColor (Color.black); g.drawRect (x, y, 8 * SQUAREDIM + 1, 8 * SQUAREDIM + 1); // Paint checkerboard. // 绘制棋盘 for (int row = 0; row 8; row++) { g.setColor (((row 1) != 0) ? darkGreen : Color.white); for (int col = 0; col 8; col++) { g.fillRect (x + 1 + col * SQUAREDIM, y + 1 + row * SQUAREDIM, SQUAREDIM, SQUAREDIM); g.setColor ((g.getColor () == darkGreen) ? Color.white : darkGreen); } } } // The AWT invokes the update() method in response to the repaint() method // calls that are made as a checker is dragged. The default implementation // of this method, which is inherited from the Container class, clears the // applet's drawing area to the background color prior to calling paint(). // This clearing followed by drawing causes flicker. CheckerDrag overrides // update() to prevent the background from being cleared, which eliminates // the flicker. // AWT调用了update()方法来响应拖动棋子时所调用的repaint()方法。该方法从 // Container类继承的默认实现会在调用paint()之前，将applet的绘图区域清除 // 为背景色，这种绘制之后的清除就导致了闪烁。CheckerDrag重写了update()来 // 防止背景被清除，从而消除了闪烁。 public void update (Graphics g) { paint (g); }}
Q5: [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();
}
}
