Java代碼，敲代碼

public class Vehicles {

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private String brand;

private String color;

//構(gòu)造方法

public Vehicles(String brand, String color) {

this.brand = brand;

this.color = color;

}

public void run() {

System.out.println("我已經(jīng)開動了");

}

public void showinfo() {

System.out.println("商標(biāo)： " + brand);

System.out.println("顏色： " + color);

}

}

保存為Vehicles.java

/////////////////////////////////////////////////////////////

public class Car extends Vehicles {

private int seats;

//構(gòu)造方法

public Car(String brand, String color, int seats) {

super(brand, color);

this.seats = seats;

}

public void showCar() {

super.showinfo();

System.out.println("座位： " + seats + " 個");

}

}

保存為 Car.java

//////////////////////////////////////////////////////////////////////////////

public class Truck extends Vehicles {

private float load;

public Truck(String brand, String color, float load) {

super(brand, color);

this.load = load;

}

public void showTruck() {

super.showinfo();

System.out.println("載重 ：" + load + "噸");

}

}

保存為Truck.java

//////////////////////////////////////////////////////////////////////////////

public class Test {

public static void main(String[] args) {

Vehicles vehicle = new Vehicles("奧迪", "黑色");

vehicle.showinfo();

Car car = new Car("桑塔納", "紅色", 5);

car.showCar();

Truck truck = new Truck("解放", "藍(lán)色", 10);

truck.showTruck();

}

}

作為一個Java初學(xué)者,照著書敲代碼有用嗎

絕對是有用的，很大用出。

代碼就是這樣，你只有敲得多了才會慢慢學(xué)好。

不要怕累，多聯(lián)系會好的。

如有幫助請采納謝謝

頁面特效:下星星的代碼(JAVA代碼)

以下的代碼就可以，lz自己在*的地方填入星星的圖片就可以了

body bgcolor=#ee3300

style

.drop { position: absolute; width: 3; filter: flipV(), flipH(); font-size: 40; color: #ffffff }

/style

script language="javascript"

snow = false; // false-rain; true-snow

snowsym = " * " are the symbols for each

rainsym = " * " can put images here.

howmany = 20 many drops/snowflakes?

/**************Do not need to change anything below***********/

if(snow){sym = snowsym; speed=1; angle=10; drops=howmany}

else{sym = rainsym; speed=30; drops=howmany; angle=6}

movex = -speed/angle; movey = speed; count = 0;

function moverain(){

for(move = 0; move drops; move++){

xx[move]+=movex; yy[move]+=mv[move];

hmm = Math.round(Math.random()*1);

if(xx[move] 0){xx[move] = maxx+10;}

if(yy[move] maxy){yy[move] = 10;}

drop[move].left = xx[move]

drop[move].top = yy[move]+document.body.scrollTop;

}setTimeout('moverain()','1')}

/script

script language="javascript"

if (document.all){

drop = new Array(); xx = new Array(); yy = new Array(); mv = new Array()

ly = "document.all[\'"; st = "\'].style"

for(make = 0; make drops; make++){

document.write('div id="drop'+make+'" class=drop'+sym+'/div');

drop[make] = eval(ly+'drop'+make+st);

maxx = document.body.clientWidth-40

maxy = document.body.clientHeight-40

xx[make] = Math.random()*maxx;

yy[make] = -100-Math.random()*maxy;

drop[make].left = xx[make]

drop[make].top = yy[make]

mv[make] = (Math.random()*5)+speed/16;

drop[make].fontSize = (Math.random()*10)+20;

if(snow){col = 'white'}else{col = 'white'}

drop[make].color = col;

}

window.onload=moverain

}

/script

/body

java編按鼠標(biāo)就發(fā)射子彈代碼

監(jiān)聽鼠標(biāo)動作，

然后控制子彈圖片移動。

然后跟目標(biāo)做碰撞檢測。

java 事件 消息傳遞機制 實際上是

1、用戶點擊鼠標(biāo)左鍵。

2、操作系統(tǒng)觸發(fā)一個事件傳遞個java程序。

3、java程序再去觸發(fā)你代碼里相關(guān)控件的ui響應(yīng)或者你自己定義的Listener。

我認(rèn)為想要實現(xiàn)你的需求的話，忽略1，在2處模擬操作系統(tǒng)同，傳遞一個事件給java程序了，這只是我的一個想法。

java全是代碼，怎么會做出非常漂亮的畫面

唉，給你看看小Case的,自己運行一下

import java.awt.AlphaComposite;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.SwingUtilities;

public class TranslucentButton extends JButton {

BufferedImage buttonImage = null;

/** Creates a new instance of TranslucentButton */

public TranslucentButton(String label) {

super(label);

setOpaque(false);

}

public void paint(Graphics g) {

// Create an image for the button graphics if necessary

if (buttonImage == null || buttonImage.getWidth() != getWidth() ||

buttonImage.getHeight() != getHeight()) {

buttonImage = getGraphicsConfiguration().

createCompatibleImage(getWidth(), getHeight());//返回一個數(shù)據(jù)布局和顏色模型與此 GraphicsConfiguration 兼容的 BufferedImage

}

Graphics gButton = buttonImage.getGraphics();

gButton.setClip(g.getClip());//設(shè)置獲取的當(dāng)前的剪貼區(qū)域

// Have the superclass render the button for us

super.paint(gButton);

// Make the graphics object sent to this paint() method translucent

Graphics2D g2d = (Graphics2D)g;

AlphaComposite newComposite =

AlphaComposite.getInstance(AlphaComposite.SRC_OVER, .5f);

g2d.setComposite(newComposite);

// Copy the button's image to the destination graphics, translucently

g2d.drawImage(buttonImage, 0, 0, null);

}

private static void createAndShowGUI() {

JFrame f = new JFrame();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.setSize(300, 300);

JPanel checkerboard = new Checkerboard();

checkerboard.add(new TranslucentButton("Translucent Button"));

f.add(checkerboard);

f.setVisible(true);

}

public static void main(String args[]) {

Runnable doCreateAndShowGUI = new Runnable() {

public void run() {

createAndShowGUI();

}

};

SwingUtilities.invokeLater(doCreateAndShowGUI);//swing線程

}

private static class Checkerboard extends JPanel {

static final int CHECKER_SIZE = 60;

public void paintComponent(Graphics g) {

g.setColor(Color.white);

g.fillRect(0, 0, getWidth(), getHeight());

g.setColor(Color.BLACK);

for (int stripeX = 0; stripeX getWidth(); stripeX += CHECKER_SIZE) {

for (int y = 0, row = 0; y getHeight(); y += CHECKER_SIZE/2, ++row) {

int x = (row % 2 == 0) ? stripeX : (stripeX + CHECKER_SIZE/2);

g.fillRect(x, y, CHECKER_SIZE/2, CHECKER_SIZE/2);

}

}

}

}

}

用java線程做飛機大戰(zhàn)，發(fā)射子彈及爆炸的代碼怎么寫啊，求高人，寫上注釋吧，不然看不懂，謝謝

代碼有點多, 實現(xiàn)思路, 實現(xiàn)鍵盤事件監(jiān)聽機制, 在監(jiān)聽函數(shù)中判斷 按了什么鍵,比如按J就發(fā)送子彈. 然后啟動子彈線程. 定義一個子彈類線程, 定義出子彈的所在屬性和方法.

寫個方法,判斷子彈是否擊中目標(biāo),以XY坐標(biāo)相交來判斷