初學者請求java源代碼

class Car

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{

// 車輛屬性

private String brand; // 品牌

private double engineDisplacement;// 排氣量

private double speed;// 當前速度

private boolean status;// 啟動狀態

private double maxSpeed;// 最大速度

public double getSpeed () {

return this.speed;

}

public Car(String brand, double engineDisplacement, double maxSpeed) {

this.brand = brand;

this.engineDisplacement = engineDisplacement;

this.maxSpeed = maxSpeed;

// 其他屬性也要有初始值，不然執行出錯。

this.speed = 0;

this.status = false;

}

/** 啟動 */

public void start() {

this.status = true;

printNowStatus ();

}

/** 關閉（熄火） */

public void stop() {

// 只在速度為0時關閉（貌似樓上兩位沒仔細看題…）

if (this.speed == 0)

{

this.status = false;

}

printNowStatus ();

}

/** 加速 */

public void speedUp() {

// 只在啟動時可以加速

if (this.status)

{

this.speed = this.speed + 20;

if (this.speed this.maxSpeed)

{

this.speed = this.maxSpeed;

}

}

printNowStatus ();

}

/** 減速 */

public void slowDown() {

// 只在啟動時可以減速

if (this.status)

{

this.speed = this.speed - 10;

if (this.speed 0)

{

this.speed = 0;

}

}

printNowStatus ();

}

/** 狀態打印，在每次啟動，加減速，關閉時調用 */

private void printNowStatus () {

System.out.println("轎車【" + this.brand + "】現在的啟動狀態是：" + this.status + "速度是：" + this.speed +"。");

}

}

public class TestCar

{

public static void main(String[] args)

{

Car myCar = new Car ("紅旗", 2, 120);

//啟動

myCar.start();

// 循環加速到120

while (myCar.getSpeed() 120)

{

myCar.speedUp();

}

//循環減速

while (myCar.getSpeed() 0)

{

myCar.slowDown();

}

//關閉

myCar.stop();

}

}

/* 直接拿文本寫的，我用的電腦沒裝jdk，樓主自己到Java開發環境下調試，應該沒什么問題… */

急～～高手請告訴我如何編寫小汽車的java程序代碼？？重賞！

import java.lang.*;

class Car{

public void safe(){

System.out.println("an quan xi shu gao !");

}

}

class Benz extends Car{

public void safe(){

System.out.println("che hao !");

}

}

class Santana extends Car{

public void safe(){

System.out.println("che hen bu hao hao !");

}

}

public class Test{

public static void main(String[]args){

Car s = new Car();

s.safe();

Benz s1 = new Benz();

s1.safe();

Santana s2 = new Santana();

s2.safe();

Car s3 = new Benz();

s3.safe();

Car s4 = new Santana();

s4.safe();

}

}

這是一個 命名為Test.java

public class Car{

double price;

String name;

int id;

//3個重載的構造方法(name)(id,name)(id,name,price)

public Car(String name){

this(789,name);

}

public Car(int id,String name){

this(id,name,100000);

}

protected Car(int id,String name,double price){

this.price = price;

this.name = name;

this.id = id;

}

//3個重載的普通方法drive(int) drive(String) drive(int ,String)

public void drive(int i){

System.out.println("i = " + i);

System.out.println(price + "\n" + name + "\n" + id);

}

protected String drive(String s){

return "s is: " + s;

}

int drive(int i,String s){

return 2007;

}

}

class Test{

public static void main(String[]args){

Car c1 = new Car(777,"Santana");

c1.drive(18);

}

}

這個命名為Car.java

希望有你要的!

請問如何用Java編寫一個汽車類Car

public class Car {

private String color;//顏色

private int door;//車門數量

private float speed;//車速

public Car(){

this.color = "紅色";

this.door = 3;

this.speed = 110;

}

public Car(String color, int door, float speed) {

this.color = color;

this.door = door;

this.speed = speed;

}

public void start(){

//汽車啟動。輸出汽車已啟動，并輸出汽車的各個屬性

System.out.println("汽車已啟動，汽車顏色為"+color+",車門數為"+door+",車速為"+speed);

}

public void speedUp(float speed){

//加速

System.out.println("汽車加速到"+speed+"km/h");

}

public void shutDown(float speed){

//減速

System.out.println("汽車減速到"+speed+"km/h");

}

public void brake(){

//剎車

System.out.println("已剎車");

}

}

public class Test {

public static void main(String[] args){

Car car = new Car();

car.start();

car.speedUp(100);

car.shutDown(60);

car.brake();

Car car1 = new Car("白色",4,20.2F);

car1.start();

car1.speedUp(100);

car1.shutDown(60);

car1.brake();

}

}

運行結果

JAVA代碼編寫！求幫忙！求教

第一題:

Car.java

public?class?Car?{

public?String?num;

public?float?price;

public?Car(String?num,float?price){

this.num?=?num;

this.price=price;

System.out.println("車牌號為："+num+",價格為："+price);

}

}

測試類:

public?class?CarTest?{

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

Car?car?=?new?Car("京P34E68",?100000.23f);

}

}

輸出為：車牌號為：京P34E68,價格為：100000.23

第二題：

Student.java

public?class?Student?{

private?String?num;

private?String?name;

private?int?age;

private?String?sex;

public?String?getNum()?{

return?num;

}

public?void?setNum(String?num)?{

this.num?=?num;

}

public?String?getName()?{

return?name;

}

public?void?setName(String?name)?{

this.name?=?name;

}

public?int?getAge()?{

return?age;

}

public?void?setAge(int?age)?{

this.age?=?age;

}

public?String?getSex()?{

return?sex;

}

public?void?setSex(String?sex)?{

this.sex?=?sex;

}

public?String?tell()?{

return?"Student?[num="?+?num?+?",?name="?+?name?+?",?age="?+?age+?",?sex="?+?sex?+?"]";

}

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

Student?student?=?new?Student();

student.setAge(18);

student.setNum("001");

student.setName("COLD");

student.setSex("男");

System.out.println(student.tell());

}

}

輸出：Student [num=001, name=COLD, age=18, sex=男]

希望能幫到你，望采納

Java編寫汽車類car

public?class?Car?{

private?int?num;//編號

private?String?name;//型號

private?double?price;//單價

/**

?*?無參構造

?*/

public?Car(){

super();

}

/**

?*?有參構造

?*?@param?num

?*?@param?name

?*?@param?price

?*/

public?Car(int?num,?String?name,?double?price)?{

super();

this.num?=?num;

this.name?=?name;

this.price?=?price;

}

public?int?getNum()?{

return?num;

}

public?void?setNum(int?num)?{

this.num?=?num;

}

public?String?getName()?{

return?name;

}

public?void?setName(String?name)?{

this.name?=?name;

}

public?double?getPrice()?{

return?price;

}

public?void?setPrice(double?price)?{

this.price?=?price;

}

public?String?inforShow()?{

return?"Car?[num="?+?num?+?",?name="?+?name?+?",?price="?+?price?+?"]";

}

}

public?class?PriCar?extends?Car{

private?int?PersonNum;//最大載客量

public?PriCar(int?personNum)?{

super();

PersonNum?=?personNum;

}

public?PriCar()?{

super();

}

public?int?getPersonNum()?{

return?PersonNum;

}

public?void?setPersonNum(int?personNum)?{

PersonNum?=?personNum;

}

@Override

public?String?inforShow()?{

return?"PriCar?[PersonNum="?+?PersonNum?+?"]";

}

}

public?class?VanCar?extends?Car?{

private?double?weight;//最大載重

public?VanCar(double?weight)?{

super();

this.weight?=?weight;

}

public?VanCar()?{

super();

}

@Override

public?String?inforShow()?{

return?"PriCar??[num="?+?super.getNum()?+?",?name="?+?super.getName()?+?",?price="?+?super.getPrice()?+",weight="?+?weight?+?"]";

}

}

測試類不想寫了??應該可以自己寫出來了吧

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