java題目求解2

public?class?$?{

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

Glede?glede?=?new?Glede("老鷹");

glede.sound();

System.out.println("最大飛行速度:"?+?glede.flySpeed());

Pigeon?pigeon?=?new?Pigeon("鴿子");

pigeon.sound();

System.out.println("最大飛行速度:"?+?pigeon.flySpeed());

}

}

abstract?class?Animal?{

private?String?type;

public?Animal(String?type)?{

this.type?=?type;

}

public?String?getType()?{

return?type;

}

public?void?setType(String?type)?{

this.type?=?type;

}

public?abstract?void?sound();

public?String?toString()?{

return?type;

}

}

interface?Flyable?{

double?flySpeed();

}

class?Glede?extends?Animal?implements?Flyable?{

public?Glede(String?type)?{

super(type);

}

public?double?flySpeed()?{

return?100;

}

public?void?sound()?{

System.out.println("老鷹叫");

}

}

class?Pigeon?extends?Animal?implements?Flyable?{

public?Pigeon(String?type)?{

super(type);

}

public?double?flySpeed()?{

return?20;

}

public?void?sound()?{

System.out.println("鴿子叫");

}

}

java編寫Animal類

//接口的定義

interface Animal {

public void bark();

public void fly();

}

//老鷹類

class Eagle implements Animal {

public void bark() {

System.out.println("老鷹叫");

}

public void fly() {

System.out.println("老鷹飛");

}

}

//鴿子類

class Pigeon implements Animal{

public void bark() {

System.out.println("鴿子叫");

}

public void fly() {

System.out.println("鴿子飛");

}

}

//測試類

public class Test{

public static void main(String[] args){

Animal pigeon = new Pigeon();

Animal eagle = new Eagle();

pigeon.bark();

pigeon.fly();

eagle.bark();

eagle.fly();

}

}

如果還有什么疑問..請百度Hi我.. 我會進一步的為你解答..

Java編程。求鴿子和兔子數(shù)

x+y=n

2x+4y=m

得：

x=2n-m/2

y=m/2-n

二元一次方程組 不存在多解

代碼如下

import?java.util.Scanner;

public?class?Test?{

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

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

System.out.println("請輸入頭的數(shù)量");

int?n?=?in.nextInt();

System.out.println("請輸入腳的數(shù)量");

int?m?=?in.nextInt();

int?x?=?2*n-m/2;

int?y?=?m/2-n;

if?(x?+?y?!=?n?||?2?*?x?+?4?*?y?!=?m)?{

System.out.println("error");

}?else?if?(x??0?||?y??0)?{

System.out.println("error");

}?else?{

System.out.println(x?+?"?"?+?y);

}

}

}

編寫一個java接口小程序

abstract?class?Animal?{

private?double?weight;

abstract?void?say();

abstract?void?eat();

public?Animal()?{

this.weight?=?0;

}

public?Animal(double?weight)?{

this.weight?=?weight;

}

public?double?getWeight()?{

return?weight;

}

public?void?setWeight(double?weight)?{

this.weight?=?weight;

}

}

interface?Flyable?{

void?flySpeed();

}

class?Glede?extends?Animal?implements?Flyable?{

public?void?flySpeed()?{

System.out.println("10m/s");

}

@Override

void?say()?{

System.out.println("啊啊啊啊");

}

@Override

void?eat()?{

System.out.println("老鼠");

}

}

class?Pigeon?extends?Animal?implements?Flyable?{

public?void?flySpeed()?{

System.out.println("5m/s");

}

@Override

void?say()?{

System.out.println("咕咕咕咕");

}

@Override

void?eat()?{

System.out.println("蟲子");

}

}

public?class?Test?{

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

Glede?glede?=?new?Glede();

glede.flySpeed();

glede.say();

glede.eat();

Pigeon?pigeon?=?new?Pigeon();

pigeon.flySpeed();

pigeon.say();

pigeon.eat();

}

}

新聞名稱：Java寫鴿子代碼,代碼 鴿子
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