猫，狗叫JAVA

错在:

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int s;

s=in.readLine();

in.readLine()得到的是String类型,不能直接转化为int,因此要改写为

int s;

s = Integer.valueOf(in.readLine());

并在函数声明出加上throws语句如下:

public static void main(String[] args) throws NumberFormatException, IOException

修改后代码为.

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class jiaojiao implements dog, cat, niu {

public static void main(String[] args) throws NumberFormatException, IOException {

System.out.println("输入序号以让各个动物叫,1是狗,2是猫,3是牛");

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

int s;

s = Integer.valueOf(in.readLine());

switch (s) {

case 1:

System.out.print("动物名字" + dog.name + "动物叫声" + dog.jiao);

;

break;

case 2:

System.out.print("动物名字" + cat.name + "动物叫声" + cat.jiao);

;

break;

case 3:

System.out.print("动物名字" + niu.name + "动物叫声" + niu.jiao);

break;

}

}

}

interface animal {

String jiao = " ";

String name = " ";

}

// 狗接口继承动物的接口

interface dog extends animal {

String jiao = "wangwang";

String name = "dogs";

}

// 猫接口继承动物的接口

interface cat extends animal {

String jiao = "miaomiao";

String name = "cats";

}

// 牛接口继承动作的接口

interface niu extends animal {

String jiao = "niuniu";

String name = "nius";

}

经测无误

用java多线程写一个猫叫和狗叫混合的程序 求各位大神指点 本人是it菜鸟级别的

一写就写多了，不过包含的东西比较多，java的重要知识点里面也有

这个结构是简单的处理的，有兴趣的话你可以想象下写成一个小的文字游戏

public class D {

public static void main(String[] args){

Cat cat1 = new Cat("Tom" , 10);

Cat cat2 = new Cat("Sun" , 15 , "苹果树");

Dog dog1 = new Dog("lufy" , 5);

Dog dog2 = new Dog("nan" , 20 , "泳池");

cat1.start();

cat2.start();

dog1.start();

dog2.start();

}

}

abstract class Creature extends Thread

{

protected int life; //生物的寿命

protected String name = "";

protected String objname = "";

public void call(){};

public void eat(){};

public void active(int state){};

}

class Cat extends Creature

{

public Cat(String name , int life)

{

this.name = name;

this.life = life;

System.out.println("小猫" + name + "诞生了 , 寿命" + life);

}

public Cat(String name , int life ,String objname)

{

this.name = name;

this.life = life;

this.objname = objname;

System.out.println("小猫" + name + "诞生了 , 寿命" + life + "喜欢" + objname );

}

public void climb()

{

System.out.println("小猫" + name + "在爬树" );

}

public void climb(String objname)

{

System.out.println("小猫" + name + "在爬" + objname + "树");

}

@Override

public void call() {

System.out.println("小猫" + name + "停下来在喵喵的叫" );

}

@Override

public void eat() {

System.out.println("小猫" + name + "饿了，它在吃东西" );

}

@Override

public void active(int state) {

switch(state)

{

case 1:

if(objname.length() 0)

climb(objname);

else

climb();

break;

case 2:

call();

break;

case 3:

eat();

break;

}

}

@Override

public void run() {

//你可以尝试在这里做一个状态机，控制动物的行为

int i = 0 ;

int state = 0 ;

while(i life)

{

double rnd = Math.random();

state = (int)(rnd * 4);//随机出状态

active(state);

i++;

}

System.out.println("小猫" + name + "它的生命结束了，享年" + life);

}

}

class Dog extends Creature

{

public Dog(String name , int life)

{

this.name = name;

this.life = life;

System.out.println("小狗" + name + "诞生了 , 寿命" + life );

}

public Dog(String name , int life , String objname)

{

this.name = name;

this.life = life;

this.objname = objname;

System.out.println("小狗" + name + "诞生了 , 寿命" + life + "喜欢" + objname );

}

public void swim()

{

System.out.println("小狗" + name + "在游泳" );

}

public void swim(String objname)

{

System.out.println("小狗" + name + "在" + objname + "游泳");

}

@Override

public void call() {

System.out.println("小狗" + name + "停下来在喵喵的叫" );

}

@Override

public void eat() {

System.out.println("小狗" + name + "饿了，它在吃东西" );

}

@Override

public void active(int state) {

switch(state)

{

case 1:

if(objname.length() 0)

swim(objname);

else

swim();

break;

case 2:

call();

break;

case 3:

eat();

break;

}

}

@Override

public void run() {

//你可以尝试在这里做一个状态机，控制动物的行为

int i = 0 ;

int state = 0 ;

while(i life)

{

double rnd = Math.random();

state = (int)(rnd * 4);//随机出状态

active(state);

i++;

}

System.out.println("小狗" + name + "它的生命结束了，享年" + life);

}

}

java代码定义一个animal接口,内有shout方法,先返回值类型,再定义三个类,分别实现狗叫声,猫叫声,鸟叫声

interface animal {

void shout();

}

class Dog implements animal{

public void shout(){

System.out.println("汪汪叫");

}

}

class Cat implements animal{

public void shout(){

System.out.println("喵喵叫");

}

}

class Bird implements animal{

public void shout(){

System.out.println("唧唧叫");

}

}

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