编辑代码

class Main {
	public static void main(String[] args) {
        //JSRUN引擎2.0，支持多达30种语言在线运行，全仿真在线交互输入输出。
		System.out.println("Hello world!   - java.jsrun.net ");
	}
}

class Animal{
    private String name;
    private int id;
    public Animal (String myName,int myid){
        name = myName;
        id = myid;
    }
    public void eat(){
        System.out.println(name + "正在吃");
    }
    public void sleep(){
        System.out.println(name + "正在睡");
    }
    public void introdution(){
        System.out.println("大家hao我是")
    }
}
class Main {
	public static void main(String[] args) {
        //JSRUN引擎2.0，支持多达30种语言在线运行，全仿真在线交互输入输出。

        Penguin p = new Penguin("Penguin", 23432);
        Mouse m = new Mouse("Mouse", 324234);

        p.eat("fish");
        //Animal a = new Animal("动物", 23432);
       // a.setName("动物1号");
       // m.eat();
       // m.introduction();
       // System.out.println(a.getName());
		System.out.println("Hello world!   - java.jsrun.net ");
	}
}


class Animal { 
    private String name;  
    private int id; 
    public Animal(String myName, int myid) { 
        name = myName; 
        id = myid;
    } 
    public void eat(){ 
        System.out.println(name+"正在吃"); 
    }
    public void sleep(){
        System.out.println(name+"正在睡");
    }
    public void introduction() { 
        System.out.println("大家好！我是"         + id + "号" + name + "."); 
    } 
    public void setName(String name){
        this.name = name;
    }
    public String getName(){
        return this.name;
    }
    public int getId(){
        return this.id;
    }
}

class Penguin extends Animal { 
    public Penguin(String myName, int myid) { 
        super(myName, myid); 
    } 

    public void eat(){
         System.out.println(this.getName()+"正在吃"+this.getId()); 
    }
    public String eat(String food){
         System.out.println(this.getName()+"正在吃"+food+this.getId()); 
         return food;
    }
}

class Mouse extends Animal { 
    public Mouse(String myName, int myid) { 
        super(myName, myid); 
    } 
}