关于#java#的问题：调用infPrint

创建一个Animal类，私有成员变量name（String），age（int ）和公共成员方法：infPrint()(输出成员变量name，age,通过调用toString（）实现)、shout()（发出叫声）；
1) 创建一个Dog类，通过extends关键字继承Animal类，有私有成员color（String），及其setter和getter方法；重写shout()（发出汪汪叫声），重写infPrint()；
2) 在主方法中使用new 创建一个Dog对象dog1，并通过setter方法颜色为黑色 ;调用infPrint()
3） 在主方法中通过dog1调用shout().
4) 在主方法中使用new 创建一个Dog对象dog2，通过setter方法给三个成员变量赋值：金毛犬 2，黄色，调用infPrint()

class Animal{
    private String name;
    private int age;
    public void shout() {
        
    }
    public void setName(String name) {
        this.name = name;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Animal [name=" + name + ", age=" + age;
    }
    public void infPrint() {
        System.out.println(this.toString());
    }
    
}
class Dog extends Animal{
    
    private String color;
    
    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }
    
    @Override
    public void shout() {
        
        System.out.println("汪~汪呜！");
    }

    @Override
    public String toString() {
        return ",color=" + color + "]";
    }

    @Override
    public void infPrint() {
        System.out.println(super.toString()+this.toString());
    }
    
}

public class Answer7731291 {
    public static void main(String[] args) {
        
        Dog dog1 = new Dog();
        dog1.setColor("黑色");
        dog1.infPrint();
        dog1.shout();
        Dog dog2=new Dog();
        dog2.setName("金毛犬");
        dog2.setAge(2);
        dog2.setColor("黄色");
        dog2.infPrint();
    }
}

参考一下，差不多类似的

public class Animal {
 
    private String name;
    private int age;
     
    public Animal(String name, int age){
        this.name = name;
        this.age = age;
    }
     
    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 void outPut(){
        System.out.println("name:"+this.getName());
        System.out.println("age:"+this.getAge());
    }
}
 

 
public interface Eattable {
 
    void beatted();
}
 
package com.animaltest;
 
public class Dog extends Animal{
 
    private String wing;
    private String flyDistance;
     
    public Bird(String name, int age) {
        super(name, age);
        this.wing = wing;
        this.flyDistance = flyDistance;
    }
     
    public String getWing() {
        return wing;
    }
    public void setWing(String wing) {
        this.wing = wing;
    }
    public String getFlyDistance() {
        return flyDistance;
    }
    public void setFlyDistance(String flyDistance) {
        this.flyDistance = flyDistance;
    }
     
    @Override
    public void outPut() {
        super.outPut();
        System.out.println("wing:"+this.getWing());
        System.out.println("flyDistance:"+this.getFlyDistance());
    }
}
 

 
public class Beast extends Animal implements Eattable{
 
    private String localPlace;
    private String food;
     
    public Beast(String name, int age) {
        super(name, age);
        this.localPlace = localPlace;
        this.food = food;
    }
     
    public String getLocalPlace() {
        return localPlace;
    }
 
    public void setLocalPlace(String localPlace) {
        this.localPlace = localPlace;
    }
 
    public String getFood() {
        return food;
    }
 
    public void setFood(String food) {
        this.food = food;
    }
 
    @Override
    public void beatted() {
        System.out.println();
         
    }
     
    @Override
    public void outPut() {
        super.outPut();
        System.out.println("localPlace:"+this.getLocalPlace());
        System.out.println("food:"+this.getFood());
    }
}

Java 对象和类 https://www.runoob.com/java/java-object-classes.html
Java的封装与继承 https://blog.csdn.net/kingJamesbond/article/details/120174591
照着练就行了