java的complie错误：无法找到符号

Question

这是我的四个类别：

J_Animal.java

package Animal; 

public abstract class J_Animal 
{ 
protected String name; 
protected int age; 
protected int weight; 

public void showInfo() 
{ 
    System.out.println("Name : " + this.name); 
    System.out.println("Age : " + this.age); 
    System.out.println("Weight : " + this.weight); 
} 

public abstract void move(); 
public abstract void eat(); 
} 

J_Bird.java

package Animal; 
import Animal.J_Animal; 

public class J_Bird extends J_Animal 
{ 
public J_Bird(String name, int age, int weight) 
{ 
    this.name = name; 
    this.age = age; 
    this.weight = weight; 
} 

public void move() 
{ 
    System.out.println("I'm a bird whose name is " + this.name + ". And I'm flying in the sky."); 
} 

public void eat() 
{ 
    System.out.println("I'm a bird whose name is " + this.name + ". And I'm eating."); 
} 
} 

J_Fish.java

package Animal; 
import Animal.J_Animal; 

public class J_Fish extends J_Animal 
{ 
public J_Fish(String name, int age, int weight) 
{ 
    this.name = name; 
    this.age = age; 
    this.weight = weight; 
} 

public void move() 
{ 
    System.out.println("I'm a fish whose name is " + this.name + ". And I'm swimming in the water."); 
} 

public void eat() 
{ 
    System.out.println("I'm a fish whose name is " + this.name + ". And I'm eating."); 
} 

} 

J_Mammal.java

package Animal; 
import Animal.J_Animal; 

public class J_Mammal extends J_Animal 
{ 
public J_Mammal(String name, int age, int weight) 
{ 
    this.name = name; 
    this.age = age; 
    this.weight = weight; 
} 

public void move() 
{ 
    System.out.println("I'm a mammal whose name is " + this.name + ". And I'm walking on the ground."); 
} 

public void eat() 
{ 
    System.out.println("I'm a mammal whose name is " + this.name + ". And I'm eating."); 
} 
} 

，我写了一个测试类来尝试了一下。 J_TestAnimal.java

import Animal.*; 

public class J_TestAnimal 
{ 
public void TestForFish() 
{ 
    //J_Animal testForAnimal = J_Animal("Joe" , 2, 10); 
    J_Fish testForAnimal = J_Fish("Joe", 2, 10); 
    testForAnimal.showInfo(); 
} 

public static void main(String args[]) 
{ 
    J_TestAnimal j_test =new J_TestAnimal(); 
    j_test.TestForFish(); 
} 
} 

这里是我的目录： C：\ J_TestAnimal

\动物

\J_Animal.class 

\J_Fish.class 

\J_Bird.class 

\J_Mammal.class 

\J_Animal.java 

\J_Fish.java 

\J_Bird.java 

\J_Mammal.java 

\ J_TestAnimal.java

当我运行命令“ javac J_TestAnimal.java“，错误”Can not find the symbol“happen arond：J_TestAnimal.java:8 ：错误：无法找到符号

   J_Fish testForAnimal = J_Fish("Joe", 2, 10); 

Symbol : Method J_Fish(String, int, int) 

Position ： Class J_TestAnimal 

Answer 1

使用new关键字创建J_Fish：

J_Fish testForAnimal = new J_Fish("Joe", 2, 10);