これは私の4つのクラスです:
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_哺乳類.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.");
}
}
そして、それを試すためにテストクラスを書きました。 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();
}
}
ここに私のディレクトリがあります: C:\J_TestAnimal
\動物
\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
コマンド「javac J_TestAnimal.java」を実行すると、「シンボルが見つかりません」というエラーが発生しました: J_TestAnimal.java:8: エラー: シンボルが見つかりません
J_Fish testForAnimal = J_Fish("Joe", 2, 10);
Symbol : Method J_Fish(String, int, int)
Position : Class J_TestAnimal