同一包内的Java继承未找到类

Question

I have two classes within the same folder and package. The location of them is code/src/enemy. These are the two classes:

package src.enemy;

public class Enemy{
  String name = "";
  float maxHealth = 100;
  float health;
  public Enemy(String name) // This made me laugh more than it should
  {
    this.name = name;
    this.health = this.maxHealth;
  }
}

and

package src.enemy;

public class baseEnemy extends Enemy{
public baseEnemy(String name)
{
   super(name);
}

}

For some reason when I try to compile them I get:

:3: error: cannot find symbol
public class baseEnemy extends Enemy{
 symbol: class Enemy

I'm Compiling with Javac. I'm not really sure why baseEnemy can't inherit enemy when they are in the same folder and package.

Answer 1

It's because you have no constructor in your baseEnemy Class. If you change it to:

public class Enemy {

String name = "";
float maxHealth = 100;
float health;
public Enemy(String name) // This made me laugh more than it should
{
    this.name = name;
    this.health = this.maxHealth;
}

public Enemy() {
}
}

and then

public class baseEnemy extends Enemy {

public baseEnemy(String name) {
    super(name);
}
}

it'll be able to feed the name. Ideally level 0 Classes should always have a 0 argument constructor :). Hope that helps.

Answer 2

javac ~/Documents/Assignments/Ass4/Code/src/enemy/Enemy.java. 

No. You should be in ~/Documents/Assignments/Ass4/Code , and issue

javac src/enemy/Enemy.java

and similarly for the other class.

Answer 3

(Posted on behalf of the question author) .

So initially I made the directory and "Code" had a capital c. I Then saw this and made a new folder with a small c. What I didn't realise was that my atom code was referencing the one in the folder with a capital C.