Java无法在单独的文件上找到特定的方法

Question

Im using Visual Studio Code, and I just create a folder with the "project" inside, i dont like to use netbeans, eclipse, etc for small programs.

So I'm creating a small program, that i doubted would work, but it did for the mos part, it creates a rpg like character and a 2nd one and creates a simulated battle in which one character wins based on one stat. Everything seems to work but when I call the method Battle(oumar, aisha); , which takes two characters and has them battle, it gets an error saying Main.java:6: error: cannot find symbol Battle(oumar, aisha); ^ symbol: method Battle(Character,Character) location: class Main Main.java:6: error: cannot find symbol Battle(oumar, aisha); ^ symbol: method Battle(Character,Character) location: class Main

So since im not so experienced im not sure what the problem really is. Here is the code for the main class:

    public class Main {
    public static void main(String args[]) {

        Character oumar = new Character("Oumar", 10);
        Character aisha = new Character("Aisha", 9);
        Battle(oumar, aisha);

    }


}

and here is the second class within a seperate file (still in the same folder)

public class Character {

    String name;
    int BattlePower;
    int wins;
    Character one;
    Character two;

    public Character(String name, int BattlePower) {
        this.name = name;
        this.wins = wins;
        System.out.println("New character: "+ name);
        this.BattlePower = BattlePower;
        this.wins = wins;
        System.out.println(name + "has a Battle Power of " + BattlePower);
    }

    public void Battle(Character one, Character two) {

        this.one = one;
        this.two = two;

        if (one.BattlePower > two.BattlePower ) {
            System.out.print("Character " + one + " has won the Battle!");
            one.wins++;
            System.out.print("Character one now has " + wins + " wins!");
        }
        else if (two.BattlePower > one.BattlePower) {
            System.out.print("Character " + two + " has won the Battle!");
            two.wins++;
            System.out.print("Character two now has " + wins + " wins!");
        }
        else {

            System.out.print("The two characters have tied!");

        }    
    }    
}

Any help would be great, as well as any tips that might help me in the future.

Answer 1

I believe you would need to use

oumar.Battle(oumar, aisha)

or

aisha.Battle(oumar, aisha)

as the method is inside of a non static class so it can't be called without an object reference.

If you want to call it like

Battle(oumar, aisha)

you'll need to move it to the main class.

Also, this issue should be present on those other IDEs as well.

Answer 2

You can put a no-arg constructor inside the Character class like public Character(){}. Then in the Main.java you can use the no-arg constructor to create an object of the Character class and then invoke the method Battle like Character ch1 = new Character(); ch1.Battle(oumar,aisha).