CODEWITHSUNDEEP
javamultidimensional-arraychess
Alex Pavlovich
Alex Pavlovich

Reputation: 76

Make new Multidimensional Array in Test class

I am working on a chess game, but I do not know how can I make a test class and in that test class create a new Array and test methods from ChessClass.

My Chess Table class with a method that makes a random move import java.util.Random;

public class Chess {

    boolean s [][] = new boolean[8][8];
    Knight kn;
    Random r = new Random();

    public void RandStart(){
        kn = new Knight(r.nextInt(), r.nextInt());
        s [kn.getX()][kn.getY()] = true;
    }


    public void print(){
        for(int i = 0;i < s.length;i++){
            for(int j = 0;j < s[i].length;j++){
                System.out.println(s[i][j]);
            }   
        }
    }



}

The only thing I do not know is how to make it work in the test class I get an error and I can not use the methods from Chess class

public class Test {

    public static void main(String[] args){
        Chess m = null;
        m = new Chess[5][5];
        m.RandStart();
    }
}

Thanks in advance

Upvotes: 0

Views: 412

Answers (3)

Luke Melaia
Luke Melaia

Reputation: 1468

In your main method your are trying to assign a two dimensional Chess array to a normal Chess object.

public class Test {

    public static void main(String[] args){
        Chess m = new Chess();
        m.RandStart();
    }
}

Should work to fix your problem.

Also I suggest you change RandStart() to randStart() good programming practice is all.

Upvotes: 2

Ann Addicks
Ann Addicks

Reputation: 925

Welcome to Stack Overflow!

It looks like you want to be able to dynamically set the array size when testing. You can create two constructors to instantiate your array:

boolean s [][] = new boolean[8][8];
Knight kn;
Random r = new Random();

public Chess() {
  s = new boolean[8][8];
}

public Chess(boolean s[][]) {
  this.s = s;
}

This way your test can pass in the array in the constructor. And just a couple of nits, use a better variable name than 's' and tests do not usually use main. Check out Junit https://github.com/junit-team/junit/wiki/Getting-started

Upvotes: 1

QuakeCore
QuakeCore

Reputation: 1926

I see that you are trying to create a new Chess object, but you are far from doing so because m = new Chess[5][5]; is the syntax for creating a multidimensional array and not an object. however here is the syntax for creating new Object of the class chess.

Chess m = new Chess();

Upvotes: 0

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