Tableau en java

import java.util.Scanner;

public class LauncherTwoDimArrayInput {
    private int[][] data;
    private int rowMax;
    private int colMax;

    public LauncherTwoDimArrayInput(int row, int col) {
        this.rowMax = row;
        this.colMax = col;
        this.data = new int[this.rowMax][this.colMax];
    }

    public void fill() {
        Scanner in = new Scanner(System.in);
        for (int row = 0; row < this.data.length; row++) {
            for (int col = 0; col < this.data[row].length; col++) {
                System.out.println("Entrer un entier :");
                this.data[row][col] = in.nextInt();
            }
            System.out.println();
        }
    }

    @Override
    public String toString() {
        String ret = "";

        for (int row = 0; row < this.data.length; row++) {
            for (int col = 0; col < this.data[row].length; col++) {
                ret += data[row][col];
            }
            ret += '\n';
        }

        return ret;
    }

    public static void main(String[] args) {
        LauncherTwoDimArrayInput launcherTwoDimArrayInput = new LauncherTwoDimArrayInput(2, 3);
        launcherTwoDimArrayInput.fill();
        System.out.println(launcherTwoDimArrayInput.toString());
    }
}