M_3 Arr Nomer 2 Matrix

//Soal Nomer 2 Matrix
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
package javaapplication6;

public class Rumus {

    private int M1[][];
    private int M2[][];
    private int Jwb[][];

    public int[][] getM1() {
        return M1;
    }

    public void setM1(int[][] M1) {
        this.M1 = M1;
        M1 = null;
    }

    public int[][] getM2() {
        return M2;
    }

    public void setM2(int[][] M2) {
        this.M2 = M2;
        M2 = null;
    }

    public void sout(String a) {
        System.out.println(a);
        a = null;
    }

    public void sout(int M1[][]) {
        int i, j;
        for (i = 0; i < M1.length; i++) {
            for (j = 0; j < M1[i].length; j++) {
                System.out.print(M1[i][j] + " ");
            }
            System.out.println();
        }
        M1 = null;
    }

    public int[][] getCara() {
        return Jwb;
    }

    public void setCara(int[][] M1, int[][] M2) {
        Jwb = M1;
        int i, j;
        for (i = 0; i < M1.length; i++) {
            for (j = 0; j < M1[i].length; j++) {
                Jwb[i][j] = M2[i][j] + M1[i][j];
            }
        }
        M1 = null;
    }

    public void del() {
        M1 = null;
        M2 = null;
    }
}


//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++





import javaapplication6.Rumus;

public class matrix {

    public static void main(String[] args) {
        Rumus R = new Rumus();
        int[][] M1 = {
            {1, 2},
            {3, 4}};

        int[][] M2 = {
            {2, 4},
            {6, 8}};

        System.out.println("Nilai Matriks A");
        R.setM1(M1);
        R.sout(R.getM1());

        System.out.println("Nilai Matriks B");
        R.setM2(M2);
        R.sout(R.getM2());

        System.out.println("Hasil dari penjumlahan Matriks A dan B : ");
        R.setCara(M1, M2);
        R.sout(R.getCara());

        R.del();
        M1 = null;
        M2 = null;
        R = null;
    }
}