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Kode Program

The Java program demonstrates matrix addition and multiplication using two-dimensional arrays. It defines methods for adding and multiplying matrices, and prints the results of these operations. The output shows the results of adding two 3x3 matrices and multiplying a 3x2 matrix with a 2x2 matrix.

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sulestari162006
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27 views3 pages

Kode Program

The Java program demonstrates matrix addition and multiplication using two-dimensional arrays. It defines methods for adding and multiplying matrices, and prints the results of these operations. The output shows the results of adding two 3x3 matrices and multiplying a 3x2 matrix with a 2x2 matrix.

Uploaded by

sulestari162006
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Kode program:

import java.util.Arrays;

public class DuaDimensi {


public static void main(String[] args) {

// pertambahan matrix

int [][] matrix_a = {


{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
};

int [][] matrix_b = {


{11, 12, 13},
{14, 15, 16},
{17, 18, 19},
};

printArray (matrix_a);
printArray (matrix_b);

int [][] hasilTambah = tambah (matrix_a, matrix_b);

printArray (hasilTambah);

// perkalian matrix

int [][] matrix_c = {


{1, 2},
{3, 4},
{5, 6},
};

int [][] matrix_d = {


{11, 12},
{13, 14},
};

int [][] hasilKali = kali (matrix_c, matrix_d);

printArray (hasilKali);
}

private static int [][] kali (int[][] matrix_1, int [][] matrix_2) {
int baris_1 = matrix_1.length;
int kolom_1 = matrix_1[0].length;

int baris_2 = matrix_2.length;


int kolom_2 = matrix_2[0].length;

//jika a . b maka jumlah baris akan mengikuti matrix a, kolom


//akan mengikuti kolom b

int [][] hasil = new int[baris_1][kolom_2];


int buffer;
for (int i = 0; i < baris_1; i++) {
for (int j = 0; j < kolom_2 ; j++) {
buffer = 0;
for (int k = 0; k < kolom_1; k++) {
buffer += matrix_1 [i] [k] * matrix_2 [k] [j];
}
hasil [i][j] = buffer;
}
}
return hasil;
}

private static int [][] tambah (int [][] matrix_1, int[][] matrix_2) {
int baris_1 = matrix_1.length;
int kolom_1 = matrix_1[0].length;

int baris_2 = matrix_2.length;


int kolom_2 = matrix_2[0].length;

int [][] hasil = new int [baris_1] [kolom_1];

if (baris_1 == baris_2 && kolom_1 == kolom_2) {

for (int i = 0; i < baris_1; i++) {


for (int j = 0; j < kolom_1; j++) {
hasil [i][j] = matrix_1 [i][j] + matrix_2 [i][j];
}
}
} else {
System.out.println("jumlah baris atau kolom tidak sama");
}

return hasil;
}

private static void printArray (int [][] dataArray) {


int baris = dataArray.length;
int kolom = dataArray[0].length;

for (int i =0; i < baris; i++) {


System.out.print("[");
for (int j = 0; j < kolom; j++) {
System.out.print(dataArray[i][j]);

if (j < (kolom - 1)) {


System.out.print(",");
} else {
System.out.print("]");
}
}
System.out.print("\n");
}
System.out.print("\n");
}
}
Hasil:
[1,2,3]
[4,5,6]
[7,8,9]

[11,12,13]
[14,15,16]
[17,18,19]

[12,14,16]
[18,20,22]
[24,26,28]

[37,40]
[85,92]
[133,144]

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