Muhammad Nur Ikshan Zahardjil - 18108042 | UAS SISTEM INFORMASI TRILOGI

Topsis.java

import java.lang.Math.*;
import java.math.RoundingMode;
import java.text.DecimalFormat;

public class Topsis {
	public static void main(String[] args) {
		/*
		K1 BENEFIT : SUDAH (2) // BELUM (1)
		K2 BENEFIT : CLUSTER 1 (3) // CLUSTER 2 (2) // CLUSTER 3 (1)
		K3 COST    : >30 (4) // 21-30 (3) // 11-20 (2) // <11 (1)
		K4 COST    : SUDAH (2) // BELUM (1)
		----
		0[ 2 3 2 2 ]
		1[ 1 2 2 2 ]
		2[ 1 3 1 1 ]
		3[ 2 3 1 1 ]
		4[ 2 2 1 1 ]
		5[ 1 2 1 2 ]
		6[ 1 1 1 1 ]
		7[ 2 1 1 1 ]
		8[ 2 1 1 1 ]
		9[ 1 1 1 1 ]
		----
		BOBOT        : 0.4 // 0.3 // 0.1 // 0.1
		COST BENEFIT : 1 // 1 // -1 // -1
		*/

		// deklarasi variabel
		DecimalFormat df = new DecimalFormat("0.000");	
		df.setRoundingMode(RoundingMode.UP);					
		int[][] mtx = new int[10][4];
		double[][] mtx_keputusan = new double[10][4];
		double[][] mtx_normalisasi = new double[10][4];
		double[] rij = new double[4];
		double[] bobot = new double[]{0.4, 0.3, 0.2, 0.1};
		int[] costben = {1, 1, -1, -1};
		double[] max_ben = new double[4];
		double[] max_cost = new double[4];		
		int tmp = 0;

		// inisialisasi matrix keputusan
		mtx[0][0] = 2; mtx[0][1] = 3; mtx[0][2] = 2; mtx[0][3] = 2;
		mtx[1][0] = 1; mtx[1][1] = 2; mtx[1][2] = 2; mtx[1][3] = 2;
		mtx[2][0] = 1; mtx[2][1] = 3; mtx[2][2] = 1; mtx[2][3] = 1;
		mtx[3][0] = 2; mtx[3][1] = 3; mtx[3][2] = 1; mtx[3][3] = 1;
		mtx[4][0] = 2; mtx[4][1] = 2; mtx[4][2] = 1; mtx[4][3] = 1;
		mtx[5][0] = 1; mtx[5][1] = 2; mtx[5][2] = 1; mtx[5][3] = 2;
		mtx[6][0] = 1; mtx[6][1] = 1; mtx[6][2] = 1; mtx[6][3] = 1;
		mtx[7][0] = 2; mtx[7][1] = 1; mtx[7][2] = 1; mtx[7][3] = 1;
		mtx[8][0] = 2; mtx[8][1] = 1; mtx[8][2] = 1; mtx[8][3] = 1;
		mtx[9][0] = 1; mtx[9][1] = 1; mtx[9][2] = 1; mtx[9][3] = 1;

		// membuat nilai rij
		for (int y = 0; y < mtx[0].length; y++) {
			for (int x = 0; x < mtx.length; x++) {
				tmp += Math.pow(mtx[x][y],2);
			}; rij[y] = Math.sqrt(tmp); tmp = 0;
		}		

		// membuat matrix normalisasi terbobot & mencari ideal benefit cost
		for (int x = 0; x < mtx.length; x++) {
			for (int y = 0; y < mtx[0].length; y++) {
				mtx_keputusan[x][y] = mtx[x][y] / rij[y];
				mtx_normalisasi[x][y] = (mtx_keputusan[x][y] * bobot[y] * costben[y]);		
			};
		}

		// display matrix final
		System.out.println("matrix normalisasi terbobot\n--");
		for (int x = 0; x < mtx.length; x++) {
			System.out.print("[ ");
			for (int y = 0; y < mtx[0].length; y++) {
				System.out.print(df.format(mtx_normalisasi[x][y])+" ");
			}; System.out.println("]");
		}		
	}
}