membuat refleksif,simetris dan transitif pada java

import java.io.*;

class relasihimpunan

{

private static BufferedReader input = new BufferedReader (new InputStreamReader(System.in));

public static void main(String[ ] args) throws Exception

{

System.out.print(”masukkan banyaknya himpunan A:”);

int x=Integer.parseInt(input.readLine());

int himpA [] = new int[x];

for (int i=0; i

{

System.out.print(”masukkan elemen A ke-”+(i+1)+” : “);

String a=input.readLine();

himpA[i]=Integer.parseInt(a);

}

System.out.print(”A={”);

for (int i=0; i

{

System.out.print(himpA[i]);

if (i!=x-1)

System.out.print(”,”);

}

System.out.println(”}”);

System.out.println();

System.out.println(”jenis relasi”);

System.out.println(”====================”);

System.out.println(”1.Reflektif sederhana”);

System.out.println(”2.Simetris sederhana”);

System.out.println(”3.Transitif sederhana”);

System.out.println(”====================”);

System.out.print(”masukkan jenis relasi yang diinginkan: “);

String b=input.readLine();

int pil=Integer.parseInt(b);

System.out.println();

switch (pil)

{

case 1:

//membuat relasi reflektif himpunan A

System.out.print(”Relasi R={”);

for (int i=0; i

{

for (int j=0; j

{

if (himpA[i]==himpA[j])

{

System.out.print(”(”+himpA[i]+”,”+himpA[j]+”)”);

if (j!=x-1)

System.out.print(”,”);

}

}

}

System.out.println(”}”);

System.out.println();

break;

case 2 :

//membuat relasi simetris himpunan A

System.out.print(”Relasi R={”);

for (int i=0; i

{

for (int j=0; j

{

if (himpA[i] !=himpA[j])

{

System.out.print(”(”+himpA[i]+”,”+himpA[j]+”)”);

if (j!=x-1)

System.out.print(”,”);

}

}

if (i!=x-1)

System.out.print(”,”);

}

System.out.println(”}”);

System.out.println();

break;

case 3 :

//membuat relasi transitif

System.out.print(”Relasi R={”);

for (int i=0; i

{

for (int j=0; j

{

if (himpA[i] !=himpA[j])

{

if (i%2!=0)

{

if (j%2==0)

{

System.out.print(”(”+himpA[i]+”,”+himpA[j]+”)”);

if (j!=x-1)

System.out.print(”,”);

}

}

else

{

if (j%2!=0)

{

System.out.print(”(”+himpA[i]+”,”+himpA[j]+”)”);

if (j!=x-1)

System.out.print(”,”);

}

}

}

}

}

System.out.println(”}”);

System.out.println();

break;

default:

System.out.println(”pilihan tak ada dalam daftar!!”);

break;

}

}

}