write a programme that printout the similar elements of the array?

Question

let we have and array int [x]={1,2,3,4,5,6,7,8,9,3,6,7} then the output should be 3,6,7.
i want to check out different methodology to doing this.

Answer 1

import java.util.HashSet;

public class Program
{
public static void main(String[] args) {
int x[] = { 1,2,3,4,5,6,7,8,9,3,6,7 };

HashSet set = new HashSet();

for(int i: x){
if(set.contains(i)){
System.out.println(i);
}else{
set.add(i);
}
}
}
}

Answer 2

import java.util.Arrays;

public class Program
{
public static void main(String[] args) {
int[] x = {1,2,3,4,5,6,7,8,9,3,6,7};
Arrays.sort(x);
for (int i = 0; i < x.length; i++){
if(x[i] > x[0])
if(x[i] == x[i - 1])
System.out.println(x[i]);
}
}
}

Off the top of my head, that's what I came up with :)

Answer 3

you don't have to use built in function like Arrays.sort(x).

Answer 4

Never said you did, you were checking for methodology, that's the method I chose :)

Answer 5

That's why i mention for furthee answer dude.. and nice way

Answer 6

@WPimpong

for(int i: x){
if(!set.add(i))
System.out.println(i);
}