Java Programs

/**
 * string1[]={a,b,c}
 * string2[]={b,c,d}
 * o/p=2
 * if repeated elements are there count only once.
 */

package programs;

import java.util.Arrays;
import java.util.Set;
import java.util.TreeSet;

public class CountRepeatedElementsOnlyOnce {
public static void main(String[] args) {
int output;
String[] arr1 = { "a", "b", "c" };
String[] arr2 = { "b", "c", "d" };

Set<String> a = new TreeSet<String>(Arrays.asList(arr1));
Set<String> b = new TreeSet<String>(Arrays.asList(arr2));

a.retainAll(b);
output = a.size();

System.out.println("Repeated Elements is " + output);
}
}