Java Interview Programs

Strings:

1.) Print Duplicates of an array with one Loop statement?



package com.java.testing;

import java.util.HashSet;
import java.util.Set;

class MyClass
{
public static Set<Integer> commonNumbers = new HashSet<>();

public Integer digits;

public MyClass(Integer digits) {
this.digits=digits;
}

@Override
public int hashCode() {
return 0;
}

@Override
public boolean equals(Object obj) {
if(obj instanceof MyClass)
{
if(this.digits.equals(((MyClass)obj).digits))
{
commonNumbers.add(((MyClass)obj).digits);
return true;
}
}
return false;
}
}

public class ObenStringQuestion {

public static void main(String[] args){

int[] mobileno = new int[]{1,8,8,8,8,8,8,1,4,2,8,2,1,1,6,2};

Set<MyClass> xx = new HashSet<>();

for(int i=0;i<mobileno.length;i++)
{
xx.add(new MyClass(mobileno[i]));
}

for (MyClass object : xx) {

System.out.println(object.digits);
}

System.out.println(MyClass.commonNumbers);
}

}