Java interview Program to find second Smallest number in an integer array by sorting the elements.

class SecondSmallestNumber{

public static void main(String args[])
{

int numbers[] = {6,3,37,12,46,5,64,21};

  Arrays.sort(numbers);

  System.out.println("Smallest Number: "+numbers[0]);
  System.out.println("Second Smallest Number: "+numbers[1]);

 }

}

Java interview Program to find second smallest number in an integer array without sorting the elements.
class SecondSmallestNumber{

int[] x ={10,11,12,13,14,6,3,-1};

        int small=x[0];

 for(int i=0;i<x.length;i++)
 {
        if(x[i]<small)
        {
        small=x[i];
        }
 }

   int sec_Small=x[0];

for(int i=0;i<x.length;i++)
 {
        if(x[i]<sec_Small && x[i]!=small)
        {
        sec_Small=x[i];
        }
  }

        System.out.println("Second Smallest Number: "sec_Small);
        }
}

Program to print prime numbers in java

public class primenumbers {

public static void main(String[] args) {

int num=50;
int count=0;

for(int i=2;i<=num;i++){

count=0;

for(int j=2;j<=i/2;j++){

if(i%j==0){
count++;
break;
}

}

if(count==0){

System.out.println(i);

}

}

}

}