import java.util.Arrays;

public class Demo
{
    public static void main(String[] args)
    {  
        Integer[] arr = new Integer[4];
        
        arr[0] =  4;
        arr[1] =  2;
        arr[2] =  5;
        arr[3] =  1;
        
        for ( int i = 0; i < arr.length; i++ )
            System.out.print( arr[i] + " ");
        System.out.println();
   
        Arrays.sort( arr );  
   
        for ( int i = 0; i < arr.length; i++ )
            System.out.print( arr[i] + " ");
        System.out.println();
    }
}