Program to perform sorting and to display largest and second largest elements in the list

/* Program to perform sorting and to display largest and second largest elements in the list */

import java.io.DataInputStream;   // to load DataInputStream class          

class P1
{
    static void bubble(int x[ ], int n)
    {
           int hold, j, pass;
           int switched = 1;
           for(pass=0; pass<n-1 && switched==1; pass++)
           {    // Outer loop controls the number of passes
                switched = 0;
                 // Initially no interchange have been made on this pass
                for(j=0; j<n-pass-1; j++)
                // Inner loop governs each individual pass
                           if (x[j] > x[j+1])
                            {
                                 //Interchange elements if they are out of order
                                  switched = 1;
                                  hold=x[j];
                                  x[j] = x[j+1];
                                  x[j+1] = hold;
                         }          //end if
              }                    // end for
    }    // end bubble function

    public static void main(String args[ ])
    {
        int i, n=0;
        int x[] = new int[20];
        DataInputStream in = new DataInputStream(System.in);
        try
        {
            System.out.print(" Enter numbers of elements :");
            n = Integer.parseInt(in.readLine());
            System.out.println(" \n Enter Numbers in any order : ");
            for(i=0; i<n; i++)
            {
                      System.out.print("\n Element["+i+"] = ");
                      x[i] = Integer.parseInt(in.readLine());
            }
        }
        catch(Exception e) {  System.out.println("I/O Error");   }

        bubble(x,n);

        System.out.println(" \n \nSorted Elements in Ascending order are : ");
        for(i=0; i<n; i++)
                  System.out.println(" \n Element["+i+"] = "+x[i]);

        // Displays the largest and 2nd largest element from sorted list
        System.out.println(" \n Largest Element is : "+x[n-1]);
        System.out.println(" \n Second largest Element is : "+x[n-2]);
       
    }
}