An applet program to perform quick sort

import java.io.*;

class sort
{
      String str;
      int size,sortArr[];

      public void getdata()
      {
             System.out.print(\"Enter how many data you want to enter : \");
             System.out.flush();
             try{
                 BufferedReader obj=new BufferedReader(new 

InputStreamReader(System.in));
                 str=obj.readLine();
                 size=Integer.parseInt(str);
                 sortArr=new int[size];
                 for(int i=0;i<size;i++)
                   {
                       System.out.print(\"Enter element at \"+(i+1)+\"th 

position  :  \");
                       System.out.flush();
                       str=obj.readLine();
                       sortArr[i]=Integer.parseInt(str);
                   }
                }
            catch(Exception e)  {}
            QuickSort(sortArr,0,size-1);
      }

      public void  QuickSort(int sortArr[],int lb,int ub)
      {       
                int i,j,key,flag=0,temp;
                if(lb<ub)
                {
                   i=lb;
                   j=ub+1;
                   key=k[i];
                   while(flag!=1)
                     {
                         i++;
                         while(k[i]<key)
                              i++;
                        j--;
                        while(k[j]>key)
                              j--;
                        if(i<j)
                          {
                              temp=k[i];
                              k[i]=k[j];
                              k[j]=temp;
                           }
                        else
                          {
                             flag=1;
                             temp=k[lb];
                             k[lb]=k[j];
                             k[j]=temp;
                          }
                    }
                QuickSort(sortArr,lb,j-1)
                QuickSort(sortArr,j+1,ub);
            }
        }

    public void display()
    {
         System.out.println(\"\\nAfter Sorting\");
         for(int i=0;i<size;i++)
              System.out.println(sortArr[i]);
    }
}


class QuickSort 
{
    public static void main(String args[]) 
    {
          sort ob1=new sort();
           System.out.println(\"=====QUICK SORT=====\\n\");
            ob1.getdata();
            ob1.display();
    }
}