An Awesome program: Common elements in two arrays

import java.io.*;
class common {
 public static void main()throws IOException {
 BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
 System.out.println("Enter the size of the first array");
 int n=Integer.parseInt(br.readLine());
 int Arr1[]=new int[n];
 System.out.println("Enter the values");
 for(int i=0;i<n;i++)
 Arr1[i]=Integer.parseInt(br.readLine());
 System.out.println("Enter the size of the second array");
 int o=Integer.parseInt(br.readLine());
 int Arr2[]=new int[o];
 System.out.println("Enter the values");
 for(int i=0;i<o;i++)
     Arr2[i]=Integer.parseInt(br.readLine());
 boolean flag=false;
 for(int i=0;i<n;i++)
 {
    for(int j=0;j<o;j++)
    {
    if(Arr1[i]==Arr2[j])
     {
       System.out.print("THE COMMON ELEMENTS ARE-"+Arr1[i]+"\t");
       flag=true;
     }
    }
 } 
 System.out.println();
 if(flag==false)
    System.out.println("THERE ARE NO COMMON ELEMENTS");
 }
}