Binary Search in Server Side and Client Side

Server Side:

import java.net.*;
import java.io.*;
import java.util.*;

public class ServerBinSearch
{
 public static void main(String[] arg) throws Exception
 {
  ServerSocket ss = new ServerSocket(8500);
  Socket s = ss.accept();
  System.out.println("Connection OK");  
  DataInputStream din = new DataInputStream(s.getInputStream());
  DataOutputStream dout = new DataOutputStream(s.getOutputStream());

  int a[];
  int n;
  n = Integer.parseInt(din.readUTF());
  System.out.println("Got Size As: " + n);
  a = new int[n];
  for(int i = 0; i < a.length; i++)
  {
   a[i] = Integer.parseInt(din.readUTF());
   System.out.println("Getting Value As: " + a[i]);
  }
  int key = Integer.parseInt(din.readUTF());
  System.out.println("Got Key As: " + key);
  int flag = binSearch(a, n, 0, a.length-1, key);

  dout.writeUTF("" + flag);
  ss.close();
  s.close(); 
 }

 public static int binSearch(int a[], int n, int low, int high, int key)
 {
  while(low <= high) {
   int mid = (low+high)/2;
   if (a[mid] == key) {
    return 1;
   }
   else if (key > a[mid]) {
    low = mid + 1; 
   }
   else {
    high = mid - 1;
   }
  }
  return 0;
 }
}

Client Side:

import java.io.*;
import java.net.*;
import java.util.*;

public class ClientBinSearch
{
 public static void main(String[] args) throws Exception
 {
  int a[];
  int n = 0;
  
  System.out.println("Enter The Size Of The Array: ");

  Scanner sc = new Scanner(System.in);
  n = sc.nextInt();

  a = new int[n];
  for (int i = 0; i < a.length; i++) {
   a[i] = sc.nextInt();
  }

  Socket s = new Socket("localhost", 8500);
  DataInputStream din = new DataInputStream(s.getInputStream());
  DataOutputStream dout = new DataOutputStream(s.getOutputStream());
  dout.writeUTF("" + n);

  for (int i = 0; i < a.length; i++) {
   dout.writeUTF("" + a[i]);
  }
  
  System.out.println("Find Key? :");
  int key = sc.nextInt();
  dout.writeUTF("" + key);

  String found = din.readUTF();
  
  if (found.equals("1")) {
   System.out.println("Found!");
  }
  else {
   System.out.println("Not Found!");
  }
  s.close();
 }
}