Java

/* Java program for Merge Sort */
class MergeSort 
{ 
	// Merges two subarrays of arr[]. 
	// First subarray is arr[l..m] 
	// Second subarray is arr[m+1..r] 
	void merge(int arr[], int l, int m, int r) 
	{ 
		// Find sizes of two subarrays to be merged 
		int n1 = m - l + 1; 
		int n2 = r - m; 

		/* Create temp arrays */
		int L[] = new int [n1]; 
		int R[] = new int [n2]; 

		/*Copy data to temp arrays*/
		for (int i=0; i<n1; ++i) 
			L[i] = arr[l + i]; 
		for (int j=0; j<n2; ++j) 
			R[j] = arr[m + 1+ j]; 


		/* Merge the temp arrays */

		// Initial indexes of first and second subarrays 
		int i = 0, j = 0; 

		// Initial index of merged subarry array 
		int k = l; 
		while (i < n1 && j < n2) 
		{ 
			if (L[i] <= R[j]) 
			{ 
				arr[k] = L[i]; 
				i++; 
			} 
			else
			{ 
				arr[k] = R[j]; 
				j++; 
			} 
			k++; 
		} 

		/* Copy remaining elements of L[] if any */
		while (i < n1) 
		{ 
			arr[k] = L[i]; 
			i++; 
			k++; 
		} 

		/* Copy remaining elements of R[] if any */
		while (j < n2) 
		{ 
			arr[k] = R[j]; 
			j++; 
			k++; 
		} 
	} 

	// Main function that sorts arr[l..r] using 
	// merge() 
	void sort(int arr[], int l, int r) 
	{ 
		if (l < r) 
		{ 
			// Find the middle point 
			int m = (l+r)/2; 

			// Sort first and second halves 
			sort(arr, l, m); 
			sort(arr , m+1, r); 

			// Merge the sorted halves 
			merge(arr, l, m, r); 
		} 
	} 

	/* A utility function to print array of size n */
	static void printArray(int arr[]) 
	{ 
		int n = arr.length; 
		for (int i=0; i<n; ++i) 
			System.out.print(arr[i] + " "); 
		System.out.println(); 
	} 

	// Driver method 
	public static void main(String args[]) 
	{ 
		int arr[] = {12, 11, 13, 5, 6, 7}; 

		System.out.println("Given Array"); 
		printArray(arr); 

		MergeSort ob = new MergeSort(); 
		ob.sort(arr, 0, arr.length-1); 

		System.out.println("\nSorted array"); 
		printArray(arr); 
	} 
} 
/* This code is contributed by Rajat Mishra */

// Main function that sorts arr[l..r] using 
	// merge() 
	void sort(int arr[], int l, int r) 
	{ 
		if (l < r) 
		{ 
			// Find the middle point 
			int m = (l+r)/2; 

			// Sort first and second halves 
			sort(arr, l, m); 
			sort(arr , m+1, r); 

			// Merge the sorted halves 
			merge(arr, l, m, r); 
		} 
	} 

Quote:

I am using BufferedReader for reading a response from the server.

while((String line = br.readLine()) != null)
System.out.println(line);

Above is my code. When I run I am getting only few lines but not all the lines.

If br completes reading a line then it should return null and come out of the loop. That is also not happening. It is just waiting for the line to read.

Any idea why this is happening ?

package testPackage;

import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Properties;

public class Main {

	public static void main(String[] args) throws Exception {
		// TODO Auto-generated method stub
				  
		    try {
		      Class.forName("com.mysql.jdbc.Driver");
		      Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/student?useSSL=true","root","success");  
		      System.out.print("Database is connected !");
			  con.close();				
	}
		    catch(Exception e)
		    {
		    	System.out.println(e.getMessage());
		    	throw e;
		    }
		    	
		    }

}

serverSocket = new ServerSocket(4554);
serverRunning = true;
while (serverRunning) {
    socket = serverSocket.accept();
    ObjectOutputStream dataOut = new ObjectOutputStream(socket.getOutputStream());
    ObjectInputStream dataIn = new ObjectInputStream(socket.getInputStream());
    System.out.println("Done 1");

    String string = dataIn.readUTF();
    System.out.println("Done 2");

    int number = dataIn.readInt();
    System.out.println("Done 3");

    dataOut.writeUTF("String from server");
    System.out.println("Done 4");

    dataOut.writeInt(1);
    System.out.println("Done 5");

    System.out.println(string + " | " + number);
}

Socket socket = new Socket("localhost", 4554);
ObjectOutputStream dataOut = new ObjectOutputStream(socket.getOutputStream());
ObjectInputStream dataIn = new ObjectInputStream(socket.getInputStream());
System.out.println("Done 1");

dataOut.writeUTF("String from client");
System.out.println("Done 2");

dataOut.writeInt(2);
System.out.println("Done 3");

String string = dataIn.readUTF();
System.out.println("Done 4");

int number = dataIn.readInt();
System.out.println("Done 5");

socket.close();
System.out.println(string + " | " + number);

Quote:

When should i use and what? Where as i know we can connect MQ queue and JMS queue by using JMS API.