Java program to check given number is prime number or not

Similar Questions:

• Prime Numbers Java Example
• Print prime numbers between 1 and given number using for loop

• //check to see if the number is prime
• boolean isPrime = true;
•                         for(int j=2; j < 10 ; j++){
•                                
•                                 if(10 % j == 0){
•                                         isPrime = false;
•                                         break;
•                                 }
•                         }
•                         // print the number
•                         if(isPrime)
•                                 System.out.print(i + " ");

Binary search tree implementation using java

Queue(FIFO) implementation using Java

A queue is a collection that is based on the first-in-first-out (FIFO) policy.

• dequeue() - get an item from the queue.
• enqueue() - insert item into the queue.

Stack(LIFO) implementation in java (linkedlist)

A stack is a collection that is based on the last-in-first-out (LIFO) policy.

• push() -  push an item into stack.
• pop() - get an item and remove it from the top.

Java program to reverse number

Java programming source code

1. class ReverseNumber
2. {
3.    public static void main(String args[])
4.    {
5.       System.out.println("Enter the number to reverse");
6.       int n=54321,
7.       int reverse = 0;
8. 
   
9.       while( n != 0 )
10.       {
11.           reverse = reverse * 10;
12.           reverse = reverse + n%10;
13.           n = n/10;
14.       }
15. 
    
16.       System.out.println("Reverse number is "+reverse);
17.    }
18. }

Tree Preorder Traversal using Java

/*
Node is defined as

class Node {
    int data;
    Node left;
    Node right;
}
*/

Linked list java implementation

Definition: A linked list is a recursive data structure that is either empty (null) or a reference to a node having a generic item and a reference to a linked list.

Structure:

Node record:

class Node<Item>

{

Item item;

Node next;

}

Arithmetic expression evaluation in java

Computing the value of arithmetic expressions like this one:
                                               ( 1 + ( ( 2 + 3 ) * ( 4 * 5 )

Which means multiply 4 by 5, add 3 to 2, multiply the result, and then add 1, you get the value 101.
But how does the Java system do this calculation?

We can address the essential ideas by writing a Java program that can take a string as input (the expression) and produce the number represented by the expression as output.

Dijkstra's Two stack Algorithm for Expression Evaluation


public class ExpressionEvaluation
{
public static void main(String args[]){

Stack<String> ops = new Stack<String>();

Stack<Double> ops = new Stack<Double>();

Insert a node at the head of a linked list using Java

/*
  Insert Node at the beginning of a linked list
  head pointer input could be NULL as well for empty list
*/
/*
  Node is defined as
  class Node {
     int data;
     Node next;
  }
*/

Node Insert(Node head,int x) {
    Node node=new Node();
    node.data=x;
    node.next=head;
    return node;
}

Java program to check if a number is armstrong or Not

Similar Question:

     Print List of Armstrong number.


Solution:


class armstrong
{
public static void main(String args[])
{
int s=0,n=153,m,d;
m=n;
while(n>0)

notepad application in java

Similar Question:

• Notepad application using java source code
• TextEditor java program

Complete Program:

import java.awt.*;

import java.awt.event.*;

import java.awt.datatransfer.*;

import java.applet.*;

import java.io.*;

import javax.swing.*;

import javax.swing.undo.*;

import java.util.Hashtable;

class UndoableTextArea extends TextArea implements StateEditable

 {

Java command line arguments importing from a file

Similar Question:

•        Exporting java output to a different file
•       How to write console output to a file

Solution:

Syntex: 

 

How to highlight a grid row or column in AngularJs

   

columnDefs: [
      { field: 'name',cellClass: function(grid, row, col, rowRenderIndex, colRenderIndex) {
           if (grid.getCellValue(row,col) === 'xyz') {
            return 'blue';
          }
        }},
      { field: 'address',
        cellClass: function(grid, row, col, rowRenderIndex, colRenderIndex) {
          if (rowRenderIndex===3) {
            return 'blue';
          }
        }
      }
    ]

GIT Commands Tutorial

• Github Commands

1.  How to get a local Copy

                               (Branch 

                                Name)

             git clone -b master <git master url )>

            (EXP-  git clone -b master https://github.com/xxx/xxx.git)

Java program to get class path file by name

           

URL resource = myClass.class.getResource("/PmlConfig.xml");          
System.out.println((new File(resource.toURI())).getAbsolutePath()));

Arraylist vs Linked list time complexity

• Time complexity of Arraylist and  LinkedList 

Time comparison of add(), get(), and remove();

How to download a file using a Java REST service ?

Related Question:
     How to zip a folder?
     AngularJs / JavaScript to download a file using web service.


Solution:

 @GET
    @Path("/report/download/file/{filename : .+}")
    @Produces(MediaType.APPLICATION_OCTET_STREAM)
    public Response downloadFilebyPath(@PathParam("filename")  String fileName) {

when to implement finalize method in java

Lot of time JVM takes care of all  garbage collector object.

If your java program hold any system resources like (Calendar, File, Thread, Display properties many more) that time you should implement finalize method.

java restful web services @path regular expression

1
         The following example shows how regular expression could be used with the @Path annotation.
       @Path("users/{username: regular expression}")

         Example:
        @Path("users/{username: [a-zA-Z][a-zA-Z_0-9]}")

        following URL:   http://example.com/users/hello

2
                 The @PathParam annotation example

        @Path("/users/{username}")
        public class User {

        @GET
         @Produces("text/xml")
         public String getUser(@PathParam("username") String              userName) {
        System.out.println(userName);
        }
        }

Inserting a Node at the Tail of a Linked List

/*
  Insert Node at the end of a linked list
  head pointer input could be NULL as well for empty list
  Node is defined as


  class Node {
     int data;
     Node next;
  }


*/

How to Iterating all the Elements of a Linked List in java

/*
  Print elements of a linked list

  class Node {
     int data;
     Node next;
  }

 */
 
void Print(Node head) {
   while(head != null){
       System.out.println(head.data);
       head = head.next; 
   }
}

Java program to Search sub array inside an array

Same Problems:
       Java 2D array Grid Search
       Search sub array inside a array
       Grid Search
       multidimensional array search

Example:
  m1 = 1 2  5  5 6 5 0
           5 2 10 5 6 5 4
           9 2 34 0 2 9 6
           1 2  5  5 6 5 6
           8 2 11 5 6 1 3
           9 2 34 0 2 9 2

search array :
                m2 :  0 2 9
                         5 6 5
                         5 6 1

Solution:

Merging two Sorted Linked List using java

Merge two linked list that are aleady sorted and return a new sorted list.

Implement this method :

1. Node MergeLists(Node list1, Node list2){
2. // your code here
3. }

Solution:

java.lang.Exception: Error getting all Data! - No bean named 'transactionManager' is defined  com.Parameters(Resource.java:46)
 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)  sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)  java.lang.reflect.Method.invoke(Method.java:601)  org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)  org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:151)  org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:172)  org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:152)  org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:104)  org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:384)  org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:342)  org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:101)  org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:271)  org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)  org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)  org.glassfish.jersey.internal.Errors.process(Errors.java:315)  org.glassfish.jersey.internal.Errors.process(Errors.java:297)