How to Generate Random Numbers in Java between Range - Example Tutorial

In software development and programming world we often needs to generate random numbers, some time random integers in a range e.g. 1 to 100 ...

How to convert List of Integers to int array in Java - Coding Tips

So, you have a List of Integers and you want to convert them into int array? Yes you read it write, not on Integer array but int array . Th...

Java Mistake 3 - Using "==" instead of equals() to compare Objects in Java

In this part of Java programming mistakes, we will take a look on another common pattern, where programmers tend to use "==" oper...

Java Program to Find Sum of Digits in a Number using Recursion - Interview Question

Recently this question to asked was one of my reader, which inspired me to write this tutorial. There was usual check to solve this problem ...

Difference between valueOf and parseInt method in Java

Both valueOf and parseInt methods are used to convert String to Integer in Java, but there are subtle difference between them. If you look...

How to increment decrement date by days in Java - Tutorial example

While working in Java projects, we often needs to increment or decrement date e.g. adding one days to current date to get tomorrow's dat...

Difference between trunk, tags and branches in SVN or Subversion source control system

SVN or Subversion is one of the popular source control system used in Java world for source code management. There are lot of source control...

How to Reverse Array in Java - Int and String Array Example

This Java tips is about, how to reverse array in Java, mostly primitive types e.g. int , long , double and String arrays. Despite of Java’...

How to create Immutable Class and Object in Java - Tutorial Example

Writing or creating immutable classes in Java is becoming popular day by day, because of concurrency and multithreading advantage provided b...

2 ways to combine Arrays in Java – Integer, String Array Copy Example

There are multiple ways to combine or join two arrays in Java, both for primitive like int array and Object e.g. String array. You can even ...

How to Swap Two Numbers without Temp or Third variable in Java - Interview Question

How to swap two numbers without using temp or third variable is common interview question not just on Java interviews but also on C and C++ ...

How to convert XMLGregorianCalendar to Date to XMLGregorianCalendar in Java - Example Tutorial

There are several ways to convert XMLGregorianCalendar to Date in Java. You can convert XMLGregorianCalendar to either java.util.Date or j...

How to add leading zeros to Integers in Java – String left padding Example Program

From Java 5 onwards it's easy to left pad Integers with leading zeros when printing number as String. In fact, You can use same techniqu...

5 JSTL Core IF Tag Examples in JSP - Tutorial

<c:if>   or if tag of JSTL core tag library in JSP is one of the most versatile and useful tag. JSTL if tag allows you to test for ...

How to convert JSON String to Java object - Jackson Example

JSON, stands for JavaScript object notation, is a light weight text or string representation of object and quickly becoming a popular data e...

How to disable submit button in HTML JavaScript to prevent multiple form submission

Avoiding multiple submission of HTML form or POST data is common requirement in Java web application. Thankfully, You can prevent multiple s...

5 ways to check if String is empty in Java - examples

String in Java is considered empty if its not null and it’s length is zero. By the way before checking length you should verify that String ...

How to check if a Number is Positive or Negative in Java - Interview Question

Write a Java program to check if a number is positive or negative is one of the popula r Java coding interview question , it may look easy b...

Java Best Practices to Follow while Overloading Method and Constructor

Method overloading in Java needs to be use carefully. Poorly overloaded method add not only add confusions among developers who use that but...

How to compare Arrays in Java – Equals vs deepEquals Example

java.util.Arrays class provides equals() and deepEquals() method to compare two Arrays in Java. Both of these are overloaded method to c...