Core java

Learn about how to remove backslash from String in Java. backslash() is used as escape character in Java. For example it can be used to: Create special characters such as new line character \n, tab \t Write unicode characters like \u%04x. Ways to Remove Backslash from String in Java 1. Using replace() Method Use String’s […]

In this post, we wil see how to convert 0 to 1 and 1 to 0 in java. There are lots of ways to convert 0 to 1 and 1 to 0 in Java. Let’s go through them. Using Subtraction This is one of easiest solution to swap 0 to 1 and vice versa. Just […]

In this post, we will get unix timestamp in Java. As per wikipedia Unix time is a system for describing a point in time. It is the number of seconds that have elapsed since the Unix epoch, excluding leap seconds. The Unix epoch is 00:00:00 UTC on 1 January 1970. Unix time is standard way […]

This article discusses cases of returning an ArrayList in Java from a method. An ArrayList in Java is a collection of elements of the same data type under a single variable name. In different cases, you can return an ArrayList from a method in Java. These cases are as given below. Returning ArrayList from a […]

In this post, we will see how to convert Month name to number in Java. Please note that we will use first three letter of month name (First letter as capital) to convert it to Number. There are multiple ways to convert month name to number in java. Let’s go through. Using DateTimeFormatter and TemporalAccessor […]

Introduction In this article, we get a look on How to print a 2D or Two Dimensional array in java. Arrays are one of the most useful data structures when it comes to data storage. Arrays provide random access to the elements via their index basing which makes both accessing and storing the most efficient. […]

In this post, we will see how to count number of decimal places in java. A Double can not have exact representation, you need to convert it to String to count number of decimal places in Java. There are multiple ways to count number of decimal places in java. Let’s go through them. Using String’s […]

TL;DR To return empty Array in Java, you can use curly braces. [crayon-6a289ce38fbfb098601871/] or [crayon-6a289ce38fc01065248284/] 1. Introduction In this article, we will take a look on to How to return Empty array in java. We will look at different ways to achieve this with demonstrated working examples in detail. At first, let us have a […]

In this post, we will see how to fix IllegalArgumentException: Bound must be positive in java. You will generally get this exception while generating random numbers using Random.nextInt() method. If you pass bound as 0 or less than 0, then you will get the exception. Let’s understand with the help of example: [crayon-6a289ce3901f3330757114/] When you […]