Java Tutorials

Java Substring: A How-To Guide

The Java substring() method returns a portion of a particular string. This method accepts the start and end index values of the characters you would like to retrieve from a string. The original string on which substring() is applied is…

How to Use Enum in Java

A Java enum is a data type that stores a list of constants. You can create an enum object using the enum keyword. Enum constants appear as a comma-separated list within a pair of curly brackets. An enum, which is…

Java Stack Class

A Java stack is a last-in, first-out data structure. The first item removed from a stack is the item last added to the stack. A stack data structure adds new items to the end of the stack. Java stacks extend…

Java Hello World: A Guide for Beginners

Welcome to the Java programming language. The first task any beginner should take on is the “Hello, World!” script. In this task, you have to print a message to the console. This is another way of saying make a line…

Java Compilers: A Step-By-Step Guide

Five to ten years ago, learning Java wasn’t as accessible as it is now. Back then, you had to download a Java Development Kit (JDK) that contained the compiler and interpreter to run on your machine. Now there are a…

Learn to Sort ArrayList in Java

How to Sort an ArrayList in Java When you’re working with an ArrayList in Java, you may encounter a situation where you want to sort an ArrayList in ascending or descending order. For instance, you may have a list of…

Fibonacci Java: A Guide

A Guide to the Fibonacci Java Algorithm The Fibonacci Sequence is a sequence where the next number is calculated by calculating the sum of the previous two numbers. This sequence has its claim to fame in mathematics. It also appears…

Java User Input and Scanner Class: A Step-By-Step Guide

The Java Scanner class is used to read user input. Scanner is built into the java.util package, so no external libraries are needed to use it. While Scanner is the most common class used to retrieve input, Java’s BufferedReader, InputStreamReader,…

Java String replace() Method: A Step-By-Step Guide

The Java string replace() method will replace a character or substring with another character or string. The syntax for the replace() method is string_name.replace(old_string, new_string) with old_string being the substring you’d like to replace and new_string being the substring that…

How to Convert a Char to String in Java

To convert a char to a string in Java, the toString() and valueOf() methods are used. The toString() and valueOf() methods are both used to convert any data type to a string. For converting a char to a string, they…

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