Understanding Methods in Java

When you write a Java program, you quickly run into a problem — you end up writing the same lines of code over and over. Methods solve this. Think of a method as a named block of code that you write once and can run as many times as you want. What is a method? A method is a reusable block of instructions that performs a specific task. Instead of repeating code, you give that code a name and call it whenever you need it. Types of Methods in Java Understanding Predefined and User-defined methods using a real Calculator example. Java methods come in two flavors. Some are already built into Java — you just use them. Others you write yourself to solve your specific problem. Let's understand both using a Calculator program. 1. Predefined Methods These are methods that Java has already written for you. They live inside Java's built-in libraries. You don't need to define them — just call them directly. Look at this line inside our Calculator example: System . out . println ( a + b ); println()