Code library

Beginner Java exercises

Read these Beginner Java snippets line by line — each one comes with a written breakdown of what the code does and why.

30 snippetsBrowse all Java snippets in the library →

Java · Beginner

Variables and Primitive Data Types

In Java, every variable must have a declared data type. 'int' is used for whole numbers, 'String' for text, and 'double' for decimal numbers.

syntaxdatatypes

Open snippet →

Java · Beginner

Defining and Calling Methods

Methods are reusable blocks of code. 'void' means the method does not return a value, and parameters allow you to pass data into the method.

functionssyntax

Open snippet →

Java · Beginner

Conditional Logic with If-Else

The 'if' statement allows you to execute code only if a specific condition is true. The 'else' block provides an alternative if the condition is false.

controlflowsyntax

Open snippet →

Beginner Java exercises

Variables and Primitive Data Types

Defining and Calling Methods

Conditional Logic with If-Else

Basic Class and Object Creation

Iterating with For Loops

The Switch Statement

String Length and Concatenation

Basic Exception Handling

Iterating with While Loops

Declaring and Accessing Arrays

Variables and Data Types

Basic Conditional Logic

The For Loop

Defining a Simple Method

Basic Class and Object

Working with Arrays

The While Loop

Class Inheritance

Common String Methods

Interfaces

Method Overloading

Java Enums

The Final Keyword

The Static Keyword

The Do-While Loop

The Modulus Operator (%)

The Ternary Operator

Reading User Input with Scanner

Primitive Data Types

The If-Else Statement