Class and main method
Description
A class groups Java code.
Explanation
main is the entry point for a simple command-line program.
Example
public static void main(String[] args) { }← Chapter 2 — Core Syntax & Data
4. Java Program Structure & Output
mixed
Description
A Java application usually starts in the main method. Statements inside its braces run from top to bottom unless control flow changes that order.
System.out.println displays a value followed by a new line. Use it often while learning to inspect what your program is doing.
Subtopics
Printing text
Description
Output helps communicate results.
Explanation
println adds a line break; print does not.
Example
System.out.println("Score: 92");Explanation
Java is case-sensitive: System and system are different names. A semicolon ends most statements, while braces define a block of related statements.
Example
public class OutputDemo {
public static void main(String[] args) {
System.out.println("Aditi's score: 92");
System.out.print("Keep learning ");
System.out.println("Java!");
}
}Key points
- main is an application entry point.
- println adds a new line.
- Java is case-sensitive.