Java Basics

The main method, primitive types, strings and control flow in Java.

Beginner

public class Hello {
    public static void main(String[] args) {
        int count = 3;
        double voltage = 3.3;
        String name = "UPEEC";
        for (int i = 0; i < count; i++) {
            System.out.println(name + " " + voltage);
        }
    }
}

Primitive types: byte, short, int, long, float, double, char, boolean. Everything else is an object. Compare strings with .equals(), not ==.

Spotted a mistake or want to add detail? Suggest an improvement — Content Contributors' edits are reviewed by editors before they go live.

Discussion (0)