Input and Output in Java - Scanner Class & System.out

Java Output

We use System.out.println() to print text to the console.

System.out.println("Hello World"); // Prints on new line
System.out.print("Hello"); // Prints on same line

Java Input (Scanner Class)

The Scanner class is used to get user input.

import java.util.Scanner;
public class InputExample {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        System.out.print("Enter name: ");
        String name = scanner.nextLine();
        
        System.out.print("Enter age: ");
        int age = scanner.nextInt();
        
        System.out.println("Hello " + name + ", you are " + age);
        
        scanner.close(); // Good practice to close scanner
    }
}

Scanner Methods

• nextBoolean() - Reads a boolean
• nextByte() - Reads a byte
• nextDouble() - Reads a double
• nextFloat() - Reads a float
• nextInt() - Reads an int
• nextLine() - Reads a String (line)
• nextLong() - Reads a long
• nextShort() - Reads a short