Online Java Compiler

Java example code

Arrays, loops and Scanner input in one small program.

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    String name = scanner.hasNextLine() ? scanner.nextLine().trim() : "Anku";
    int[] scores = {82, 91, 76, 88};
    int total = 0;

    for (int score : scores) {
      total += score;
    }

    System.out.println("Hello, " + (name.isEmpty() ? "Anku" : name) + "!");
    System.out.println("Average: " + (total / (double) scores.length));
  }
}

Sample output

Hello, Mira!
Average: 84.25

Common Java errors

• Class name mismatch: Keep the public class named Main for online compiler compatibility.
• Missing semicolon: Java statements usually end with a semicolon.
• Scanner waits for input: Provide sample stdin when the code reads with Scanner.