Lesson 1 of 9

Your first Java program

Java is a strict, well-structured language behind banking systems, large enterprise software and Android apps, and much of ERP software such as Oracle is built with it. Many MIS programmes teach it in the first programming course.

JAVA

public class Main {
    public static void main(String[] args) {
        System.out.println("Hello, MyMisPal!");
        System.out.println(3 + 4);
    }
}

Output

Hello, MyMisPal!
7

public class Main	All Java code lives in a class, named the same as the file: Main.java
public static void main	The entry point where execution starts
System.out.println	Prints and moves to a new line
;	Every statement ends with a semicolon
{ }	Start and end of every block

Java is compiled: write Main.java, compile with javac Main.java, run with java Main. You need a JDK (for example from adoptium.net) or an IDE such as IntelliJ IDEA or VS Code.

print stays on the same line; println moves to the next one:

JAVA · inside main

System.out.print("A");
System.out.print("B");
System.out.println();
System.out.println("C");

Output

AB
C

Same idea in both languages

Python

print("Hello, MyMisPal!")

Java

public class Main {
    public static void main(String[] args) {
        System.out.println("Hello, MyMisPal!");
    }
}