Problem:
How to write “Hello, world!” in Java?
Solution:
- Create a package for a class:
mkdir -p com/farenda/solved
- Create a file com/farenda/solved/HelloWorld.java with content:
package com.farenda.solved; public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, world!"); } }
- Create directory for compiled classes:
mkdir classes
- Compile source:
javac src/com/farenda/solved/HelloWorld.java -d classes
- Run compiled code:
java -cp classes com.farenda.solved.HelloWorld
Result:
Hello, world!