Java Hello, World!

Hello, Java!

Iniciando com a linguagem Java!

Instalação

Linux

sudo apt update && \
sudo apt upgrade && \
sudo apt install default-jre &&\
sudo apt install default-jdk

Windows

1. Download

2. Denfinir alias no .bashrc

alias java="/c/'Program Files'/java/jdk-16.0.2/bin/java.exe"

Código

import java.util.Scanner;

public class Hello {
    static String userName = "";
    // Execute on file call
    public static void main(String[] args) {
        getName();
        toGreet();
    }
    public static void getName() {
        // Create a Scanner Object
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter username: ");

        // Read user input
        String userName = sc.next();
        sc.close();
    }
    public static void toGreet() {
        System.out.println(String.format("Hello, World! %s", userName));

    }
}

Execução

Compilar:

javac Hello.java

Executar:

java Hello.java