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JDK (Java Development Kit)

  • The Java Compiler (javac)
  • The Java Archiving Tool (jar)
  • The Java Debugging Tool (jdb)
  • A complete Java Runtime Environment (JRE), for running Java programs

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IDE (Integrated Development Environments)

  • Visual Studio Code
  • IntelliJ IDEA
  • Eclipse
  • NetBeans
  • glot.io
  • replit

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Contoh

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Say Hello to the World

Hello.java
public class Hello {
    public static void main(String[] args) {
        // generate some simple output
        System.out.println("Hello, World!");
    }
}

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Compile & Run

  • Compile javac Hello.java
  • Run java Hello Proses

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Displaying Strings

public class Hello {
    public static void main(String[] args) {
        // generate some simple output
        System.out.println("Hello, World!"); // first line
        System.out.println("Hello, World!"); // 2nd line
    }
}

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New Line

System.out.println("Text");
System.out.print("Text\n");

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Special Characters

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escape sequence

\nnew line
\ttab
”double quote
\backslash

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Comments

public class Hello {
    public static void main(String[] args) {
        // generate some simple output
        System.out.print("Hello, "); // first line
        System.out.println("World!"); // first line
    }
}

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Code Formatting

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