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Java Simple Program

Requirements for Writing a Simple Java Program

To write a simple Java program, you need:

  1. JDK: Install JDK, which includes the Java compiler (javac) and tools for compiling and running Java programs.
  2. Text Editor or IDE: Choose a text editor (e.g., Notepad, Sublime Text) or an IDE (e.g., Eclipse, IntelliJ IDEA) for writing Java code.
  3. Java Source Code: Write Java code using a text editor or IDE. Programs typically include a main class with a main method as the entry point.
  4. Compilation: Compile Java source code using javac to generate bytecode files (.class).
  5. Execution: Run compiled bytecode using the Java Runtime Environment (JRE) by specifying the main class with the java command.

Example Simple Java Program

Here's an example of a simple Java program:

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

 

Explanation

  • Class Declaration: The SimpleProgram class is declared using the public access modifier.
  • Main Method: The main method is the entry point of the Java program. It is declared as public static void main(String[] args). This method is called when the program is executed.
  • Print Statement: Inside the main method, System.out.println("Hello, Java!"); is used to print "Hello, Java!" to the console.

Summary

This simple Java program prints "Hello, Java!" to the console when executed. It demonstrates the structure of a basic Java program with a main method and a print statement.

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