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    Running a Java program from the Windows Command Prompt (CMD) is straightforward once Java is installed and configured. Below are the essential steps to get your Java code compiled and executed.

    1. Verify Java Installation

    • Open CMD (Win + R, type cmd, press Enter).

    • Check Java runtime:

    java -version
    コピーしました。

    • Check Java compiler:

    javac -version
    コピーしました。

    If either command fails, install the Java Development Kit (JDK) and set up the PATH environment variable to include the JDK’s bin directory (e.g., C:\Program Files\Java\jdk-21\bin) .

    2. Write and Save Your Java Program

    • Open Notepad and write your code:

    public class HelloWorld {
    public static void main(String[] args) {
    System.out.println("Hello, World!");
    }
    }
    コピーしました。

    • Save it as HelloWorld.java in a folder (e.g., C:\JavaPrograms). Ensure the filename matches the public class name .

    3. Compile the Program

    • In CMD, navigate to your file location:

    cd C:\JavaPrograms
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    • Compile using:

    javac HelloWorld.java
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    This generates a HelloWorld.class file if there are no syntax errors .

    4. Run the Program

    How to Run a Java Program in the Comm…

    In this blog, we will explore the step-by-step process of running a Java program in the CM…

    https://www.javaspring.net/blog/how-to-run-java-program-in-cmd
    How do I compile a Java program in CMD?
    To compile a Java program in the CMD, follow these steps: Open the Command Prompt: On Windows, you can press Win + R, type cmd, and press Enter. Navigate to the Directory: Use the cd command to navigate to the directory where your Java source file is located. For example, if your file is in the C:\Users\YourName\JavaProjects directory:
    javaspring.net
    Stack Overflow
    https://stackoverflow.com/questions/16137713/how-
    cmd - How do I run a Java program from the command line on Windows ...
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      使用例
      C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin
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