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    When working on Java projects with multiple classes, you can compile them efficiently using the javac command without relying on build tools like Maven or Gradle. Here are the most common and effective approaches.

    Using Wildcards

    Step 1: Navigate to your project’s source directory.

    cd /path/to/project/src
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    Step 2: Compile all .java files in the current directory:

    javac *.java
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    Step 3: For package structures, specify the output directory with -d:

    javac -d ../out com/example/*.java
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    If you have multiple sub-packages:

    javac -d ../out com/example/*.java com/example/utils/*.java
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    This method is quick for small to medium projects with a few packages.

    Using Argument Files

    Step 1: Generate a file containing all .java file paths. On Linux/macOS:

    find ./src -type f -name "*.java" > sources.txt
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    On Windows:

    dir src /b /s *.java > sources.txt
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    Step 2: Compile using the argument file:

    javac -d ./out @sources.txt
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    This is ideal for large projects with many packages, as it avoids long command lines.

    Using Recursive Globbing (Bash 4+)

    How to run multiple classes in Java 11?
    For multiple classes, you should put them into a Java ARchive file (JAR) file. You include a manifest file that siecifies which class has a main method to be used for launching. As you discovered, Java 11 gained a convenience feature where a single source-code file with a main method can be compiled and executed by simply calling java.
    stackoverflow.com
    Baeldung
    https://www.baeldung.com/javac-compile-classes-directory
    Compile All Java Classes in Directory Structure with javac
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  1. LabEx
    https://labex.io › tutorials › java-how-to-co…この結果を翻訳する

    How to compile Java files with multiple classes | LabEx

    This tutorial provides comprehensive guidance on managing and compiling Java source files containing multiple classes, helping programmers streamline their …

  3. Stack Overflow
    https://stackoverflow.com › questionsこの結果を翻訳する

    Compiling Multiple Classes (Console) in Java - Stack Overflow

    2012年3月1日 · I have 4 Classes for my project, they are (titleScreen, credits, storyScreen, and camapaign) respectively, since they are connected to each other, I don't know how to get it compiled.

    How to compile multiple Java files together?2021年7月31日
    Compiling multiple packages using the command line in Java
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  4. Baeldung
    https://www.baeldung.com › javac-compile-classes-directoryこの結果を翻訳する

    Compile All Java Classes in Directory Structure with javac

    In some special circumstances, we don’t have a third-party build tool installed, such as Ant or Maven. And, we still need to compile a project with lots of packages and classes. In this tutorial, we’re going to use the javaccommand to accomplish this task with different scenarios.
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    • 公開日: 2022年3月28日
  5. javathinking.com
    https://www.javathinking.com › blog › compiling-multiple...この結果を翻訳する

    How to Compile Multiple Java Packages from the Command ...

    2026年1月16日 · This guide will walk you through compiling multiple Java packages using javac (the Java compiler). We’ll cover project setup, handling dependencies, troubleshooting common errors, …

  6. codingtechroom.com
    https://codingtechroom.com › question › -compile-multiple...この結果を翻訳する

    How to Compile Multiple Java Classes Using the ...

    Learn how to compile multiple Java classes efficiently using the JavaCompiler API with detailed examples and common pitfalls.

  7. YouTube
    https://www.youtube.com › watchこの結果を翻訳する

    How to Compile Several Classes in One Java File

    2025年10月6日 · Learn how to compile multiple classes within a single Java file. This guide will walk you through the process step by step, ensuring your code runs smoothly....

  8. Medium
    https://medium.com › @AlexanderObrego…この結果を翻訳する

    Executing Multiple Java Classes in a Single Program

    2025年3月16日 · Learn how Java handles multiple class definitions, how the compiler processes them, how the JVM loads them, and how the main () method …

  9. OneCompiler
    https://onecompiler.com › javaこの結果を翻訳する

    MultiClass.java - Java - OneCompiler

    ksr Users can add dependencies in the build.gradle file and use them in their programs. When you add the dependencies for the first time, the first run might be a little slow as we download the …

  10. Baeldung
    https://www.baeldung.com › java-compile …この結果を翻訳する

    Compile Multiple Java Source Files Using the Command …

    2024年1月8日 · We can use the javac tool to compile source files in Java. We look at how to use it for multiple source files and how to control which libraries are …

  11. labex.io
    https://labex.io › tutorials › java-how-to-manage-multiple...この結果を翻訳する

    How to manage multiple classes compilation | LabEx

    This tutorial provides comprehensive guidance on managing multiple class compilations in Java, exploring essential techniques for developers to effectively organize, compile, and structure Java …

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