Java

Compiler Commands

Compile Java source files with javac. Learn module compilation, annotation processing, classpath management, and debugging options for effective Java development.

8 commands

Pro Tips

Use 'javac -Xlint:all' to enable all compiler warnings and catch potential issues early.

Compile with '-g' flag to include debugging information for easier troubleshooting.

Use '-d' to specify output directory and keep compiled classes organized.

Common Mistakes

Ensure source and target versions match your deployment JRE to avoid compatibility issues.

Module path and classpath should not contain the same JAR to avoid split package errors.

Commands

Compile Java file

$ javac MyClass.java

Compile a single Java source file.

Compile with classpath

$ javac -cp lib/*:. MyClass.java

Compile with external JARs in the classpath.

Compile to output directory

$ javac -d target/classes src/*.java

Compile sources and output class files to a directory.

Compile with all warnings

$ javac -Xlint:all MyClass.java

Enable all compiler warnings for better code quality.

Compile for specific version

$ javac --release 17 MyClass.java

Compile targeting a specific Java version.

Compile with debugging info

$ javac -g MyClass.java

Include debugging information in class files.

Compile module

$ javac -d out --module-source-path src $(find src -name '*.java')

Compile Java modules from source path.

Show deprecation warnings

$ javac -deprecation MyClass.java

Show detailed deprecation warnings during compilation.