Why Isn't 'javac' Recognized in My Windows Command Prompt?

Correcting the "javac is not recognized" Error on Windows

Problem: Java programs fail to compile with the error "javac is not recognized as an internal or external command."

Solution:

1. Ensure Java is Installed Correctly

• Verify that you have installed the JDK, not just the JRE.
• Use the exe installer rather than the zip file to avoid potential path issues.

2. Find the Java Path

• Navigate to the installation directory of Java (e.g., C:Program FilesJavajdk1.8.0_321), followed by the bin directory.
• Highlight the address bar to copy the path (without quotes).

3. Open Environment Variables

• Search for "environment variable" in the Start Menu or use the control sysdm.cpl,3 command.
• Select the Environment Variables button.

4. Clean Up PATH

• Remove any other Java paths or the C:ProgramDataOracleJavajavapath entry.
• Remove paths for software no longer installed.

5. Add Java Path to PATH

• Place the new Java path in the PATH (system) variable.
• Ensure there are no extra spaces or missing semicolons.

6. Set JAVA_HOME

• Create (if necessary) and set the JAVA_HOME (system) variable to the path of the Java directory without the bin folder (e.g., C:Program FilesJavajdk1.8.0_321).

7. Close and Re-open Console/IDE

• Exit and restart Command Prompt or your Java IDE to apply the new environment variables.

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