Compiler error in java

Common Error Messages on Microsoft Windows Systems

'javac' is not recognized as an internal or external command, operable program or batch file

If you receive this error, Windows cannot find the compiler (javac).

Here's one way to tell Windows where to find javac. Suppose you installed the JDK in C:\jdk1.8.0. At the prompt you would type the following command and press Enter:

C:\jdk1.8.0\bin\javac HelloWorldApp.java

If you choose this option, you'll have to precede your javac and java commands withC:\jdk1.8.0\bin\ each time you compile or run a program.

Class names, 'HelloWorldApp', are only accepted if annotation processing is explicitly requested

If you receive this error, you forgot to include the.java suffix when compiling the program. Remember, the command is javac HelloWorldApp.java not javac HelloWorldApp.

Common Error Messages on UNIX Systems

javac: Command not found

If you receive this error, UNIX cannot find the compiler,javac.

Here's one way to tell UNIX where to find javac. Suppose you installed the JDK in/usr/local/jdk1.8.0. At the prompt you would type the following command and press Return:

/usr/local/jdk1.8.0/javac HelloWorldApp.java

Note: If you choose this option, each time you compile or run a program, you'll have to precede your javacand java commands with /usr/local/jdk1.8.0/. To avoid this extra typing, you could add this information to your PATH variable. The steps for doing so will vary depending on which shell you are currently running.

Class names, 'HelloWorldApp', are only accepted if annotation processing is explicitly requested

If you receive this error, you forgot to include the.java suffix when compiling the program. Remember, the command is javac HelloWorldApp.java not javac HelloWorldApp.