How to Compile a Java File Using javac

javac command is used to compile a .java file. You can directly run javac in command prompt if the environment variable is set correctly.

How to compile a java file using javac command.

To compile a program, execute the Java compiler by specifying the name of the file. For this, you have to type this command at the command prompt.

Example:

c:\jdk\appdemo> javac Testfile.java

Output:

Testfile.java compile successfully.

javac compiler creates a class file. This file holds the bytecode of the program which contains the instructions to be executed by the Java interpreter.