Compiling a Java program is very easy after JDK installation. Following are the steps −
Open a command prompt window and go to the directory where you saved the java program. Assume it's C:\.
Type 'javac MyFirstJavaProgram.java' and press enter to compile your code. If there are no errors in your code, the command prompt will take you to the next line (Assumption: The path variable is set).
The file is compiled and you can see MyFirstJavaProgram.class file generated in the same folder.