Introduction - If you have any usage issues, please Google them yourself
The above code will be saved as a HelloWorld.java file, and then enter the CMD interface, switch to the HelloWorld.java file directory, use the javac HelloWorld.java compiler, if successfully compiled directory will appear under the HelloWorld.class file, which is called the bytecode file, or intermediate code file, the class file is the East, and then cross platform then, using the Java HelloWorld command will be able to see the results, case sensitive.