*? Hello, landlord, are you using DOS command line? I didn't know what was going on until you told me the java command you entered.
*
*? 1. Compile the source file first: javac.HelloWorld.java.
*? 2. Run the class file: java? HelloWorld
*
*? Note: Class names are capitalized, and many words are capitalized.
*/
Public? Class? HelloWorld{
Public? Static electricity Invalid? main(String[]？ args){
system . out . println(" hello world ")；
}
}