How to run and compile java program?

问题

I am compiling a simple program

class Test {
     public static void main(String[] args) {
        System.out.println("Hello");
     }
}

I typed in command prompt java Test.java But it did not work

Could not find or load main class Test.java

Im not using any IDE

Where should i place the program file on my computer

Thank you

回答1:

You cannot directly run a java source file. You need to compile it first using javac:

javac Test.java

Then you get a .class file that you can run:

java Test

来源：https://stackoverflow.com/questions/11265630/how-to-run-and-compile-java-program