Java Learning 2--helloworld (writing the first Java program)

Write

Create a Helloworld.java file in your own working file directory (such as the CLASSPATH path configured in the previous article), write the following code, and save

1  Public class HelloWorld 2 {3      Public Static void main (String [] args) 4     {5         System.out.println ("Helloword"); 6     }7 }

(Note that the file name (HelloWorld) is identical to the class name)

Compile

Javac file name. Java (Compile command)

When the compilation is complete, the corresponding. class file is generated

Execute Java file name (Execute command)

(Note that the runtime does not need to be followed.) class input, only the class file name is required)

Java Learning 2--helloworld (writing the first Java program)