Today, I'm discovering the problem of the package, I have tried it for a long time, I haven't said that it is clear, and I bought the book is too bad.
No way, continue learning, please teach the master to understand the meaning of the package, maybe just understand some of them.
First create a folder, named Test
Create a file in the catalog of Test CLIENT.JAVA
//Client.java
Package test;
Public Class Client
{
Public client () {}
Public void output ()
{
System.out.println ("this is package test");
}
}
Then go to the root directory to establish Dome.java
//Testmain.java
// Import test.client;
Import test. *;
Class Demo
{
PUBLIC DEMO () {}
Public static void main (string args [])
{
Client img = new client ();
Img.output ();
}
}
This is compiled with javac * .java
Run success. .
I feel some things, I am very happy, I understand the usage of IMPORT.
Pointing the package test in the package
This is to explain that this file is under Test's directory to facilitate program calls.
Import test. * is also an introduction of all defined classes in the TEST package
Import test.client; this is also a class that separates the definition in the CLIENT.
Learn Java in a few days, you can understand these, most of them are guided by master help
Thank you for your heart ~~
