Java包。 每个文件不能使用多个软件包

Question

I am a beginner programmer for the FRC team 1310.I use Java in the Netbeans IDE. I was trying to incorporate certain classes. There is a package for FRC that is called edu.wpi.first.wpilibj.templates , it allows us to use speed controllers and sensors for our robot. I want to import java and javax classes along with the edu.wpi.first.wpilibj.templates package on the same file. i need this for Japplets to make it interactive. I also need this for the URL function as I need to extract images from an AXIS camera.

How do I do this?

Help is really needed.

Answer 1

Use import instead of package . My guess is you have multiple lines that start with the word package at the top of your file. To use classes from another package you import them.

package com.myPackage.whatever;

import java.io.*;
import javax.whatever.you.Want;
import edu.wpi.first.wpilibj.templates.*;

Answer 2

Your question doesn't really make sense.

To import multiple packages just put multiple import statements at the top of your file...

If you mean you need to INHERIT multiple parent classes from one class then you can't do that. Java only supports single inheritance. You need to use composition (create multiple classes, each inheriting one of the things you want, then have one single class containing all those).