Netbeans cannot find java.io.InputStream

Question

事实上，他找不到java.io.

识别import java.io.*; import java.io.IOException;

，但当我尝试InputStream = this.getClass().getResourceAsStream("users.xml");，我得到以下错误:

C:UserscpantaziuDocumentsNetBeansProjectsurlsrcmainjavacommkyongcommoncontrollerFailRegisterController.java:[120,12]找不到符号符号:变量InputStream.

Tools -> Java platform ses my jdk 1.6.

为什么我得到这个?

Answer 1

你必须分配一个引用变量:

InputStream ref= this.getClass().getResourceAsStream("users.xml");

Answer 2

必须为变量命名:

InputStream is = this.getClas()...

Answer 3

import java.awt.image.BufferedImage;
    import java.io.IOException;
    import java.io.InputStream;
    import javax.imageio.ImageIO;
    /**
     *
     * @author mbarb
     */
    public class LoadSave {
    
        public static BufferedImage GetPlayerAtlas(){
            BufferedImage img = null;
            InputStream is = 
    LoadSave.class.getResourceAsStream("Res/player2.png");
        try {
            img = ImageIO.read(is);
        } catch (IOException e) {
            e.printStackTrace();
        }//try catch .close() 
        return img;
        }
     }

 

我在上面的代码中遇到了同样的问题。

i just get this:

Exception in thread "main" java.lang.IllegalArgumentException: input == null!
        at java.desktop/javax.imageio.ImageIO.read(ImageIO.java:1358)
        at Utilities.LoadSave.GetPlayerAtlas(LoadSave.java:19)
        at Entities.Player.loadAnimations(Player.java:102)
        at Entities.Player.<init>(Player.java:29)
        at com.mycompany.platformgame.Game.initClasses(Game.java:32)
        at com.mycompany.platformgame.Game.<init>(Game.java:21)
        at com.mycompany.platformgame.PlatformGame.main(PlatformGame.java:7)
Command execution failed.