Running into java.lang.NullPointerException Here

Question

I am quite new to programming, at least on the level that I am currently attempting. I've been creating a character class for use in a 2D fighting game engine that will hold a BufferedImage arraylist of frames of character animation. Everything in the program compiles and runs fine, except that I keep running into a NullPointerException in the following code:

    public void addImage(String image) throws IOException
  {
    this.character.add(ImageIO.read(new File(image)));
  }

I am not sure exactly how to fix this, as my low level of general Java knowledge (I only have 1 2 semester high school class by a shoddy teacher under my belt) prevents me from correctly understanding the descriptions on how to fix the problem on various websites. Could somebody describe how to solve this in a clean and concise way? Thank you!

First step is to read the stacktrace (and post it here). Second step is to use a debugger. — akuzminykh, May 30 '20 at 04:32
Most likely, [you're trying to use `File` in a way that isn't supported](https://stackoverflow.com/questions/16570523/getresourceasstream-returns-null). — chrylis -cautiouslyoptimistic-, May 30 '20 at 04:37

score 0 · Answer 1 · answered May 30 '20 at 04:35

0

NullPointerException is thrown when you try to pass an object ref that has a null value.. I would look to make sure the file you are passing it actually getting read.. try breaking it down then consolidating more after it is functional.. maybe store your file in a variable firs then add that.. if it works then go with it, if it doesn't and you still get the null, look to your new File

answered May 30 '20 at 04:35

bjastski

54
3

1

Please use the following code : I'm not able gave answer - question is closed public void addImage(String image) throws IOException { File f = new File(image); if(f.exists() && !f.isDirectory()) { // check file directory is exist or not this.character.add(ImageIO.read(new File(image))); } } – Sridhar Karuppusamy May 30 '20 at 04:42

Running into java.lang.NullPointerException Here

1 Answers1