I’m having a problem in excel while using Apache POI. I can read across rows, but sometimes I’m in a situation where I would like to read a particular column only. So is it possible to read any particular column like only the ‘A’ column only or the column ‘C’ only. I’…
Is there a Netflix video library? [closed]
Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 10 years ago. Improve this question Is there a Java library to download movie data from Netflix? I’m not just talking about the …
AntBuilder can’t find package org.junit
I added some unit tests to a test directory (parallel to my src directory) in my project in Eclipse using the “JUnit test case” new file dialogue. I have two builders, the default Java Builder and an AntBuilder I added. The Java Builder continues to work, but the AntBuilder fails in Eclipse. When …
How to create 8-bit PNG from BufferedImage?
I have a Java program that creates composite png images that contain only black pixels and 100% transparent pixels. I am trying to reduce the size of these composites as much as possible and I notice that ImageIO.write always outputs 32 bit PNG’s. I would like to instead save them as 8-bit considering t…
Why are local variables thread safe in Java
I was reading multi-threading in Java and I come across this Local variables are thread safe in Java. Since then I have been thinking How/Why local variables are thread safe. Can somebody please let me know. Answer When you create a thread it will have its own call stack created. Two threads will have two sta…
How to get last month/year in java?
How do I find out the last month and its year in Java? e.g. If today is Oct. 10 2012, the result should be Month = 9 and Year = 2012. If today is Jan. 10 2013, the result should be Month = 12 and Year = 2012. Answer Your solution is here but instead of addition you need to
Syntax error on token “;”, “{” expected after this token
Just a simple class calls a class that prints an array. I get a syntax error in Eclipse. I also get an error that I don’t have a method called Kremalation. Answer You have code (which is not declaring a variable and/or initializing it) ouside a method, which is: In Java, code MUST reside inside a method…
amazon s3 upload file time out
I have a JPG file with 800KB. I try to upload to S3 and keep getting timeout error. Can you please figure what is wrong? 800KB is rather small for upload. Error Message: Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed. HTTP Status…
Java storing two ints in a long
I want to store two ints in a long (instead of having to create a new Point object every time). Currently, I tried this. It’s not working, but I don’t know what is wrong with it: And I’m getting the int values like so: Answer y is getting sign-extended in the first snippet, which would overw…
Cannot construct instance of – Jackson
I am using Jackson and I’m having problems, when I try to deserialize an Object I get the following error: I am having problems in the attribute: Could anyone help me? Answer You cannot instantiate an abstract class, Jackson neither. You should give Jackson information on how to instantiate MyAbstractCl…