Converting A String To Hexadecimal In Java
I am trying to convert a string like “testing123” into hexadecimal form in java. I am currently using BlueJ. And to convert it back, is it the same thing except backward?
java
RecyclerView onClick
As the API’s have radically changed, It wouldn’t surprise me if you were to create an OnClickListener for each item. It isn’t that much of a hassle though. In your implementation of RecyclerView.Adapter<MyViewHolder>, you should have: The onClick method:
How to pause my Java program for 2 seconds
You can use: or Please note that both of these methods throw InterruptedException, which is a checked Exception, So you will have to catch that or declare in the method. Edit: After Catching the exception, your code will look like this: Since you are new, I would recommend learning how to do exception handling once you … Read more
STS launch error – Java was started but returned exit code=13
So I installed STS a while back now onto my Windows 7 64-bit machine, every time I try run STS I get the attached Java exit code=13 error below. I don’t have have Eclipse installed into my machine, I mention this because every time I have tried to Google this error code threads about the … Read more
Simplest way to read JSON from a URL in Java
This might be a dumb question but what is the simplest way to read and parse JSON from URL in Java? In Groovy, it’s a matter of few lines of code. Java examples that I find are ridiculously long (and have huge exception handling block). All I want to do is to read the content … Read more
java sort using anonymous class
Finally, I modified the sort function in this manner to get sorted data.
“The system cannot find the file C:\ProgramData\Oracle\Java\javapath\java.exe”
I am on JDK 8u25 on Windows 8, and I am experiencing a problem with my Java installation. I can run javac perfectly fine, but running java produces this error message: How do I fix this? I think the problem has to do with my environment variables. The important variables, as I have set them, … Read more
How to fix “error: bad operand types for binary operator ‘||’ ” in java
To answer your question about the while loop condition directly (are the two conditions equivalent?): No, they aren’t equivalent, but it’s only a small change needed. The following two conditions are equivalent by DeMorgan’s Law. So basically you have to add a ! before your second while loop condition to make them equivalent (assuming it really was a … Read more
Eclipse error, “The selection cannot be launched, and there are no recent launches”
Eclipse can’t work out what you want to run and since you’ve not run anything before, it can’t try re-running that either. Instead of clicking the green ‘run’ button, click the dropdown next to it and chose Run Configurations. On the Android tab, make sure it’s set to your project. In the Target tab, set … Read more
Java double.MAX_VALUE?
Double.MAX_VALUE is the maximum value a double can represent (somewhere around 1.7*10^308). This should end in some calculation problems, if you try to subtract the maximum possible value of a data type. Even though when you are dealing with money you should never use floating point values especially while rounding this can cause problems (you will … Read more