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Getting the error “Java.lang.IllegalStateException Activity has been destroyed” when using tabs with
I have an application that consists of using ActionBarSherlock in tab mode.I have 5 tabs and the content of each tab is handled using fragments. For tab2 though, I have a fragment the xml file of which holds a ViewPager element which in turn has some fragment pages. When I initially start the applic...
How do I programmatically determine operating system in Java?
I would like to determine the operating system of the host that my Java program is running programmatically (for example: I would like to be able to load different properties based on whether I am on a Windows or Unix platform). What is the safest way to do this with 100% reliability?
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What's wrong with Java Date & Time API? [closed]
Very often I come across negative feedback on Java Date and other date-time-related classes. Being a .NET developer, I cannot fully (without having used them) understand, what's actually wrong with them.
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How do I set environment variables from Java?
How do I set environment variables from Java? I see that I can do this for subprocesses using ProcessBuilder . I have several subprocesses to start, though, so I'd rather modify the current process's environment and let the subprocesses inherit it.
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java.lang.IllegalStateException: The specified child already has a parent
I am using fragments, when I instantiate a fragment the first time it it. but the second time I got this exception. I couldn't find the line where I got the error?
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How do I make my string comparison case insensitive?
I created a Java program to compare two strings:
12 Answers
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Java executors: how to be notified, without blocking, when a task completes?
... submit these to ExecutorService. Or, see below for a mechanism built into Java 8.
class CallbackTask implements Runnable {
private final Runnable task;
private final Callback callback;
CallbackTask(Runnable task, Callback callback) {
this.task = task;
this.callback = callback;
}...
Does a method's signature in Java include its return type?
Does the method signature in a Java class/interface include its return type?
14 Answers
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How can I pad an integer with zeros on the left?
How do you left pad an int with zeros when converting to a String in java?
16 Answers
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What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
...add that for multidimensional arrays that might have an arbitrary shape in Java, the nested loops should check for the relevant subarray length: for (int nestedIndex = 0; nestedIndex < array[outerIndex].length; nestedIndex++) { ... array[outerIndex][nestedIndex] ... }.
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