Technical answers from my Stack Overflow history, with source links and licenses.
Showing 29 of 59 answers tagged java
Exported May 9, 2026
Inner classes will be compiled and the class file will be ClassName$InnerClassName . See: https://stackoverflow.com/a/11388863/1048340 You need to escape the dollar sign character in Kotlin. The following will work:...
ImageIO.read(file) should return a BufferedImage . You can also use PixelGrabber to get a specific color. Example: ToolkitImage also has a method to get the BufferedImage but may return null: Why does ToolkitImage...
You can use ^[^ ]+ . Example: See: https://regex101.com/r/aZYgvC/1
Unless you are Chuck Norris or Jon Skeet, you shouldn't use RegEx to match HTML. I would suggest using Jsoup . Here is an example using the string from your question:
It looks like goBack(View) is most likely from an onClick setup in your layout XML. Since you aren't using the view, just pass null :
I've used Natty Date Parser for this. You can try it out here . It is available on maven central here . If you are using gradle: Example usage: Output: Sat Oct 10 20:51:10 PDT 2015 Sat Oct 10 20:51:10 PDT 2015 Fri Oct...
As commented previously, android.os.FileUtils has changed and the solution posted by Ashraf no longer works. The following method should work on all versions of Android (although it does use reflection and if a...
The outer try-block will still catch exceptions from the inner try-block. The inner try-block is there to make sure DaoUtils.closeStatement(callStmt); is invoked.
You currently have two Toolbar layouts in your Activity. You need to set the Toolbar using setSuppotActionBar(Toolbar) . Example:
If I understand correctly, you want the output to be like the second JSON array in your question. Changing where you loop should do the trick: I tested with the input you have. Here is the formatted JSON output:
Are you sure you are using the same jar in both projects? Android's org.json.JSONObject.toString(String) is different: JSON.toString(Object) : In your case this would not throw an exception on Android.
You should not be loading a WebView in a background thread; it needs to be loaded on the UI thread. I would add a listener to your WebView and when the URL is finished loading you can add your button.
Here is a method for getting a random color: Benefits: Get the integer representation which can be used with java.awt.Color or android.graphics.Color Keep a static reference to Random .
final It is used in the following three cases: If the final keyword is attached to a variable then the variable becomes constant i.e. its value cannot be changed in the program. If a method is marked as final then the...
You can get a random number between 6 and 10 like this: Here is an example to play a sound every 6 to 10 seconds: Just call playMySound(); in onCreate(Bundle) and toggle mKeepPlaying when you want to stop.
The code should be working fine as long as dt and days are correct. This gave me 12-18-2014:
Saving all the images in R.drawable is not the best idea. It would be better to save specific images instead of all of them. However, here is how you could save all the images as specified in R.drawable :
It is called JSON, not JSCON. The code you posted is JavaScript, not PHP. Here is an example of how you could read the JSON you provided with PHP: This will print each goalie's name.
A getter should not be static. I made some modifications. This should work:
On my device (HTC One M8) android.os.SystemClock is in /system/framework/framework3.jar. I believe framework is separated into multiple jars because of the 65k method limit on classes.dex. android.os.SystemClock may be...
It looks like an easy solution if this is the only String you are attempting to split. Something like this would work for the input String you provided in your question: You can use http://regexpal.com/ to help you in...
The appcompat themes remove the native ActionBar and use the support ActionBar. You need to change To You also need to change Base.Theme.AppCompat.Light to Theme.AppCompat.Light in your AndroidManifest. Please see this...
Does your class extend LinkedList ? If so, here is what I would do: It isn't a great idea to extend LinkedList. If you want an easy way to create a new LinkedList with elements use the following method:
If you post some code it would be helpful. However, having had issues with this in the past I know using postDelayed usually fixes it:
Open up android.jar and navigate to com.android. You will notice the package com.android.dx is omitted. Edit: You should be able to add dx.jar as a dependency. It should be located in...
I would look into storing the data into a SQLiteDatabase . SharedPreferences wasn't intended to save custom objects. If you really want to use SharedPreferences then Gson will be the best solution. API 11 added the...
This is always the best approach: You could also get the environmental variable which is on all Android devices like this:
I think the reason why new Test().new C().i works is because class Test is a top-level class and is treated as static . If you were to change your inner class C to be static then new C().i would work. However, you...