I’ve recently updated the android studio IDE to 0.8 to work with the new android L SDK. To start I imported a finished android project that receives no errors in the older version of android studio. In version 0.8 i lines such as import android.support.v4.app.Fragment; get: Support cannot be resolved causing the rest of the code to have errors. The
Tag: java
Using Java.io.Console.writer() Method in multiple threads
I am getting unexpected behavior when using console.writer() in multiple threads. In the below example, when program starts, I spawn a second thread, which is supposed to print to the console “Simulating Error.” every second. Then the main thread is supposed to print to the console when you type something like “get status 9999”: Instead what happens is after “Simulating
How to draw a SimpleWeightedGraph on a JPanel?
I have a SimpleWeightedGraph and I want to draw it on a JPanel in a JFrame. Unfortunately nothing is drawn. I read this article. They are using a ListenableDirectedGraph so I tried a ListenableUndirectedGraph with no success. Answer It looks that you’re leaving some important details out of your question, and without a Minimal, Complete, and Verifiable example it is
TimerTask class has to run only once in java
I have a class that runs for every 10 secs, but when I execute it more than once, multiple timers are started. If one timer is already running, I want the other timer calls to be ignored. I want only one timer to be running at a given point of time. Please help. My code: Answer I want the 1st
Regular expression – allow space and any number of digits
my valid string should be either “1234” or ” 1234″ allow one or zero space at the beginning then followed by any number of digits only so what should be the regular expression for this ? Answer You can use this: which is easier to read like this: See demo. To test if you have a match, you can do
With a DrawerLayout, how can I close the app on pressing Back no matter which screen is active?
I’m using a DrawerLayout for the navigation of my app: Taking this menu for the example: I’d like the Home button to launch the HomeActivity and so on. But clearing the activity stack, that is: If I press People, then Photos, then Locations and then the back button, the app should close. I’m trying intent flags when launching the activities
Fullscreen WebView when landscape?
I’m trying to build an app with a webview which should go fullscreen when the orientation changes to landscape. I did the way with layout-land and main.xml where I just gave the WebView fill_parent and it was over all the other views. The problem with that was, that the WebView was lagging. I hope there is another way to do
Custom Edge with jgrapht
I want to define a custom edge But when I try to use the super()is that possible? What should I use for EdgeFactory when creating a graph? Would this be sufficient? Or should I create a new class who extends EdgeFactory as well? Answer You do not require to subclass DefaultWeightedEdge to create your custom edge, the following works also.
Completely expand all node of a Jtree (including children)
I found some details on the internet for this problem but the solution does not seem to work. I want to be able to expand all the nodes ( including the leaf nodes ) of a JTree. This is the code I have …
Can a object be private and public?
Can a reference to an object be private in class while other object can have a public reference to the same class(post script: new to java+ a simple example please). I read somewhere that this prob is regarding aliasing? Sorry my title may not make sense! Answer Objects aren’t private or public. Fields can be private or public. Fields can