runnable

问题 public class HelloRunnable implements Runnable { public void run() { System.out.println("Hello from a thread!"); } public static void main(String args[]) { (new Thread(new HelloRunnable())).start(); } } According to Java Doc The Runnable interface defines a single method, run , meant to contain the code executed in the thread. The Runnable object is passed to the Thread constructor. So, When we execute HelloRunnable, who calls the inside run method? In the Thread class, the start method looks

问题 It works fine when compiling project, but after exporting it to a runnable jar and launching, it can't find external files and throws an error. What should I do? 回答1: You could attempt building a fat jar that includes all the jars. It contains a custom class loader to load the jars referenced externally by your project. Try using http://fjep.sourceforge.net/ plugin to build a fat jar. You can export a java project containing jars using the File -> Export -> Other -> One Jar Exporter . The jar

问题 I have a service which contains a Timer and TimerTask for receiving data from Webservice in periods of time. everything works fine except Toast. I want to show a Toast to user in procSendMapMovements but i get exception. How can I use Toast in it? class taskSendMapMovements extends TimerTask { @Override public void run() { hhSendMapMovements.sendEmptyMessage(0); } }; // ///////////////////// final Runnable rSendMapMovements = new Runnable() { public void run() { procSendMapMovements(); } };

问题 I am trying to understand how UI thread's event queue works. I'm trying to run a code that can be broken into many parts but unfortunately it must run on the UI thread. So, in order to not block the UI thread and receive a ANR I was wondering if I can break that code in many Runnable objects and run them using runOnUiThread from another thread. My question is, will this block the UI thread? If, for example, I have a piece of code that definitely runs in over 5 seconds and I break this code

问题 I am doing sht like: executor.execute((Runnable & Serializable)func); Where func is an anonymous function, I have to heavily use this in the project otherwise I would have to create a class for every different function I want to call and implement Runnable and Serializable in each of those class, the advantage would be that I would have the type at compile time rather than casting it at run time, I would like to know if doing this cast is too costly or is trivial and does not represent a big

问题 I want the objects of this class: public class Chromosome implements Runnable, Comparable<Chromosome> { private String[] chromosome; public double fitness; private Random chromoGen; public Chromosome(double[] candidate) { super(); //encode candidate PER parameter; using Matrix as storage chromosome = encode(candidate); chromoGen = new Random(); } //De-fault public Chromosome() { super(); chromoGen = new Random(); //de-fault genotype chromosome = new String[6]; } /** * IMPLEMENTED */ public

问题 since several days, I tried to figure out what exactly happens if I execute code in void function(){ //somePreExecutionCode new Handler().post(new Runnable(){ @Override public void run(){ //someCode } }); } It seems like it isn't blocking the UI, so buttons, which calls function() doesn't stuck in the clicked position until someCode has finished. But if somePreExecutionCode starts a progressBar, the progressBar is shown at exactly the same moment, when someCode has finished. I know, there are

问题 I've seen a few questions on here asking similar questions, but I've not yet seen a suitable answer. Many people have asked how to update the UI from a thread, but they're almost always in the same class as the UI. What I'm trying to do is update the UI from a thread which has been created in another class. I've seen all of the suggestions, such as async, handlers, runnable, etc... but I've having real trouble implementing them in separate classes. I'm trying to keep my UI class minimal and

问题 I have recently developed a game in Slick2D, i have accessed all my images directly e.g Image i = new Image("address.png"); as opposed to using a class that will load resources or using an input stream. I wondered if it would still be possible to load all the resources into a jar, i added the /res folder to my buildpath and used jarsplice to add my libraries and natives however the jar will not run because it cannot find the images. 回答1: Image i = new Image("address.png"); Is looking into the

问题 I have recently developed a game in Slick2D, i have accessed all my images directly e.g Image i = new Image("address.png"); as opposed to using a class that will load resources or using an input stream. I wondered if it would still be possible to load all the resources into a jar, i added the /res folder to my buildpath and used jarsplice to add my libraries and natives however the jar will not run because it cannot find the images. 回答1: Image i = new Image("address.png"); Is looking into the