notify

I know that similar questions have been discussed in this site, but I have not still got further by their aid considering a specific example. I can grasp the difference of notify() and notifyAll() regarding Thread "awakeining" in theory but I cannot perceive how they influence the functionality of program when either of them is used instead of the other. Therefore I set the following code and I would like to know what is the impact of using each one of them. I can say from the start that they give the same output (Sum is printed 3 times). How do they differ virtually? How could someone modify

Specifically, can somebody tell me what is wrong with this piece of code. It should start the threads, so should print "Entering thread.." 5 times and then wait until notifyAll() is called. But, it randomly prints "Entering.." and "Done.." and still keeps waiting on others. public class ThreadTest implements Runnable { private int num; private static Object obj = new Object(); ThreadTest(int n) { num=n; } @Override public void run() { synchronized (obj) { try { System.out.println("Entering thread "+num); obj.wait(); System.out.println("Done Thread "+num); } catch (InterruptedException e) { e

I've got a python program which runs via crontab and that works perfectly. However, I decided to add the ability to notify me of what it's doing, and suddenly it's failing. It runs from the command line, however, running it as a crontab program causes it to fail libnotify-Message: Unable to get session bus: /bin/dbus-launch terminated abnormally with the following error: Autolaunch error: X11 initialization failed. What am I doing wrong? Edit I would like this program to still run from cron and be able to take advantage of notifying the user of it's work. Is there any way to do this? Edit 2 I

I have an app that needs to wait for some unknown amount of time. It must wait until several data fields are finished being populated by a server. The server's API provides me a way to request data, easy enough... The server's API also provides a way to receive my data back, one field at a time. It does not tell me when all of the fields are finished being populated. What is the most efficient way to wait until my request is finished being processed by the server? Here's some pseudocode: public class ServerRequestMethods { public void requestData(); } public interface ServerDeliveryMethods {

Object类位于java.lang包中，java.lang包包含着Java最基础和核心的类，在编译时会自动导入。Object类没有定义属性，一共有13个方法，具体的类定义结构如下图： 1.类构造器public Object(); 大部分情况下 ，Java中通过形如 new A(args..)形式创建一个属于该类型的对象。其中A即是类名，A(args..)即此类定义中相对应的构造函数。通过此种形式创建的对象都是通过类中的构造函数完成。为体现此特性，Java中规定：在类定义过程中，对于未定义构造函数的类，默认会有一个无参数的构造函数，作为所有类的基类，Object类自然要反映出此特性，在源码中，未给出Object类构造函数定义，但实际上，此构造函数是存在的。 当然，并不是所有的类都是通过此种方式去构建，也自然的， 并不是所有的类构造函数都是public。 2.private static native void registerNatives(); registerNatives函数前面有native关键字修饰，Java中，用native关键字修饰的函数表明该方法的实现并不是在Java中去完成，而是由C/C++去完成，并被编译成了.dll，由Java去调用。方法的具体实现体在dll文件中，对于不同平台，其具体实现应该有所不同。用native修饰，即表示操作系统，需要提供此方法

I wondered if there is a way to have notify display a message on gulp-sass error. preferably the actual message that is displayed in the console. my gulp task looks like this: gulp.task('styles', function() { return gulp.src('src/scss/style.scss') .pipe(sass({ style: 'compressed', errLogToConsole: true })) .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4')) .pipe(gulp.dest('')) .pipe(livereload(server)) .pipe(notify({ message: 'Styles task complete' })); }); I'd like to pipe the notify to some kind of error callback. Any help appreciated. After

I've being trying to solve this problem but I couldn't figure it out yet. In my layout have a listview with its custom adapter. Inside each view I have many objects stored in a static class called ViewHolder. One is a gallery with another custom adapter. My problem is that after I get an onActivityResult on my Activity. I need to send a notifyDataSetChanged() to my gallery adapter. If I do: ((BaseAdapter)list.getAdapter()).notifyDataSetChanged(); All the items inside the adapter are refreshed except the ones that have their own custom adapter. Now I thought maybe I thought maybe there is a way

Java SE7 API - Thread: http://docs.oracle.com/javase/7/docs/api/java/lang/Thread.html#yield%28%29 参考资料： http://blog.csdn.net/lqqmisslll/article/details/54208491 一、线程的简介 当JVM启动的时候， 通常会有一个独立的非守护线程（也就是类中的main方法所在的线程）.JVM会继续运行，除非发生以下情况： Runtime类的exit()方法被调用，并且安全管理者允许退出发生。 所有非守护线程都已经死了，不管是从run方法中返回的还是因为run方法中抛出了异常。 注意：当所有非守护线程都执行结束（包括主线程），那么守护线程也会退出。因为守护线程是无法脱离非守护线程而独自存在的。 二、创建线程有两种方式： 方法1：声明一个类作为Thread的子类（extends Thread），子类重写（override）Thread类的run()方法。子类的实例可以被分配和start。 //比如：该线程用来计算比指定起始值大的素数。 class PrimeThread extends Thread { long minPrime; PrimeThread(long minPrime) { this.minPrime = minPrime; }