Threads Section Index | Page 2

The setDefaultUncaughtExceptionHandler() method of Thread, introduced in JDK 5.0, allows you to configure this behavior by letting you attach an implementation of Thread.UncaughtExceptionHandler. more

ThreadGroups activeGroupCount() returns the number of active groups within the ThreadGroup instance it was called upon. Once the number of active groups is obtained ThreadGroups enumerate(ThreadG...more

A ThreadGroup is used to represent a group of Threads. A tree structure can be formed from ThreadsGroups containing other ThreadGroups. Threads can only access the ThreadGroup to which they belon...more

A ThreadGroup is used to represent a group of Threads. A tree structure can be formed from ThreadsGroups containing other ThreadGroups. Threads can only access the ThreadGroup to which they belon...more

Any Threads running within the JVM can be preempted by creating and starting a Thread which is of a higher priority. A Threads priority can be set using the following method. public void setPr...more

A Threads identifer is a positive unique long value which is generated when a Thread is created. Using the following method a Threads identifer can be obtained. public long getId() Here is a ...more

Is there a way that I can get the number of threads currently executing within the JVM?

You can't directly by using wait and notify, but the can use a similar construct with the Lock interface of the java.util.concurrent.locks package, with its boolean tryLock(long time, TimeUnit uni...more

The Executors class of the java.util.concurrent class offers newCachedThreadPool(), newCachedThreadPool(ThreadFactory threadFactory), newFixedThreadPool(int nThreads), newFixedThreadPool(int nThre...more

The TimeUnit class allows you to work with time quanities as both an amount and a unit of measurement. For instance, instead of always working with milliseconds when you want to put a thread to sl...more

Prior to Java 5, isAlive() was commonly used to test a threads state. If isAlive() returned false the thread was either new or terminated but there was simply no way to differentiate between the...more

The Thread API allows Threads to be created which are at the mercy of their user threads. This is accomplished simply by passing true to the setDaemon() method and invoking the method off an insta...more

The setUncaughtExceptionHandler() method of Thread, introduced in JDK 5.0, allows you to configure this behavior by letting you attach an implementation of Thread.UncaughtExceptionHandler. The int...more

[I know a HashMap object is not synchronized if not done explicitly, so in a case where you have to write and read data in a hashmap from different threads you need to synchronize it (or use anoth...more

[I have a thread which is sleeping for a long period of time.Another object has the object of this sleeping thread. In some event , the second object wants to wake up the sleeping thread before i...more