Threads Section Index | Page 6

Multitasking is running multiple "heavyweight" processes (tasks) by a single OS. Multithreading is running multiple "lightweight" processes (threads of execution) in a single ...more

Anytime the java.awt.Toolkit instance is (directly or indirectly) created. The direct way to create it is by calling- Toolkit.getDefaultToolkit(); Indrect way is by creating any AWT object. Her...more

Yes. You can determine this by running the following program and doing a thread dump: public class mainthread extends Thread { public static void main(String[] args) { mainthread ...more

InterruptedException is thrown if another thread calls interrupt() on the sleeping thread while it is asleep. If sleep() is setting an alarm clock before bed, interrupt() is a midnight phone call...more

Mapping of Java's 10 thread priorities to the underlying OS is platform dependent. For example, NT has 7 priorities which needs to get mapped to Java's 10 -- and you don't really know what Java p...more

Theres an easy way to list the threads running in a JVM, just write the following class, compile and run from the command line.... public class ThreadDisplayer { public static void main( Stri...more

There is no technical limit. There are theoretical limits that a platform can support. If you look at the Volano report, you'll see some limitations that they ran across.more

A simple deadlock situation is one in which a two threads are waiting. Each thread waiting for a resource which is held by the other waiting thread. [In Java, this resource is usually the object ...more

Is there a way in Java to check whether an object is locked (i.e. some thread has it) in a non-blocking fashion? Is there an atomic operation that would get the lock if it's available and bail imme...more

According to the JavaDoc, IllegalMonitorStateException is thrown "to indicate that a thread has attempted to wait on an object's monitor or to notify other threads waiting on an object's moni...more

A thread is a CPU's state of execution as it processes a set of instructions (also referred to as a task). An interrupt is a condition that causes the CPU to store the state of its current thread...more

I have written plenty of non-thread-safe Singletons but it wasn't until recently when I tracked it down that I realized that thread-safety could be a big problem. The problem is that in the typic...more

A process is an OS-level task or service. A thread runs "inside" a process and may be virtual or simulated. Generally speaking, threads share resources like memory, where processes each ...more

This article has the answers to all of your questions. http://developer.java.sun.com/developer/technicalArticles/Programming/Stacktrace/index.html -Joel more

Java programmers sometimes hear that Java's mutual exclusion mechanism is based upon monitors. Here, I give the historical context for Java's thread model and define monitor. In the mid-1960's...more