Multithreading in Java

Print Data Matrix in Java Multithreading

Multithreading
Data Matrix 2d Barcode Encoder In Java
Using Barcode encoder for Java Control to generate, create Data Matrix 2d barcode image in Java applications.
Recognizing Data Matrix ECC200 In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
// Begin execution of the thread public void run() { do { count++; if((count % 10000) == 0) { if(thrdgetPriority() > ThreadNORM_PRIORITY) // To see the effect of yield(), remove the comment // from the following line and comment-out the // "count = count" placeholder line Threadyield(); // yield to low-priority thread count = count; // do-nothing placeholder } } while(stop == false && count < 100000000); stop = true; } } class PriorityDemo { public static void main(String args[]) { PriThread mt2 = new PriThread("Low Priority", ThreadNORM_PRIORITY-1); PriThread mt1 = new PriThread("High Priority", ThreadNORM_PRIORITY+1); try { mt1thrdjoin(); mt2thrdjoin(); } catch(InterruptedException exc) { Systemoutprintln("Main thread interrupted"); } Systemoutprintln("\nHigh priority thread counted to " + mt1count); Systemoutprintln("Low priority thread counted to " + mt2count); } }
Making Barcode In Java
Using Barcode printer for Java Control to generate, create bar code image in Java applications.
Bar Code Decoder In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
Here is a sample run:
DataMatrix Creation In C#
Using Barcode printer for .NET Control to generate, create DataMatrix image in VS .NET applications.
Data Matrix Printer In Visual Studio .NET
Using Barcode printer for ASP.NET Control to generate, create DataMatrix image in ASP.NET applications.
High priority thread counted to 100000000 Low priority thread counted to 3464911
Data Matrix 2d Barcode Printer In VS .NET
Using Barcode printer for VS .NET Control to generate, create DataMatrix image in Visual Studio .NET applications.
DataMatrix Creation In Visual Basic .NET
Using Barcode printer for Visual Studio .NET Control to generate, create DataMatrix image in .NET applications.
As you can see, the high-priority thread received the vast majority of the CPU time Be aware that specific results will vary, depending on what version of the Java runtime system you are using, your operating system, processor speed, and task load
Barcode Maker In Java
Using Barcode drawer for Java Control to generate, create barcode image in Java applications.
UPC Code Creator In Java
Using Barcode encoder for Java Control to generate, create UPCA image in Java applications.
Herb Schildt s Java Prog ramming Cookbook
GS1 - 12 Maker In Java
Using Barcode maker for Java Control to generate, create GS1 - 12 image in Java applications.
GTIN - 128 Maker In Java
Using Barcode creator for Java Control to generate, create UCC-128 image in Java applications.
To see the effect of yield( ), remove the comments from the call to yield( ) in run( ) and comment out the statement count = count; (which is simply a placeholder) Thus, the nested if statements inside run( ) should look like this:
RM4SCC Maker In Java
Using Barcode creator for Java Control to generate, create RoyalMail4SCC image in Java applications.
ANSI/AIM Code 39 Reader In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
if((count % 10000) == 0) { if(thrdgetPriority() > ThreadNORM_PRIORITY) // To see the effect of yield(), remove the comment // from the following line and comment-out the // "count = count" placeholder line Threadyield(); // yield to low-priority thread // count = count; // do-nothing placeholder }
Making Bar Code In Objective-C
Using Barcode generation for iPad Control to generate, create barcode image in iPad applications.
Create Barcode In Java
Using Barcode encoder for Android Control to generate, create bar code image in Android applications.
Becaue the high-priority thread is occasionally yielding the CPU, the low-priority thread will gain more access to the CPU Although specific results will vary, here are the results of one sample run:
Data Matrix Creator In None
Using Barcode creator for Software Control to generate, create ECC200 image in Software applications.
Barcode Reader In C#
Using Barcode reader for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
High priority thread counted to 10850000 Low priority thread counted to 100000000
USS-128 Creator In None
Using Barcode maker for Online Control to generate, create EAN128 image in Online applications.
Recognizing UPC-A In Visual C#.NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
Notice that, because of the calls to yield( ), the low-priority thread actually finishes first! This graphically illustrates the fact that a thread s priority setting is only one of several factors that affect the amount of CPU access a thread receives
Options and Alternatives
Although yield( ) is a good way for a thread to yield the CPU, it is not the only way For example, sleep( ), wait( ), and join( ) all cause the invoking thread to suspend execution In general, suspending a thread implicitly yields the CPU Because of the many variations that can occur in the environments in which a Java program might execute, the specific behavior of a multithreaded program experienced in one environment cannot be generalized Therefore, when setting thread priorities, the execution characteristics of your program in one situation might not be the same in another You should not rely on thread priorities to achieve a desired flow of execution You should use interthread communication via wait( ) and notify( ), instead Remember: A thread s priority affects its potential access to the CPU but does not guarantee any sort of synchronization between threads
Monitor a Thread s State
Key Ingredients
Classes javalangThread Methods ThreadState getState( ) final boolean isAlive( )
7:
Multithreading
The Thread class supplies two methods that let you obtain information about the state of a thread: isAlive( ) and getState( ) As explained in Wait for a Thread to End, isAlive( ) returns true if the thread is active in the system and false if it has ended While isAlive( ) is useful, beginning with Java 5, you can obtain finely grained information about a thread s state, including whether it is runnable, waiting, or blocked, by using the getState( ) method Using both isAlive( ) and getState( ), it is possible to fully monitor the state of a thread This recipe demonstrates the process
Copyright © OnBarcode.com . All rights reserved.