logo
down
shadow

Why are wait, notify and notifyAll methods of the class Object?


Why are wait, notify and notifyAll methods of the class Object?

By : user2953679
Date : November 21 2020, 01:01 AM
wish helps you The fact that methods are inherited does not violate the Single Responsibility Principle. It could potentially violate the SRP if those methods could be overridden. But they cannot, they are declared final.
The SRP defines reponsibility
code :


Share : facebook icon twitter icon
Java notify(), notifyAll() and wait() methods

Java notify(), notifyAll() and wait() methods


By : ajeshh
Date : March 29 2020, 07:55 AM
I wish this help you
Threads can use Objects to transmit messages from one thread to another, and these methods allow that to happen. A Thread calls wait() to say "I am waiting for a message to be sent to this object." Another thread can call notify() to say "I am sending a message to that object." The Object is therefore a conduit through which threads communicate without explicitly referencing each other. If the methods were in the Thread class, then two threads would need to have references to one another to communicate. Instead, all communicating threads just need to agree to use some specific shared resource.
synchronized block/method without wait() and notify() notifyAll() methods

synchronized block/method without wait() and notify() notifyAll() methods


By : Yurgen
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , It is mandatory that wait(), notify() and notifyAll() should always be called from within a synchronized block. But it does not mean that synchronized blocks should always have one of these methods.
why wait/notify/notifyAll methods are not synchronized in java ?

why wait/notify/notifyAll methods are not synchronized in java ?


By : zbgn
Date : March 29 2020, 07:55 AM
Hope this helps For notify and notifyAll, the problem with your idea is that when you notify you also have other stuff you're typically doing in the same synchronized block. So making the notify method synchronized wouldn't buy you anything, you'd still need the block. Likewise wait has to be in a synchronized block or method in order to be useful, such as being inside a spinlock where the test has to be synchronized anyway. So the granularity of locking is all wrong for what you suggest.
Here's an example, this is about the simplest queue implementation you can have in Java:
Why wait ,notify and notifyAll Methods are in Object Class?

Why wait ,notify and notifyAll Methods are in Object Class?


By : Harmen Kraaijeveld
Date : March 29 2020, 07:55 AM
hop of those help? They are also in the Thread class. But a thread instance here is equally well suited as a synchronization object as any other object.
In addition, there have already been voices that question this decision of sun, since now every object carries the burden to be able to be synchronized on, and IMHO they should have refactored this out to separate objects long ago.
Why wait, notify and notifyAll are methods in Object class not like Cloneable

Why wait, notify and notifyAll are methods in Object class not like Cloneable


By : Scoot
Date : March 29 2020, 07:55 AM
To fix the issue you can do JVM uses OS-level threads. That means that each concrete JVM for each concrete OS handles threads differently. And these methods are not only implemented in Object class, they are marked as native, which kind of means that the are implemented in system layer of JVM.
And if those methods were in some interface, that would mean that anybody can redefine them.
Related Posts Related Posts :
  • Stream corrupted exception - invalid code type AC [java]
  • Routing Sysout values to JTextArea
  • GWT RPC serialization for Dynamic Host Page
  • Best Approch of Returning Value from 'getter' Method
  • Understanding xml schemalocation
  • Checking if a PDF is PDF/A 1-a format or not using PDFBOX in java
  • Difference Between Variable and Identifier
  • How to compute two aggregate functions with Java streams?
  • Parse the value of the json to baseadapter in android?
  • JavaFX animation on raspberry pi
  • Solve "unchecked warning" in Java avoiding @suppressWarnings
  • How to specify a new name for a file while moving it to another directory in Java?
  • Popup window not showing up with spinner item selection?
  • how to iterate through json objects in java
  • Caused by: java.lang.NoClassDefFoundError: org/springframework/aop/framework/AbstractAdvisingBeanPostProcessor
  • Getting NoClassDefFoundError while running PMD task from Gradle
  • Matlab drag and drop file from windows explorer to figure (gui)
  • How does scala's actor model make use of C threads and native system threads?
  • Store java.util.Date as key in a Map based on reference equality instead of "value" equality
  • Error when logging into FTP from AsyncTask class using org.apache.commons.net.ftp.FTPClient
  • creating unique index in mongoDB
  • hibernate Query to find record based on substring
  • How many strings are in jvm string pool intern
  • Unable to initialize native-platform. on Jenkins
  • How to create a list of dummy files in Java?
  • Docker: Which approach is better? WAR embedded in image or base image + war?
  • java.lang.InternalError: CallerSensitive annotation expected at frame 1
  • How to write a method to read JSON files of different structures and return different POJO objects in Java?
  • Reference to Classes in Java
  • Unable to call function via companion object
  • REST: convert XML content passed with POST to a java object, attribute inside the element
  • Device not receive message from GCM
  • How to increase Openfire concurrent connection limit?
  • Android send custom parameter on AsyncTask
  • GWT - Get dom element's value from another page
  • How can i initialize an array in Java?
  • Is it possible to increase a java process's(when is running) size?
  • Getting Node Address instead of Value in Binary Search Tree
  • PdfByteContent not adding in iText pdf
  • Spring JpaRepository: delete() with subsequent save() in the same transaction
  • producer-consumer using arraydeque working only in breakpoint
  • Adding a JPanel to another JPanel
  • Comparison with operator ==, how does it work?
  • Error buildling with maven for openshift
  • What is the java equivilant to MySQL's smallint
  • proxy trouble on eclipse with https
  • Spring-Jdbc Template and Prepared statement
  • Mule - exception in Outbound endpoint Message payload is of type: byte[]
  • Modify package names for java classes generated from wsdl
  • How to download multiple images and have one progressBar using AsynTask (Android)
  • Implementing Service Provider, IdP and user in java with SAML (POC)
  • Why does my scanner repeat?
  • Can I forget ResultSetFuture in Cassandra java driver without facing memory leak?
  • XML to JAXB binding having nested elements?
  • Java: ToString() prints the same hashcode each time
  • Why am I getting a thread exception in my graphics program?
  • Can we read 4th byte from hexadecimal value?
  • How to create watermark in image just like Google maps watermarks
  • how come Thread class called inside another class?
  • AssertionError: Unexpected schema version 0: Unexpected schema version 0
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org