What is the meaning of 'Synchronized'?

0 votes
Why and when to use Synchronized keyword?
Oct 17, 2018 in Java by Daisy
• 8,020 points
22 views

1 answer to this question.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
0 votes

The synchronized keyword is about different threads reading and writing to the same variables, objects and resources. 

synchronized methods enable a simple strategy for preventing thread interference and memory consistency errors: if an object is visible to more than one thread, all reads or writes to that object's variables are done through synchronized methods.

In a very, very small nutshell: When you have two threads that are reading and writing to the same 'resource', say a variable named foo, you need to ensure that these threads access the variable in an atomic way. Without the synchronized keyword, your thread 1 may not see the change thread 2 made to foo, or worse, it may only be half changed. This would not be what you logically expect.

answered Oct 17, 2018 by parth295
• 4,590 points

Related Questions In Java

+2 votes
1 answer

What is the meaning of "this" keyword in Java?

public class MyThisTest { private int ...READ MORE

answered Oct 10, 2018 in Java by Daisy
• 8,020 points
31 views
0 votes
2 answers

What is the meaning of purpose of this command: java -jar <some jar file>.jar ?

JAR (Java Archive) file is a package file ...READ MORE

answered Mar 21 in Java by Omkar
• 65,850 points
25 views
0 votes
2 answers

What is the use of toString method in Java and how can I use it ?

Whenever you require to explore the constructor ...READ MORE

answered Aug 23, 2018 in Java by Daisy
• 8,020 points
155 views
0 votes
1 answer

What is the use of @Override annotation in Java ? When do we use it ?

I think it is most useful as ...READ MORE

answered May 4, 2018 in Java by Akrati
• 3,150 points
44 views
0 votes
1 answer

What is the difference between Runnable and extends Thread

Runnable is the preferred way to create ...READ MORE

answered Apr 30, 2018 in Java by sharth
• 3,310 points
64 views
0 votes
1 answer

How to kill a thread in Java?

You can use a shared variable as ...READ MORE

answered Jun 6, 2018 in Java by Akrati
• 3,150 points
55 views
0 votes
1 answer

How to stop the Thread in Java?

Use a flag, which will indicate the ...READ MORE

answered Jun 11, 2018 in Java by parth295
• 4,590 points
47 views
+5 votes
3 answers

How to execute a python file with few arguments in java?

You can use Java Runtime.exec() to run python script, ...READ MORE

answered Mar 27, 2018 in Java by DragonLord999
• 8,360 points

edited Nov 6, 2018 by Omkar 4,594 views
0 votes
2 answers

What is the difference between = and equals()?

The equals() method compares the "value" inside String instances ...READ MORE

answered Aug 13, 2018 in Java by Daisy
• 8,020 points
25 views
0 votes
1 answer

What is the difference between package private, public, protected?

Modifier Class Package Subclass World Public Y Y Y Y Protected Y Y Y N No modifier Y Y N N private Y N N N   Public: Any package, any class accessibility is ...READ MORE

answered May 24, 2018 in Java by parth295
• 4,590 points
146 views

© 2018 Brain4ce Education Solutions Pvt. Ltd. All rights Reserved.
"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.