In Java concurrent programming, thread safety is an important concept. When multiple threads access shared resources at the same time, if thread synchronization and race conditions are not handled correctly, data inconsistency or unexpected program errors may occur. Therefore, understanding the basics of thread safety is key to writing efficient and reliable concurrent programs.
The concept of thread safety means that no problems will occur when multiple threads access a shared resource at the same time. In Java, we can use various mechanisms to achieve thread safety, including using the synchronization keyword, using locks, using atomic classes, etc. Several common thread safety basics will be introduced below.
- sync method
In Java, you can use keywords synchronizedto modify methods to make them synchronized. The synchronized method locks the entire method to ensure that only one thread can execute the method at the same time. Here is an example of thread safety using synchronized methods:
public class Counter {
private int count;
public synchronized void increment