Multi-threaded programming is a common task in Java and it can help improve the performance and concurrency of your program. However, due to the complexity of multi-threading, it is also easy to cause some common problems. In this article, we will discuss several common Java multi-threading problems and provide corresponding solutions.
Problem 1: Race Condition (Race Condition)
Race condition refers to the uncertainty in the order in which multiple threads access shared resources, causing the program results to not meet expectations. This problem usually occurs when multiple threads read and write shared data at the same time.
Solution: Use synchronization mechanisms, such as the synchronized keyword or Lock object, to ensure that access to shared resources is mutually exclusive. By synchronizing a critical block of code, you can ensure that only one thread can execute the block of code at a time, thus avoiding race conditions.
Sample code:
public class Counter {
private int count;
public synchronized void increment