What are the keywords related to threads in java

Java provides thread-related keywords, including: synchronized (protecting code blocks), volatile (ensuring variable visibility), wait() and notify() (thread communication), join() (waiting Thread completion), yield() (give up CPU time slice), ThreadLocal (thread local variables) and ReentrantLock (advanced lock mechanism). These keywords help create, manage, and synchronize threads, ensuring thread safety and efficient execution.

Thread-related keywords in Java

Java provides a variety of keywords to create, manage and Synchronize threads. These keywords help developers write multi-threaded applications while ensuring thread safety and efficient execution.

1. synchronized

• Purpose:Protect a certain code block or method to ensure that only one thread can execute it at the same time code.
• Usage: synchronized (lock) Modified code block, or synchronized modified method.

2. volatile

• Purpose: Ensures that the value of a variable is visible to all threads, even if they are Written by different threads.
• Usage: Add the volatile keyword before the variable declaration, for example: volatile int count;

3. wait() and notify()

• Purpose: Allow threads to wait for or wake up other threads when specific conditions are met .
• Usage: Use wait(), notify() and notifyAll( in a synchronized block ) method.

4. join()

• Purpose: Let the current thread wait for another thread to complete execution.
• Usage: Call the join() method on the Thread object.

5. yield()

• Purpose: Request the JVM to temporarily give up the CPU time slice of the current thread and allow other thread execution.
• Usage: Call the Thread.yield() method.

6. ThreadLocal

• Purpose: Maintain an independent copy of variables for each thread in a multi-threaded environment .
• Usage: Create a ThreadLocal object and set and get values ​​for it.

7. ReentrantLock

• Purpose: A higher-level synchronization mechanism that provides better performance than synchronized More fine-grained control.
• Usage: Use the ReentrantLock object to control access to shared resources.

These keywords are essential for writing efficient and thread-safe Java multi-threaded applications. Understanding and using them correctly can help developers avoid concurrency problems and ensure application reliability.

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