What is the concept of deadlock in java

Explanation

1. Deadlock often manifests as program pauses or no longer responding to user requests. From the perspective of the operating system, the CPU occupancy rate of the corresponding process is zero and will soon disappear from the output of top or prstat.

2. The detection of deadlock has been strengthened in java5. Java-level deadlocks can be reported directly in thread dumps.

2. Example

Found one Java-level deadlock:
=============================
"Thread-1":
waiting to lock monitor 0x0003f334 (object 0x22c19f18, a java.lang.Object),
which is held by "Thread-0"
 
"Thread-0":
waiting to lock monitor 0x0003f314 (object 0x22c19f20, a java.lang.Object),
which is held by "Thread-1"

What are the advantages of Java

1. Simple. Just understand the basic concepts and you can write programs suitable for various applications. Applications in this situation;

2. Object-oriented;

3. Distribution, Java is a network-oriented language;

4. Robustness, java provides automatic Garbage collection is used for memory management to prevent programmers from making mistakes when managing memory;

5. Security, Java used in network and distributed environments must prevent virus intrusion.

6. Architecture neutral, as long as the Java runtime system is installed, it can run on any processor.

7. Portability, Java can be easily transplanted to different machines on the network.

8. Interpretation and execution, the Java interpreter directly interprets and executes the Java bytecode.

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