Will the Guru

Process vs Thread

• Memory Share
  • Process has independent memory space while threads share memory.
  • As threads share memory with each other, communication between them are easier and this results in importance of exclusive control.
• Context Switch
  • Normally, context switching is easier from threads than processes.

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Example

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Different ways of creating Threads

1. Using custom Thread class

2. Using anonymous class

3. Using Runnable

4. Using ThreadFactory

• Main class that uses Host class can control the detail of Thread creation

5. Using ThreadFactory of Executors

• Just need to update the ThreadFactory definition part from above case

6. Using Executor interface

• void execute(Runnable r);
  • Executor interface has this method which can abstract what to run inside

7. Using ExecutorService interface

• ExecutorService is a service which can repeatedly call execute
  • Unlike Executor which was generating new threads every time, ExecutorService can reuse the threads
• AS ExecutorService has threads in the background, it has shutdown() method which would terminate them