Java Javax: life cycle|states of thread in java with example|diagram|ppt|pdf

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States of Threads or Life Cycle of Threads:

Whenever we write a multi threading application there is a possibility of existing multiple threads. When the java program is under execution, all those threads will undergoes various stages. These stages are known as States of Thread.

States of thread are classified into five types. They are

1) New State.

2) Ready State.

3) Running State.

4) Waiting State.

5) Halted State.

1) New State:

A new state is one in which thread is created and it is about to enter into main memory

2) Ready State:

A Ready State is one in which thread is entered into main memory, memory space is created for the thread and first waiting for the C.P.U.

3) Running State:

A Running state is one in which the thread is under the control of C.P.U.

4) Waiting State:

A Thread is said to be in waiting state if and only if thread satisfies any of the following factors.

a) For the remaining C.P.U burst time: The amount of time required by the thread from the C.P.U for it’s complete execution is known as C.P.U burst time and it will be decided by O.S.

b) Suspending the currently executing thread.

c) Making the currently executing thread to sleep for a specified period of time in terms of milliseconds.

d) Making currently executing thread to wait for period of time.

e) Making the currently executing thread to wait without specifying any period of time.

5) Halted State:

A Thread is said to be in halted state the thread completed it’s execution.

Hence as long as the thread is in new and halted states, whose execution status is false, and these states are known as out memory states. Whereas as long as the threads are in ready, running and waiting states. Whose execution status is true and these states are known as in-memory states.

The Following Concepts Regarding Threads