The join() method

The join() method waits for a thread to die. In other words, it causes the currently running threads to stop executing until the thread it joins with completes its task.

Syntax:

$\begin{lstlisting} public void join()throws InterruptedException public void join(long milliseconds)throws InterruptedException \end{lstlisting}$

Example

$\begin{lstlisting} class TestJoinMethod1 extends Thread{ public void run(){ ... ...System.out.println(e);} \par t2.start(); t3.start(); } } \end{lstlisting}$

Test it Now

$\begin{lstlisting} Output:1 2 3 4 5 1 1 2 2 3 3 4 4 5 5 \end{lstlisting}$

As you can see in the above example,when t1 completes its task then t2 and t3 starts executing. Following is the program that serves as an example of join(long miliseconds) method.

$\begin{lstlisting} lass TestJoinMethod2 extends Thread{ public void run(){ f... ...System.out.println(e);} \par t2.start(); t3.start(); } } \end{lstlisting}$

Test it Now

$\begin{lstlisting} Output:1 2 3 1 4 1 2 5 2 3 3 4 4 5 5 \end{lstlisting}$

In the above example,when t1 is completes its task for 1500 miliseconds(3 times) then t2 and t3 starts executing.