basicthread.html
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<TITLE>Creating a Thread
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<h3>
e92.
Creating a Thread</h3>
When a thread is created, it must be permanently bound to an object
with a <code>run()</code> method. When the thread is started, it will invoke the
object's <code>run()</code> method. More specifically, the object must implement
the <code>Runnable</code> interface.
<P> There are two ways to create a thread. The first is to declare
a class that extends <code>Thread</code>. When the class is instantiated, the
thread and object are created together and the object is automatically
bound to the thread. By calling the object's <code>start()</code> method,
the thread is started and immediately calls the object's <code>run()</code> method.
Here is some code to demonstrate this method.
<pre>
// This class extends Thread
class <font color="#0066ff"><i>BasicThread1</i></font> extends Thread {
// This method is called when the thread runs
public void run() {
}
}
</pre>
<pre>
// Create and start the thread
Thread thread = new <font color="#0066ff"><i>BasicThread1</i></font>();
thread.start();
</pre>
The second way is to create the thread and supply it an object with a
<code>run()</code> method. This object will be permanently associated with the
thread. The object's <code>run()</code> method will be invoked when the thread
is started. This method of thread creation is useful if you want many
threads sharing an object. Here is an example that creates a
<code>Runnable</code> object and then creates a thread with the object.
<pre>
class <font color="#0066ff"><i>BasicThread2</i></font> implements Runnable {
// This method is called when the thread runs
public void run() {
}
}
</pre>
<pre>
// Create the object with the run() method
Runnable runnable = new <font color="#0066ff"><i>BasicThread2()</i></font>;
// Create the thread supplying it with the runnable object
Thread thread = new Thread(runnable);
// Start the thread
thread.start();
</pre>
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Related Examples
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e93. <a class="eglink" href="StopThread.html?l=rel">
Stopping a Thread
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e94. <a class="eglink" href="IfStopped.html?l=rel">
Determining When a Thread Has Finished
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e95. <a class="eglink" href="Sleep.html?l=rel">
Pausing the Current Thread
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e96. <a class="eglink" href="PauseThread.html?l=rel">
Pausing a Thread
</a>
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e97. <a class="eglink" href="IfLocked.html?l=rel">
Determining If the Current Thread Is Holding a Synchronized Lock
</a>
<br>
e98. <a class="eglink" href="DaemonThread.html?l=rel">
Allowing an Application with Live Threads to Exit
</a>
<br>
e99. <a class="eglink" href="ListThreads.html?l=rel">
Listing All Running Threads
</a>
<br>
e100. <a class="eglink" href="TLocal.html?l=rel">
Using a Thread-local Variable
</a>
<br>
e101. <a class="eglink" href="GetStack.html?l=rel">
Getting the Stack Trace of an Exception
</a>
<br>
e102. <a class="eglink" href="WorkQueue.html?l=rel">
Implementing a Work Queue
</a>
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See also:
<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Arrays">
Arrays
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<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Assertions">
Assertions
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<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Classes">
Classes
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<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Commands">
Commands
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<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Numbers">
Numbers
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<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Objects">
Objects
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<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Strings">
Strings
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<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#System%20Properties">
System Properties
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