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 * This code is distributed in the hope that it will be useful, but WITHOUT
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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

package java.util.concurrent;


An object that creates new threads on demand. Using thread factories removes hardwiring of calls to new Thread, enabling applications to use special thread subclasses, priorities, etc. 

The simplest implementation of this interface is just:

 
class SimpleThreadFactory implements ThreadFactory {
  public Thread newThread(Runnable r) {
    return new Thread(r);
  }
 }
 The Executors.defaultThreadFactory method provides a more useful simple implementation, that sets the created thread context to known values before returning it. 
Author:Doug Lea
Since:1.5
/**
 * An object that creates new threads on demand.  Using thread factories
 * removes hardwiring of calls to {@link Thread#Thread(Runnable) new Thread},
 * enabling applications to use special thread subclasses, priorities, etc.
 *
 * <p>
 * The simplest implementation of this interface is just:
 * <pre> {@code
 * class SimpleThreadFactory implements ThreadFactory {
 *   public Thread newThread(Runnable r) {
 *     return new Thread(r);
 *   }
 * }}</pre>
 *
 * The {@link Executors#defaultThreadFactory} method provides a more
 * useful simple implementation, that sets the created thread context
 * to known values before returning it.
 * @since 1.5
 * @author Doug Lea
 */
public interface ThreadFactory {

    
Constructs a new Thread. Implementations may also initialize priority, name, daemon status, ThreadGroup, etc. 
Params:
  • r – a runnable to be executed by new thread instance
Returns:constructed thread, or null if the request to create a thread is rejected
/**
     * Constructs a new {@code Thread}.  Implementations may also initialize
     * priority, name, daemon status, {@code ThreadGroup}, etc.
     *
     * @param r a runnable to be executed by new thread instance
     * @return constructed thread, or {@code null} if the request to
     *         create a thread is rejected
     */
    Thread newThread(Runnable r);
}