import java.util.concurrent.ArrayBlockingQueue; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit; public class UseExecutors { public static void main(String[] args) { ThreadPoolExecutor pool = new ThreadPoolExecutor( 1, // coresize 2, // maxsize 60, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(3) ,new MyRejected() ); MyTask mt1 = new MyTask(1, "任务1"); MyTask mt2 = new MyTask(2, "任务2"); MyTask mt3 = new MyTask(3, "任务3"); MyTask mt4 = new MyTask(4, "任务4"); MyTask mt5 = new MyTask(5, "任务5"); MyTask mt6 = new MyTask(6, "任务6"); MyTask mt7 = new MyTask(7, "任务7"); pool.execute(mt1); pool.execute(mt2); pool.execute(mt3); pool.execute(mt4); pool.execute(mt5); pool.execute(mt6); pool.execute(mt7); pool.shutdown(); } }public class MyTask implements Runnable{ private int taskId; private String taskName; public int getTaskId() { return taskId; } public void setTaskId(int taskId) { this.taskId = taskId; } public String getTaskName() { return taskName; } public void setTaskName(String taskName) { this.taskName = taskName; } public MyTask(int taskId, String taskName) { super(); this.taskId = taskId; this.taskName = taskName; } public String toString() { return Integer.toString(this.taskId); } @Override public void run() { try { System.out.println("run taskId = " + this.taskId); Thread.sleep(5*1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }import java.util.concurrent.RejectedExecutionHandler; import java.util.concurrent.ThreadPoolExecutor; public class MyRejected implements RejectedExecutionHandler { @Override public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) { // TODO Auto-generated method stub System.out.println("自定义处理..."); System.out.println("当前被拒绝任务为："+ r.toString()); } }运行结果如下： run taskId = 1 run taskId = 5 自定义处理... 当前被拒绝任务为：6 自定义处理... 当前被拒绝任务为：7 run taskId = 2 run taskId = 3 run taskId = 4
文章来源: 自定义线程池（固定长度队列）