Java 中 BlockingDeque take()方法示例
原文:https://www . geeksforgeeks . org/blocking request-take-method-in-Java-with-examples/
封锁请求的 take() 方法返回并移除德格集装箱的头部。如果在等待时被中断，该方法将抛出中断异常。
语法:
public E take()
返回:该方法返回德格容器的头部。
异常:如果在等待时被中断，该功能会抛出中断异常。
注:blocking request的 take() 方法继承自 Java 中的 LinkedBlockingDeque 类。
下面程序举例说明采取()方法的阻塞请求:
节目 1:
// Java Program to demonstrate take()
// method of LinkedBlockingDeque
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.BlockingDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws InterruptedException
{
// create object of BlockingDeque
BlockingDeque<Integer> BD
= new LinkedBlockingDeque<Integer>();
// Add numbers to end of BlockingDeque
BD.add(7855642);
BD.add(35658786);
BD.add(5278367);
BD.add(74381793);
// print Deque
System.out.println("Blocking Deque: " + BD);
// removes the front element and prints it
System.out.println("Head of Blocking Deque: "
+ BD.take());
// prints the Deque
System.out.println("Blocking Deque: " + BD);
}
}
输出:
Blocking Deque: [7855642, 35658786, 5278367, 74381793]
Head of Blocking Deque: 7855642
Blocking Deque: [35658786, 5278367, 74381793]
程序 2: 演示中断异常
// Java Program to demonstrate take()
// method of BlockingDeque
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.BlockingDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws InterruptedException
{
// create object of BlockingDeque
BlockingDeque<Integer> BD
= new LinkedBlockingDeque<Integer>();
// print Dequeue
// the Deque is empty
System.out.println("Blocking Deque: " + BD);
try {
// throws error as the list is empty
// and it is interrupted while waiting
System.out.println("Head of Blocking Deque: "
+ BD.take());
}
catch (Exception e) {
System.out.println("Exception: " + e);
}
}
}
运行时错误:
Max real time limit exceeded due to either by heavy load on server or by using sleep function.
参考:https://docs . Oracle . com/javase/7/docs/API/Java/util/concurrent/blockingdequee . html # take()
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