Java 中的 BlockingDeque size()方法，带示例
原文:https://www . geeksforgeeks . org/blocking eque-size-method-in-Java-with-examples/
阻塞请求的大小()方法返回德格容器的当前大小。在调用该函数时，将返回 Deque 容器中的元素数量。如果容器是容量受限的，那么它还返回在函数调用时容器中存在的元素的数量。
语法:
public int size()
返回:该方法返回一个整数值，表示容器中的元素数量。
注:blocking request的 size() 方法继承自 Java 中的 LinkedBlockingDeque 类。
下面的程序举例说明了大小()方法的阻塞请求:
程序 1:
// Java Program to demonstrate public int size()
// 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>();
// Add numbers to end of BlockingDeque
BD.add(15);
BD.add(20);
BD.add(20);
BD.add(15);
BD.add(15);
BD.add(20);
BD.add(20);
BD.add(15);
// print Deque
System.out.println("Blocking Deque: " + BD);
// prints the Deque after removal
System.out.println("Size of Blocking Deque: "
+ BD.size());
}
}
输出:
Blocking Deque: [15, 20, 20, 15, 15, 20, 20, 15]
Size of Blocking Deque: 8
程序二:
// Java Program to demonstrate public int size()
// 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<String> BD
= new LinkedBlockingDeque<String>();
// Add numbers to end of BlockingDeque
BD.add("geeks");
BD.add("forGeeks");
BD.add("A Computer");
BD.add("Portal");
// print Dequeue
System.out.println("Blocking Deque: " + BD);
// prints the Deque after removal
System.out.println("Size of Blocking Deque: "
+ BD.size());
}
}
输出:
Blocking Deque: [geeks, forGeeks, A Computer, Portal]
Size of Blocking Deque: 4
参考:https://docs . Oracle . com/javase/7/docs/API/Java/util/concurrent/blockingdequee . html # size()
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