Java 中 BlockingDeque offerLast()方法，带示例
原文:https://www . geeksforgeeks . org/blocking eque-offer last-method-in-Java-with-examples/
提供最后一个(E e) 方法阻塞请求将参数中传递的元素插入到 Deque 容器的末尾。如果容器的容量已经超出，那么它不会像 add()和 addLast()函数那样返回异常。
语法:
public boolean offerLast(E e)
参数:该方法接受一个强制参数 e ，它是要插入到阻塞请求末尾的元素。
返回:这个方法返回真如果元素已经插入，否则返回假。
注:blocking eque的 offerLast()方法继承自 Java 中的link edblocking eque类。
下面的程序说明了阻塞请求的 offerLast()方法:
程序 1:
// Java Program Demonstrate offerLast()
// 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 IllegalStateException
{
// create object of BlockingDeque
BlockingDeque<Integer> BD
= new LinkedBlockingDeque<Integer>(4);
// Add numbers to end of BlockingDeque
BD.offerLast(7855642);
BD.offerLast(35658786);
BD.offerLast(5278367);
BD.offerLast(74381793);
// Cannot be inserted
BD.offerLast(10);
// cannot be inserted hence returns false
if (!BD.offerLast(10))
System.out.println("The element 10 cannot be inserted"
+ " as capacity is full");
// before removing print queue
System.out.println("Blocking Deque: " + BD);
}
}
输出:
The element 10 cannot be inserted as capacity is full
Blocking Deque: [7855642, 35658786, 5278367, 74381793]
程序二:
// Java Program Demonstrate offerLast()
// 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 IllegalStateException
{
// create object of BlockingDeque
BlockingDeque<String> BD
= new LinkedBlockingDeque<String>(4);
// Add numbers to end of BlockingDeque
BD.offerLast("abc");
BD.offerLast("gopu");
BD.offerLast("geeks");
BD.offerLast("richik");
// Cannot be inserted
BD.offerLast("hii");
// cannot be inserted hence returns false
if (!BD.offerLast("hii"))
System.out.println("The element 'hii' cannot be"
+ " inserted as capacity is full");
// before removing print queue
System.out.println("Blocking Deque: " + BD);
}
}
输出:
The element 'hii' cannot be inserted as capacity is full
Blocking Deque: [abc, gopu, geeks, richik]
版权属于：月萌API www.moonapi.com，转载请注明出处
