contains()
的ArrayBlockingQueue类的方法被用于搜索队列中的元素。如果元素存在于队列中,则返回TRUE。
语法如下-
boolean contains(Object ob)
在这里,ob是要搜索的元素。
要使用ArrayBlockingQueue类,您需要导入以下包-
import java.util.concurrent.ArrayBlockingQueue;
以下是实现contains()
Java ArrayBlockingQueue类的方法的示例-
import java.util.concurrent.ArrayBlockingQueue; public class Demo { public static void main(String[] args) throws InterruptedException { ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<Integer>(10); q.add(200); q.add(310); q.add(400); q.add(450); q.add(500); q.add(550); q.add(700); System.out.println("ArrayBlockingQueue = " + q); System.out.println("The head of the queue = "+q.take()); System.out.println("Does the element 400 exist in the queue? = "+q.contains(400)); //添加更多元素 q.add(50); q.add(70); q.add(90); System.out.println("ArrayBlockingQueue = " + q); System.out.println("The head of the queue = "+q.take()); System.out.println("Does the element 10 exist in the queue? = "+q.contains(10)); } }
输出结果
ArrayBlockingQueue = [200, 310, 400, 450, 500, 550, 700] The head of the queue = 200 Does the element 400 exist in the queue? = true ArrayBlockingQueue = [310, 400, 450, 500, 550, 700, 50, 70, 90] The head of the queue = 310 Does the element 10 exist in the queue? = false