Java 中的 ArrayBlockingQueue contains() 方法
java 8object oriented programmingprogramming
ArrayBlockingQueue 类的 contains() 方法用于在队列中搜索元素。如果元素存在于队列中，则返回 TRUE。
语法如下 −
boolean contains(Object ob)
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 Java ArrayBlockingQueue 类的 contains() 方法的示例 −
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
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
