Java中的ArrayBlockingQueue size()方法
若要获取队列中的元素数，请使用size()ArrayBlockingQueue类的方法。
语法如下
int size()
要使用ArrayBlockingQueue类，您需要导入以下包
import java.util.concurrent.ArrayBlockingQueue;
以下是实现size()JavaArrayBlockingQueue类的方法的示例
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("Number of elements in the queue = "+q.size());
//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("Number of elements in the queue = "+q.size());
}
}输出结果
ArrayBlockingQueue = [200, 310, 400, 450, 500, 550, 700] The head of the queue = 200 Number of elements in the queue = 6 ArrayBlockingQueue = [310, 400, 450, 500, 550, 700, 50, 70, 90] The head of the queue = 310 Number of elements in the queue = 8