Java 中的 PriorityBlockingQueue remaingccapacity()方法
原文:https://www . geeksforgeeks . org/priorityblockingqueue-remainingcapacity-method-in-Java/
优先级阻塞队列 的剩余容量方法用于检查该队列还能插入多少元素。但是由于 PriorityBlockingQueue 是无界的，这个方法总是返回整数。最大值因为优先级阻塞队列不受容量限制。 语法:
public int remainingCapacity()
返回值:整数。最大值始终 下面的程序说明了优先级阻塞队列中的剩余容量()方法: T4】程序 1:T6】
Java 语言(一种计算机语言，尤用于创建网站)
// Java Program Demonstrate remainingCapacity()
// method of PriorityBlockingQueue
import java.util.concurrent.PriorityBlockingQueue;
public class GFG {
public static void main(String[] args)
{
// define capacity of PriorityBlockingQueue
int capacityOfQueue = 7;
// create object of PriorityBlockingQueue
PriorityBlockingQueue<Integer> pbq
= new PriorityBlockingQueue<Integer>(capacityOfQueue);
// Add element to PriorityBlockingQueue
pbq.put(1);
pbq.put(2);
pbq.put(3);
pbq.put(4);
// find remaining Capacity of pbq
// using remainingCapacity() method
// The initial capacity was set to 7
// by passing as parameter in constructor
// But this method will return Integer.MAX_VALUE
int remainingCapacity = pbq.remainingCapacity();
// print result
System.out.println("Queue: " + pbq);
System.out.println("Remaining Capacity: " + remainingCapacity);
}
}
Output:
Queue: [1, 2, 3, 4]
Remaining Capacity: 2147483647
程序 2: 使用字符串 演示剩余容量()
Java 语言(一种计算机语言，尤用于创建网站)
// Java Program Demonstrate remainingCapacity()
// method of PriorityBlockingQueue
import java.util.concurrent.PriorityBlockingQueue;
public class GFG {
public static void main(String[] args)
{
// create object of PriorityBlockingQueue
PriorityBlockingQueue<String> pbq
= new PriorityBlockingQueue<String>();
// Add element to PriorityBlockingQueue
pbq.put("Geeks");
pbq.put("forGeeks");
pbq.put("A Computer");
pbq.put("Portal");
// find remaining Capacity of pbq
// using remainingCapacity() method
int remainingCapacity = pbq.remainingCapacity();
// print result
System.out.println("Queue: " + pbq);
System.out.println("Remaining Capacity: " + remainingCapacity);
}
}
Output:
Queue: [A Computer, Portal, Geeks, forGeeks]
Remaining Capacity: 2147483647
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