PriorityQueue 在 Java 中包含()方法
原文:https://www . geesforgeks . org/priorityqueue-contains-method-in-Java/
Java . util . PriorityQueue . contains()方法用于检查 PriorityQueue 中是否存在特定元素。所以基本上它是用来检查一个队列是否包含任何特定的元素。
语法:
Priority_Queue.contains(Object element)
参数:参数元素属于优先级队列类型。这是需要测试队列中是否存在的元素。
返回值:如果元素存在于队列中，该方法返回真，否则返回假。
下面的程序说明了 Java . util . priorityqueue . contains()方法: 程序 1:
// Java code to illustrate contains()
import java.util.PriorityQueue;
public class PriorityQueueDemo {
public static void main(String args[])
{
// Creating an empty PriorityQueue
PriorityQueue<String> queue = new PriorityQueue<String>();
// Use add() method to add elements into the Queue
queue.add("Welcome");
queue.add("To");
queue.add("Geeks");
queue.add("4");
queue.add("Geeks");
// Displaying the PriorityQueue
System.out.println("PriorityQueue: " + queue);
// Check for "Geeks" in the queue
System.out.println("Does the Queue contains 'Geeks'? "
+queue.contains("Geeks"));
// Check for "4" in the queue
System.out.println("Does the Queue contains '4'? "
+queue.contains("4"));
// Check if the Queue contains "No"
System.out.println("Does the Queue contains 'No'? "
+queue.contains("No"));
}
}
Output:
PriorityQueue: [4, Geeks, To, Welcome, Geeks]
Does the Queue contains 'Geeks'? true
Does the Queue contains '4'? true
Does the Queue contains 'No'? false
程序 2:
// Java code to illustrate contains()
import java.util.*;
public class PriorityQueueDemo {
public static void main(String args[])
{
// Creating an empty PriorityQueue
PriorityQueue<Integer> queue = new PriorityQueue<Integer>();
// Use add() method to add elements into the Queue
queue.add(10);
queue.add(15);
queue.add(30);
queue.add(20);
queue.add(5);
// Displaying the PriorityQueue
System.out.println("PriorityQueue: " + queue);
// Check for '15' in the queue
System.out.println("Does the Queue contains '15'? "
+queue.contains(15));
// Check for '2' in the queue
System.out.println("Does the Queue contains '2'? "
+queue.contains(2));
// Check if the Queue contains '10'
System.out.println("Does the Queue contains '10'? "
+queue.contains(10));
}
}
Output:
PriorityQueue: [5, 10, 30, 20, 15]
Does the Queue contains '15'? true
Does the Queue contains '2'? false
Does the Queue contains '10'? true
版权属于：月萌API www.moonapi.com，转载请注明出处
