Java PriorityQueue - contains() Method
The java.util.PriorityQueue.contains() method is used to check whether the queue contains the specified element or not. It returns true if the queue contains the specified element, else returns false.
Syntax
public boolean contains(Object obj)
Parameters
obj |
Specify element whose presence in the queue need to be tested. |
Return Value
Returns true if the queue contains the specified element, else returns false.
Exception
NA
Example:
In the example below, the java.util.PriorityQueue.contains() method is used to check the presence of specified element in the given queue.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a priority queue
PriorityQueue<Integer> PQueue = new PriorityQueue<Integer>();
//populating the priority queue
PQueue.add(10);
PQueue.add(20);
PQueue.add(30);
PQueue.add(40);
PQueue.add(50);
//checking the presence of elements
for(int i = 5; i <= 20; i += 5) {
if(PQueue.contains(i))
System.out.println(i +" is present in PQueue.");
else
System.out.println(i +" is NOT present in PQueue.");
}
}
}
The output of the above code will be:
5 is NOT present in PQueue. 10 is present in PQueue. 15 is NOT present in PQueue. 20 is present in PQueue.
❮ Java.util - PriorityQueue
