PriorityBlockingQueue clear() method in Java
The clear() method of PriorityBlockingQueue removes all the elements from this queue. Therefore this method can be applied when it is required to clear the PriorityBlockingQueue.
Syntax:
public void clear()
Parameter:
This method takes no parameters.
Returns:
This method returns nothing.
Exception:
This method does not throw any Exception.
Below program illustrate removing all the elements from PriorityBlockingQueue using clear() method.
Example 1:
import java.util.concurrent.PriorityBlockingQueue;
public class GFG {
public static void main(String[] args)
{
int capacity = 15 ;
PriorityBlockingQueue<Integer> PrioBlockingQueue
= new PriorityBlockingQueue<Integer>(capacity);
PrioBlockingQueue.add( 78758575 );
PrioBlockingQueue.add( 63447688 );
PrioBlockingQueue.add( 56434788 );
System.out.println( "After Adding Numbers:" );
System.out.println( "PriorityBlockingQueue:"
+ PrioBlockingQueue);
PrioBlockingQueue.clear();
System.out.println( "\nAfter clear operation:" );
System.out.println( "PriorityBlockingQueue:"
+ PrioBlockingQueue);
}
}
|
Output:
After Adding Numbers:
PriorityBlockingQueue:[56434788, 78758575, 63447688]
After clear operation:
PriorityBlockingQueue:[]
Example 2: To illustrate clear method on a PriorityBlockingQueue which contains a list of names.
import java.util.concurrent.PriorityBlockingQueue;
public class GFG {
public static void main(String[] args)
{
int capacity = 15 ;
PriorityBlockingQueue<String> PrioBlockingQueue
= new PriorityBlockingQueue<String>(capacity);
PrioBlockingQueue.add( "Tandrima" );
PrioBlockingQueue.add( "Argha" );
PrioBlockingQueue.add( "Arka" );
System.out.println( "List of Names:" );
System.out.println( "PriorityBlockingQueue: "
+ PrioBlockingQueue);
PrioBlockingQueue.clear();
System.out.println( "\nAfter clearing List of names:" );
System.out.println( "PriorityBlockingQueue:"
+ PrioBlockingQueue);
}
}
|
Output:
List of Names:
PriorityBlockingQueue: [Argha, Tandrima, Arka]
After clearing List of names:
PriorityBlockingQueue:[]
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/PriorityBlockingQueue.html#clear–
Last Updated :
26 Nov, 2018
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