The remove(Object obj) method of BlockingQueue removes only one instance of the given Object, passed as parameter, from this BlockingQueue if it is present. It removes an element e such that obj.equals(e) and if this queue contains one or more instance of element e. This method returns true if this queue contained the element which is now removed from BlockingQueue.
Syntax:
public boolean remove(Object o)
Parameter: This method accepts a mandatory parameter obj which is the element to be removed from BlockingQueue.
Return Value: This method returns true if this queue contained the element which is now removed from BlockingQueue. If the BlockingQueue did not contain the element obj, then this method returns false.
Note: The remove() method of BlockingQueue has been inherited from the Queue class in Java.
Below programs illustrates remove(Object obj) method of BlockingQueue class:
Program 1:
// Java Program Demonstrate remove(Object obj)// method of BlockingQueue import java.util.concurrent.LinkedBlockingQueue;import java.util.concurrent.BlockingQueue; public class GFG { public static void main(String[] args) throws InterruptedException { // define capacity of BlockingQueue int capacityOfQueue = 4; // create object of BlockingQueue BlockingQueue<String> BQ = new LinkedBlockingQueue<String>(capacityOfQueue); // Add element using put() method BQ.put("Karan"); BQ.put("Suraj"); BQ.put("Harsh"); BQ.put("Rahul"); // print elements of queue System.out.println("Items in Queue are " + BQ); // try to remove Karan from Queue using remove() boolean try1 = BQ.remove("Karan"); // Print result of remove() System.out.println("String name Karan is removed :" + try1); // try to remove Sunny from Queue using remove() boolean try2 = BQ.remove("Sunny"); // Print result of remove() System.out.println("String name Sunny is removed :" + try2); // try to remove Sunny from Queue using remove() boolean try3 = BQ.remove("Harsh"); // Print result of remove() System.out.println("String name Harsh is removed :" + try2); // print queue System.out.println("After Removing Some Elements:"); System.out.println("Items in Queue are " + BQ); }} |
Output:
Items in Queue are [Karan, Suraj, Harsh, Rahul] String name Karan is removed :true String name Sunny is removed :false String name Harsh is removed :false After Removing Some Elements: Items in Queue are [Suraj, Rahul]
Program 1:
// Java Program Demonstrate remove(object obj)// method of BlockingQueue import java.util.Iterator;import java.util.concurrent.LinkedBlockingQueue;import java.util.concurrent.BlockingQueue;public class GFG { public void removeDemo() throws InterruptedException { // define capacity of BlockingQueue int capacityOfQueue = 5; // create object of BlockingQueue BlockingQueue<Employee> BQ = new LinkedBlockingQueue<Employee>(capacityOfQueue); // Add element to LinkedBlockingQueue Employee emp1 = new Employee("Ranjeet", "Tester", "29000", 27); Employee emp2 = new Employee("Sanjeet", "Manager", "98000", 34); Employee emp3 = new Employee("Karan", "Analyst", "44000", 30); // Add Employee Objects to BQ Using put(E e) BQ.put(emp1); BQ.put(emp2); BQ.put(emp3); // print details of BQ System.out.println("Before removing Elements"); Iterator itr = BQ.iterator(); while (itr.hasNext()) System.out.println(itr.next()); // remove employee2 name Sanjeet from BQ // Using remove(Object obj) method BQ.remove(emp2); // Also remove Ranjeet employee1 from BQ // Using remove(Object obj) method BQ.remove(emp1); // print details of BQ System.out.println("After removing Some Elements"); itr = BQ.iterator(); while (itr.hasNext()) System.out.println(itr.next()); } // create an Employee Object with name, // position, salary and age as attributes public class Employee { public String name; public String position; public String salary; public int Age; Employee(String name, String position, String salary, int age) { this.name = name; this.position = position; this.salary = salary; this.Age = age; } @Override public String toString() { return "Employee [name=" + name + ", position=" + position + ", salary=" + salary + ", Age=" + Age + "]"; } } // Main Method public static void main(String[] args) { GFG gfg = new GFG(); try { gfg.removeDemo(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } }} |
Output:
Before removing Elements Employee [name=Ranjeet, position=Tester, salary=29000, Age=27] Employee [name=Sanjeet, position=Manager, salary=98000, Age=34] Employee [name=Karan, position=Analyst, salary=44000, Age=30] After removing Some Elements Employee [name=Karan, position=Analyst, salary=44000, Age=30]
