El método remove(Object obj) de BlockingQueue elimina solo una instancia del Objeto dado, pasado como parámetro, de esta BlockingQueue si está presente. Elimina un elemento e tal que obj.equals(e) y si esta cola contiene una o más instancias del elemento e. Este método devuelve verdadero si esta cola contenía el elemento que ahora se elimina de BlockingQueue.
Sintaxis:
public boolean remove(Object o)
Parámetro: este método acepta un parámetro obligatorio obj , que es el elemento que se eliminará de BlockingQueue.
Valor devuelto: este método devuelve verdadero si esta cola contenía el elemento que ahora se elimina de BlockingQueue. Si BlockingQueue no contenía el elemento obj , este método devuelve false .
Nota : El método remove() de BlockingQueue se ha heredado de la clase Queue en Java.
Los siguientes programas ilustran el método remove(Object obj) de la clase BlockingQueue:
Programa 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); } }
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]
Programa 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(); } } }
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]
Referencia: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/BlockingQueue.html#remove(java.lang.Object)