如果存在,则BlockingQueue的remove(Object obj)方法仅从此BlockingQueue中删除作为参数传递的给定对象的一个实例。如果此队列包含元素e的一个或多个实例,它将删除obj.equals(e)这样的元素e。如果此队列包含现在已从BlockingQueue中删除的元素,则此方法返回true。
用法:
public boolean remove(Object o)
参数:此方法接受强制参数obj,这是要从BlockingQueue中删除的元素。
返回值:如果此队列包含现在已从BlockingQueue中删除的元素,则此方法返回true。如果BlockingQueue不包含元素obj,则此方法返回false。
注意:BlockingQueue的remove()方法已从Java中的Queue类继承。
以下示例程序旨在说明BlockingQueue类的remove(Object obj)方法:
示例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);
}
}
输出:
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]
示例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();
}
}
}
输出:
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]
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注:本文由纯净天空筛选整理自gopaldave大神的英文原创作品 BlockingQueue remove() method in Java with examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。