The toString() method of LinkedBlockingQueue returns a String representation of the elements of LinkedBlockingQueue. The string of LinkedBlockingQueue contains its elements from first(head) to last(tail), enclosed in square brackets(“[]”) in proper order. The elements are separated by the characters ‘, ‘ (comma and a space). So basically the toString() method is used to convert all the elements of LinkedBlockingQueue into a String representation.
This method overrides the toString() in class AbstractCollection<E>
Syntax:
public String toString()
Return Value: This method returns a String which is the representation of the elements of LinkedBlockingQueue from first(head) to last(tail), enclosed in square brackets(“[]”) in proper order,separated by the ‘, ‘ (comma and a space).
Below programs illustrates toString() method of LinkedBlockingQueue class:
Program 1:
// Java Program Demonstrate toString()// method of LinkedBlockingQueue import java.util.concurrent.LinkedBlockingQueue; public class GFG { public static void main(String[] args) { // define capacity of LinkedBlockingQueue int capacityOfQueue = 50; // create object of LinkedBlockingQueue LinkedBlockingQueue<Integer> linkedQueue = new LinkedBlockingQueue<Integer>(capacityOfQueue); // Add element to LinkedBlockingQueue linkedQueue.add(2300); linkedQueue.add(1322); linkedQueue.add(8945); linkedQueue.add(6512); // toString() on linkedQueue String queueRepresentation = linkedQueue.toString(); // print results System.out.println("Queue Representation:"); System.out.println(queueRepresentation); }} |
Queue Representation: [2300, 1322, 8945, 6512]
// Java Program Demonstrate toString()// method of LinkedBlockingQueue. import java.util.concurrent.LinkedBlockingQueue; public class GFG { // create an Employee Object with // position and salary as an attribute public class Employee { public String name; public String position; public String salary; Employee(String name, String position, String salary) { this.name = name; this.position = position; this.salary = salary; } @Override public String toString() { return "Employee [name=" + name + ", position=" + position + ", salary=" + salary + "]"; } } // Main Method public static void main(String[] args) { GFG gfg = new GFG(); gfg.stringRepresentation(); } public void stringRepresentation() { // define capacity of LinkedBlockingQueue int capacity = 50; // create object of LinkedBlockingQueue LinkedBlockingQueue<Employee> linkedQueue = new LinkedBlockingQueue<Employee>(capacity); Employee emp1 = new Employee("Aman", "Analyst", "24000"); Employee emp2 = new Employee("Sachin", "Developer", "39000"); // Add Employee Objects to linkedQueue linkedQueue.add(emp1); linkedQueue.add(emp2); // toString() on linkedQueue String queueRepresentation = linkedQueue.toString(); // print results System.out.println("Queue Representation:"); System.out.println(queueRepresentation); }} |
Queue Representation: [Employee [name=Aman, position=Analyst, salary=24000], Employee [name=Sachin, position=Developer, salary=39000]]
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/LinkedBlockingQueue.html#toString–
