ArrayBlockingQueue toString() Method in Java
Last Updated :
26 Nov, 2018
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The toString() method of ArrayBlockingQueue class is used to get a string representation of the objects of ArrayBlockingQueue. The string of ArrayBlockingQueue contains elements of ArrayBlockingQueue in the order from first(head) to last(tail), enclosed in square brackets("[]"). The elements are separated by the characters", " (comma and a space). So basically the toString() method is used to convert all the elements of ArrayBlockingQueue into a String.
Syntax:
Java
Java
public String toString()Return Value: The method returns an String representation of ArrayBlockingQueue. Below programs illustrates toString() method of ArrayBlockingQueue class: Program 1:
// Program to demonstrate how to apply toString() method
// of ArrayBlockingQueue Class.
import java.util.concurrent.ArrayBlockingQueue;
public class GFG {
public static void main(String[] args) {
// Define capacity of ArrayBlockingQueue
int capacity = 5;
// Create object of ArrayBlockingQueue
ArrayBlockingQueue<Integer> queue =
new ArrayBlockingQueue<Integer>(capacity);
// Add 5 elements to ArrayBlockingQueue
queue.offer(423);
queue.offer(422);
queue.offer(421);
queue.offer(420);
queue.offer(424);
// Print queue
System.out.println("Queue is "+queue);
// Call toString() method and Create an iterator
String stringRepresentation=queue.toString();
// Print String value returned by toString() method
System.out.println("\nThe String returned by toString():");
System.out.println(stringRepresentation);
}
}
Output:
Program 2:
Queue is [423, 422, 421, 420, 424] The String returned by toString(): [423, 422, 421, 420, 424]
// Program Demonstrate how to apply toString() method
// of ArrayBlockingQueue Class.
import java.util.concurrent.ArrayBlockingQueue;
public class GFG {
public static void main(String[] args) {
// Define capacity of ArrayBlockingQueue
int capacity = 10;
// Create object of ArrayBlockingQueue
ArrayBlockingQueue<String> queue =
new ArrayBlockingQueue<String>(capacity);
// Add 5 elements to ArrayBlockingQueue
queue.offer("User");
queue.offer("Employee");
queue.offer("Manager");
queue.offer("Analyst");
queue.offer("HR");
queue.offer("Tester");
// Print queue
System.out.println("Queue is "+queue);
// Call toString() method and Create an iterator
String stringRepresentation=queue.toString();
// Print String value returned by toString() method
System.out.println("\nThe String returned by toString():");
System.out.println(stringRepresentation);
}
}
Output:
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ArrayBlockingQueue.html#toString
Queue is [User, Employee, Manager, Analyst, HR, Tester] The String returned by toString(): [User, Employee, Manager, Analyst, HR, Tester]
