Java ArrayBlockingQueue forEach() Method

The forEach() method of Java ArrayBlockingQueue class executes the specified action for each element of Iterable till all the elements are processed or the action throws an exception.

Syntax:

Parameters:

action - This is the action to be performed for every element.

Specified By:

The forEach() method of ArrayBlockingQueue class is specified by forEach() method in interface Iterable<E>.

Throws:

The forEach() method throws NullPointerException, if the defined action represents null.

Example 1

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
public class ArrayBlockingQueueForEachExample1 {
    public static void main(String[] args) {
        int capacity =100;
        BlockingQueue<String> queue = new ArrayBlockingQueue<String>(capacity);
        queue.add("Reema");
        queue.add("Rahul");
        queue.add("Rita");
        queue.add("Ramesh");
        System.out.println(queue);
        System.out.println("\nPrinting the queue with the help of foreach loop: ");
        //foreach() will perform the given action for each element
        for (String xyz: queue) {
            System.out.println(xyz);
        }
    }
}

Output:

[Reema, Rahul, Rita, Ramesh]

Printing the queue with the help of foreach loop: 
Reema
Rahul
Rita
Ramesh

Example 2

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
class Student {
    static int i = 1;
    public String name;
    public String college;
    String rollNo;
    Student(String rollNo, String college, String name) {
        this.rollNo = rollNo;
        this.name = name;
        this.college = college;
    }
    public String toString() {
        return i++ + ".Roll No. =  " + this.rollNo + "\n  College =  " + this.college + "\n  Name = " + this.name + "\n";
    }
}
public class ArrayBlockingQueueForEachExample2 {
    public static void main(String[] args) {
        Student student1 = new Student("15cs1029", "MVN University", "Reema");
        Student student2 = new Student("15cs1010", "MVN University", "Geetanjali");
        Student student3 = new Student("17cs1029", "MR University", "Vineet");
        Student student4 = new Student("15cs1011", "MVN University", "Himanshu");
        int capacity = 100;
        BlockingQueue<Student> queue = new ArrayBlockingQueue<Student>(capacity);
        queue.add(student1);
        queue.add(student2);
        queue.add(student3);
        queue.add(student4);
      //foreach() will perform the given action for each element
        for (Student xyz : queue) {
                System.out.println(xyz);
        }
    }
}

Output:

1.Roll No. =  15cs1029
  College =  MVN University
  Name = Reema

2.Roll No. =  15cs1010
  College =  MVN University
  Name = Geetanjali

3.Roll No. =  17cs1029
  College =  MR University
  Name = Vineet

4.Roll No. =  15cs1011
  College =  MVN University
  Name = Himanshu

Example 3

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
public class ArrayBlockingQueueForEachExample3 {
    static int i =0;
    static int capacity =100;
    public static void main(String[] args) {
        // create a ArrayBlockingQueue
        BlockingQueue<String> queue = new ArrayBlockingQueue<String>(capacity);
        //  Adding items add() to the tail of queue
        queue.add("aman");
        queue.add("bhavika");
        //foreach() will perform the given action for each element
        for (String val : queue) {
            String upperCase = val.toUpperCase();
            System.out.println(++i + " Lower case = " + val);
            System.out.println("  Upper case = " + upperCase);
            System.out.println();
        }
    }
}

Output:

1 Lower case = aman
  Upper case = AMAN

2 Lower case = bhavika
  Upper case = BHAVIKA

Example 4

import java.util.Collections;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
public class ArrayBlockingQueueForEachExample4 {
    public static void main(String[] args) {
        Integer[] val = {0, 1};
        int capacity = 100;
        BlockingQueue<Integer> queue = new ArrayBlockingQueue<Integer>(capacity);
        queue.add(71018);
        queue.add(8000);
        queue.add(1178);
        queue.add(1190);
    //foreach() will perform the given action for each element
        for (Integer n : queue) {
            System.out.println(n);
            val[0] = Collections.max(queue);
            val[1] = Collections.min(queue);
        }
        System.out.println("Max number = "+ val[0]);
        System.out.println("Min number = "+ val[1]);
    }
}

Output:

71018
8000
1178
1190
Max number = 71018
Min number = 1178

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Java ArrayBlockingQueue forEach() Method

Syntax:

Parameters:

Specified By:

Throws:

Example 1

Example 2

Example 3

Example 4

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Java ArrayBlockingQueue forEach() Method

Syntax: