Create divyasisss2

divyasisss2

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+// Java Program to Implement Behavioral>Iterator Pattern
+
+// importing required package to
+// implement Behavioral>Iterator Pattern
+package com.demo.application;
+
+// Importing required libraries
+// Here Iterator Interface to
+// use it to iterate over the elements
+import java.util.Iterator;
+
+
+// Class 1
+
+// Car Class Implementing Iterable Interface so
+// that we can implement the iterator method and
+// add our own implementation
+
+public class Car implements Iterable<String> {
+private String[] cars;
+private int index;
+
+// Default Constructor
+public Car() {
+	cars = new String[10];
+	index = 0;
+}
+
+// Method 1
+// Adding method to add Cars
+public void addCar(String car) {
+	if (index == cars.length) {
+	String[] largerCars = new String[cars.length + 5];
+	System.arraycopy(cars, 0, largerCars, 0, cars.length);
+	cars = largerCars;
+	largerCars = null;
+	}
+	cars[index] = car;
+	index++;
+}
+
+// Method 2
+// Implementing the iterator method and
+// adding your own implementation
+@Override
+public Iterator<String> iterator() {
+	Iterator<String> it = new Iterator<String>() {
+
+	private int currentIndex = 0;
+
+	// Method 3
+	// Finding whether during iteration if
+	// there is next element or not
+	@Override
+	public boolean hasNext() {
+		return currentIndex < cars.length && cars[currentIndex] != null;
+	}
+
+	// Method 4
+	// Going to grab each car element by one by one
+	// according to the index
+	@Override
+	public String next() {
+		return cars[currentIndex++];
+	}
+
+	// Method 5
+	@Override
+	public void remove() {
+		throw new UnsupportedOperationException();
+	}
+	};
+
+	return it;
+}
+
+// Method 6
+// Main driver method
+public static void main(String[] args) {
+
+	// Instantiating Car object
+	Car cars = new Car();
+
+	// Adding cars to the Array
+	cars.addCar("Dodge");
+	cars.addCar("Ferrari");
+	cars.addCar("Sedan");
+
+	// Creating an Iterator and pointing the cursor
+	// to the index just before the first element in cars
+	Iterator<String> carIterator = cars.iterator();
+
+	// Checking whether the next element is available or not
+	while (carIterator.hasNext()) {
+	System.out.println(carIterator.next());
+	}
+}
+}