Java 10 ArrayList with local variable Var and Different ways to iterate

Java10ArrayListWithLocalVar.java

 package com.java9r;

import java.util.ArrayList;

public class Java10ArrayListWithLocalVar {

 public static void main(String[] args) {

  var products = new ArrayList<Product>();
  var product1 = new Product();
  product1.setId(100);
  product1.setName("Product 1");
  product1.setPrice(55.2);
  product1.setQuantity(20);
  products.add(product1);

  var product2 = new Product();
  product2.setId(101);
  product2.setName("Product 2");
  product2.setPrice(54.2);
  product2.setQuantity(10);
  products.add(product2);

  System.out.println("Iterate list using Enanced for loop");
  System.out.println("======================================");
  for (var product : products) {
   System.out.println("Id: " + product.getId());
   System.out.println("Name: " + product.getName());
   System.out.println("Price: " + product.getPrice());
   System.out.println("Quantity: " + product.getQuantity());
   System.out.println("======================================");
  }

  System.out.println("Iterate list using Stream API");
  System.out.println("======================================");
  products.forEach((product) -> {
   System.out.println("Id: " + product.getId());
   System.out.println("Name: " + product.getName());
   System.out.println("Price: " + product.getPrice());
   System.out.println("Quantity: " + product.getQuantity());
   System.out.println("======================================");
  });

  System.out.println("Iterate list using for loop ");
  System.out.println("======================================");
  for (var i = 0; i < products.size(); i++) {

   System.out.println("Id: " + products.get(i).getId());
   System.out.println("Name: " + products.get(i).getName());
   System.out.println("Price: " + products.get(i).getPrice());
   System.out.println("Quantity: " + products.get(i).getQuantity());
   System.out.println("======================================");
  }

  System.out.println("Iterate list using while loop ");
  System.out.println("======================================");
  var i = 0;
  while (i < products.size()) {

   System.out.println("Id: " + products.get(i).getId());
   System.out.println("Name: " + products.get(i).getName());
   System.out.println("Price: " + products.get(i).getPrice());
   System.out.println("Quantity: " + products.get(i).getQuantity());
   System.out.println("======================================");
   i++;
  }

 }

}
 

Product.java

 package com.java9r;

public class Product {
 private int id;
 private String name;
 private double price;
 private int quantity;
 
 public int getId() {
  return id;
 }
 public void setId(int id) {
  this.id = id;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public double getPrice() {
  return price;
 }
 public void setPrice(double price) {
  this.price = price;
 }
 public int getQuantity() {
  return quantity;
 }
 public void setQuantity(int quantity) {
  this.quantity = quantity;
 }
 


}

Output

Iterate list using Enanced for loop
======================================
Id: 100
Name: Product 1
Price: 55.2
Quantity: 20
======================================
Id: 101
Name: Product 2
Price: 54.2
Quantity: 10
======================================
Iterate list using Stream API
======================================
Id: 100
Name: Product 1
Price: 55.2
Quantity: 20
======================================
Id: 101
Name: Product 2
Price: 54.2
Quantity: 10
======================================
Iterate list using for loop 
======================================
Id: 100
Name: Product 1
Price: 55.2
Quantity: 20
======================================
Id: 101
Name: Product 2
Price: 54.2
Quantity: 10
======================================
Iterate list using while loop 
======================================
Id: 100
Name: Product 1
Price: 55.2
Quantity: 20
======================================
Id: 101
Name: Product 2
Price: 54.2
Quantity: 10
======================================