Thursday, 13 July 2017

How to find the max produce price or min product price using Java 8 Stream | Java 8 streams tutorial


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https://www.youtube.com/watch?v=mOfM7n99KMI&list=UUhwKlOVR041tngjerWxVccw

Product.java
class Product
{
    private int id;
    private String name;
    private int price;

    public Product(int id, String name, int price)
    {
        super();
        this.id = id;
        this.name = name;
        this.price = price;
    }

    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 int getPrice()
    {
        return price;
    }

    public void setPrice(int price)
    {
        this.price = price;
    }

    @Override
    public String toString()
    {
        return "Product [id=" + id + ", name=" + name + ", price="
                + price + "]";
    }

}
StreamDemo.java
import java.util.ArrayList;
import java.util.List;

/**
 *
 * Find Max and Min Product Price.
 *
 */
public class StreamDemo
{
    public static void main(String[] args)
    {
        List<Product> productList = new ArrayList<Product>();

        // Adding Products
        productList.add(new Product(1, "Sony mobile", 25000));
        productList.add(new Product(2, "Lenovo mobile", 15000));
        productList.add(new Product(3, "Nokia mobile", 10000));
        productList.add(new Product(4, "Samsung mobile", 40000));


         // max() method to get max Product price
        Product maxPriceProduct = productList.stream()
                        .max((product1, product2)->
                        product1.getPrice() > product2.getPrice() ? 1: -1).get();

        System.out.println("Max price product = "+maxPriceProduct);

        // min() method to get min Product price
        Product minPriceProduct = productList.stream()
                .min((product1, product2)->
                product1.getPrice() > product2.getPrice() ? 1: -1).get();

        System.out.println("Min price product = "+minPriceProduct);

    }
}
Output
Max price product = Product [id=4, name=Samsung mobile, price=40000]
Min price product = Product [id=3, name=Nokia mobile, price=10000]

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_productList_Max_Min_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_productList_Max_Min_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/0279ebcce40946c6a80779824fa3df4a8c5201d9/BasicJava/StreamDemo_productList_Max_Min_App/?at=master

See also:
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  • Servlets Tutorial
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  • JDBC Tutorial
  • Java Collection Framework Tutorial
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