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HashMap2Objects.java

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package com.zetcode;

import java.util.HashMap;

import java.util.Map;

import java.util.StringJoiner;

import java.util.stream.Stream;

public class HashMap2Objects {

public static void main(String[] args) {

Map<String, Integer> values = new HashMap<>();

values.put("Ollie", 3);

values.put("Finn", 4);

values.put("Teddy", 6);

values.put("Jasper", 1);

values.put("Lucky", 2);

Stream<Cat> cats = values.entrySet().stream().map(entry ->

new Cat(entry.getKey(), entry.getValue())

);

cats.forEach(System.out::println);

}

}

class Cat {

private String name;

private Integer age;

public Cat(String name, Integer age) {

this.name = name;

this.age = age;

}

@Override

public String toString() {

return new StringJoiner(", ", Cat.class.getSimpleName() + "[", "]")

.add("name='" + name + "'")

.add("age=" + age)

.toString();

}

}