Java Map Archives - Huong Dan Java

Sort a Map using Stream and Collectors in Java

In this tutorial, I will show you how to order elements in a Map object using the Stream object and the Collectors object in Java by key and by value. For example, we have a Map object like this:

Map<String, Integer> studentMap = new HashMap<>();
studentMap.put("Khanh", 31);
studentMap.put("Thanh", 25);
studentMap.put("Dung", 35);

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

studentMap.put("Khanh", 31);

studentMap.put("Thanh", 25);

studentMap.put("Dung", 35);

Prior to Java 8, to… Read More

Using Lambda Expression to foreach a Map object in Java

7 years ago by Khanh NguyenJava Basic

In this tutorial, I will show you all how using Lambda Expression to foreach a Map object in Java. OK, let’s get started! Same like List object, the forEach () method is also added to the Map object since Java 8, which gives us more… Read More