Category Archives: Core Java

This Category contains all the posts related to Core Java

Program to sort the map by value using lambdas and streams in java 8

To sort a Map by value using lambdas and streams in Java 8, you can create a Stream of the map entries, sort them using the Comparator.comparing() method, and then collect them back into a LinkedHashMap. Here’s an example code snippet that demonstrates this approach: Map<String, Integer> unsortedMap = new HashMap<>(); unsortedMap.put(“John”, 75); unsortedMap.put(“Mary”, 82);… Read More »

How to compare two Streams in Java 8

To compare two streams in Java 8, you can use the Stream.allMatch() method along with a lambda expression to define the comparison criteria. Here’s an example code snippet that demonstrates this approach: List<Integer> list1 = Arrays.asList(1, 2, 3, 4, 5); List<Integer> list2 = Arrays.asList(1, 2, 3, 4, 5); boolean isEqual = list1.stream()         .allMatch(list2::contains); System.out.println(isEqual);… Read More »

Which classes in Java are designed for divide-and-conquer algorithms?

Java provides several classes that are useful for implementing divide and conquer algorithms, including: util.Arrays – This class provides methods for sorting and searching arrays. The most commonly used algorithm for sorting an array in Java is the Quicksort algorithm, which is a divide and conquer algorithm. util.Collections – This class provides methods for sorting… Read More »

Differences between Coupling and Cohesion

Coupling and cohesion are both important concepts in software design that describe how different parts of a software system are related to each other. Coupling refers to the degree of interdependence between different modules or components of a software system. It is a measure of how much one component relies on another component in order… Read More »

Understanding the G1 Garbage Collector in java

The G1 Garbage Collector (G1GC) is a garbage collector introduced in Java 7 update 4. It is designed to improve the overall garbage collection performance and reduce GC pause times in large heap sizes. The G1GC is a server-style garbage collector, which means that it is designed to be used in large heap sizes that… Read More »