java Archive

How to create an Array List with Java?

To store dynamically-sized elements in Java, we used ArrayList. Whenever new elements are added to it, its increase their size automatically. Key Points of an ArrayList An ArrayList is a re-sizable array, also known as a dynamic array. It raises its size according to new elements and decreases the size when the elements are removed.

How to return lambda using Java 8?

The first thing, which I am going to show you – how you can easily return lambda as a return type. This is example is very simple and you could adjust it regarding your needs with your domain objects, etc. We are using java.util.function.Function<T, R> interface to return function from our method. T – means

How to compare Strings in Java?

Problem There are many ways how to compare strings in Java and most of them are different. Here we will cover these cases: Using .equals() method; Using .compareTo() method; Using == operator. Solution Let’s check what we can compare using .equals() / .equalsIgnoreCase() methods. If you are newbie in programming / Java – I am almost sure that this

How to read UTF8 file with BOM?

Wikipedia about UTF8 BOM The byte order mark (BOM) is a Unicode character, U+FEFF byte order mark (BOM), whose appearance as a magic number at the start of a text stream can signal several things to a program consuming the text:[1] What byte order, or endianness, the text stream is stored in; The fact that the

How to read a file in Java?

There are many ways to read a file in Java. The simplest and most common used method is using BufferedReader class. First of all, let’s create a file and name it as “example.txt” with some dummy text: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec arcu nibh, maximus porttitor diam eu, dapibus vestibulum nulla.