Ruang untuk merangkai pengetahuan, satu baris kode setiap hari.
Temukan tutorial, ide, dan catatan dari perjalanan belajar.
Pelajari alur filter, map, dan collect untuk mengolah data Java dengan kode yang mudah dibaca.
You want to convert numbers into their Roman numerals representation and vice versa. The solution here is to tackle the problem as a unary problem where the Roman numerals represented as a single element, the “I” character. We start by representing the number as a repeated sequence of the “I” characters. And then replace the […]
The following code snippet show you how to send POST request with a JSON body using HttpClient. The payload in this example is a user information containing id, first_name and a last_name. We placed the payload in an object called StringEntity and also set its content type to ContentType.APPLICATION_FORM_URLENCODED. On the other end called by […]
The following code snippet will teach you how to align string in left, right or center alignment when you want to print out string to a console. We will print the string using the printf(String format, Object… args) method. The format specifier / parameter defines how the string will be formatted for output and the […]
To sort file names by their extension, we can use the ExtensionFileComparator class from the Apache Commons IO library. This class provides a couple instances of comparator such as: Comparator Description EXTENSION_COMPARATOR Case sensitive extension comparator EXTENSION_REVERSE Reverse case sensitive extension comparator EXTENSION_INSENSITIVE_COMPARATOR Case insensitive extension comparator EXTENSION_INSENSITIVE_REVERSE Reverse case insensitive extension comparator EXTENSION...
In this example, you will learn how to sort files and directories based on their size. Using the Apache Commons IO, we can utilize the SizeFileComparator class. This class provides some instances to sort file size such as: Comparator Description SIZE_COMPARATOR Size comparator instance – directories are treated as zero size SIZE_REVERSE Reverse size comparator […]
The following example show how to use the Apache Commons IO library to read a text file line by line to a List of String. In the code snippet below we will read the contents of a file called sample.txt using FileUtils class. We use FileUtils.readLines() method to read the contents line by line and […]
Simpan rasa ingin tahu. Selalu ada hal baru untuk dipelajari.
Penulis dan pendiri Diary Coding — berbagi catatan, tutorial, dan pengalaman seputar pemrograman untuk siapa pun yang ingin terus belajar.