Java – Read a file from resources folder
In Java, we can use getResourceAsStream or getResource to read a file or multiple files from a resources folder or root of the classpath. The getResourceAsStream method returns an InputStream.…
How to create a file in Java
In Java, there are many ways to create and write to a file: using Files.newBufferedWriter (Java 8), using Files.write (Java 7), using PrintWriter, using File.createNewFile
How to read file in Java – BufferedReader
In this article, we will show you how to use java.io.BufferedReader to read content from a file: using Files.newBufferedReader (Java 8), using classic BufferedReader with JDK 1.7 try-with-resources to auto…
How to convert String to InputStream in Java
In Java, we can use ByteArrayInputStream to convert a String to an InputStream. We will examine how to use ByteArrayInputStream to convert a String to an InputStream and saves it…
How to convert InputStream to File in Java
Below are some Java examples of converting InputStream to a File. Plain Java – FileOutputStream, Apache Commons IO – FileUtils.copyInputStreamToFile, Java 7 – Files.copy, Java 9 – InputStream.transferTo
How to convert InputStream to String in Java
This article shows a few ways to convert an java.io.InputStream to a String. We will examine a few ways: using ByteArrayOutputStream, using InputStream#readAllBytes (Java 9), using InputStreamReader + StringBuilder, InputStreamReader…
How to convert String to int in Java
In Java, we can use Integer.parseInt(String) to convert a String to an int; For unparsable String, it throws NumberFormatException. We will examine deeply on how to convert String to primitive…
How to convert String to Integer in Java
In Java, we can use Integer.valueOf(String) to convert a String to an Integer object; For unparsable String, it throws NumberFormatException. We will examine deeply on how to convert a String…
Java – How to check if a String is numeric
Few Java examples to show you how to check if a String is numeric. We have several ways to check numeric string: using Character.isDigit(), using NumberUtils.isDigits() from Apache Commons Lang
How to split a string in Java
In Java, we can use String#split() to split a string. We will examine deeply many ways or options to split a string.