Reading a File into a Java String: Modern Techniques

Java provides multiple ways to read the entire contents of a file into a single String. From traditional methods using BufferedReader to modern approaches with NIO utilities, there’s a technique to suit different Java versions and project requirements. Here’s a guide to some of the most popular methods, including options for Java 7 and newer, as well as some third-party alternatives.

1. Using Files.readString() in Java 11+

For Java 11 and later, the Files.readString() method offers a simple and efficient way to read the entire content of a file into a String. This method preserves line terminators.

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