In this post, we will learn “How to read the content of file to a string in Java 11?”. Java 11 introduced readString() API to do that.
Here, we are going to learn following things:
- What is readString() API?
- How to use it?
Read content of a File to a String in Java 11 using readString methods?...!!! Click To Tweet
Let’s Begin,
1. What is readString() API?
Java 11 introduced two new overloaded methods as part of java.nio.file.Files class.
readString(Path path):
This method reads all content from a file into a string, decoding from bytes to characters using the UTF-8 charset. The method ensures that the file is closed when all content have been read or an I/O error, or other runtime exception, is thrown.
This method is equivalent to: readString(path, StandardCharsets.UTF_8)
readString(Path path, Charset cs):
Reads all characters from a file into a string, decoding from bytes to characters using the specified charset. The method ensures that the file is closed when all content have been read or an I/O error, or other runtime exception, is thrown.
This method reads all content including the line separators in the middle and/or at the end. The resulting string will contain line separators as they appear in the file.
2. How to use it?
Let’s take an example where we have a File (TestingFile.txt) which has some text written on that. Now, we are going to read that and write into a string using readString API.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | import java.io.IOException; import java.nio.file.Files; import java.nio.file.Paths; public class Read_File_To_String_Java11 { public static void main(String[] args) { var File_Path = Paths.get("/Users/d33p4k/Docs/TestingFile.txt"); try { var File_Content = Files.readString(File_Path); System.out.println("String present in the file is: " + File_Content); } catch (IOException ex) { ex.printStackTrace(); } } } |
Output:
1 | String present in the file is: This is just for testing. |
Read content of a File to a String in Java 11 using readString methods?...!!! Click To Tweet
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