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Debojyoti Chakraborty
Debojyoti Chakraborty

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Trick to read all the content of a file in java

#java #computerscience #file

Hello I recently need to write a program where I need to find the duplicates book title from a given text file and store it in a output file.

But it's quite difficult to read file in java as there are many options available but after searching the internet I found the awesome process where you can read the file just with few lines of code.

Let's see the code

//required imports //such as file handling java.io //and java.files import java.io.*; import java.util.Iterator; import java.io.IOException; import java.nio.charset.StandardCharsets; import java.nio.file.Files; import java.nio.file.Paths; import java.util.Collections; import java.util.List; //utility class for read the file in line and store it in //an array and return it. class OpenFileExample6 { //functions static to call from outside to the class public static List<String> readFileInList(String fileName) { //craeted a list of strings to store all the title from the file List<String> lines = Collections.emptyList(); //required try catch block to avoid any Input Output Exception and program can run //without any error try { lines = Files.readAllLines(Paths.get(fileName), StandardCharsets.UTF_8); } catch (IOException e) { e.printStackTrace(); } //return the string of array return lines; } }
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Above code I used to read all the content from the file the magic is happened by these lines

try { lines = Files.readAllLines(Paths.get(fileName), StandardCharsets.UTF_8); } catch (IOException e) { e.printStackTrace(); }
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Great now it's your turn to use it in java to read the file and don't forget to import java.nio library.

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