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How do you convert a file into String in Java?

Deepika Sahu answered on December 24, 2022 Popularity 7/10 Helpfulness 2/10

answer How do you convert a file into String in Java?

How do you convert a file into String in Java?

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package test;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;


/**
 * Java Program to demonstrate different ways to loop over collection in 
 * pre Java 8 and Java 8 world using Stream's forEach method.
 * @author Javin Paul
 */
public class FileToStringJava8 {

    public static void main(String args[]) throws IOException {

        // How to read file into String before Java 7
        InputStream is = new FileInputStream("manifest.mf");
        BufferedReader buf = new BufferedReader(new InputStreamReader(is));
        
        String line = buf.readLine();
        StringBuilder sb = new StringBuilder();
        
        while(line != null){
            sb.append(line).append("\n");
            line = buf.readLine();
        }
        
        String fileAsString = sb.toString();
        System.out.println("Contents (before Java 7) : " + fileAsString);
        
        
        // Reading file into Stirng in one line in JDK 7
        String contents 
              = new String(Files.readAllBytes(Paths.get("manifest.mf")));
        System.out.println("Contents (Java 7) : " + contents);
        
        
        
        // Reading file into String using proper character encoding
        String fileString 
        = new String(Files.readAllBytes(Paths.get("manifest.mf")), 
                    StandardCharsets.UTF_8);
        System.out.println("Contents (Java 7 with character encoding ) : " 
             + fileString);
        

        // It's even easier in Java 8
        Files.lines(Paths.get("manifest.mf"), StandardCharsets.UTF_8)
              .forEach(System.out::println);
        
    }


}

Popularity 7/10 Helpfulness 2/10 Language java

Source: javarevisited.blogspot.com

Tags: file java string

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Contributed on Dec 24 2022

Deepika Sahu

0 Answers Avg Quality 2/10

How do you convert a file into String in Java?

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