Question

How to convert InputStream to String in Java

Answer 1

import java.io.InputStream;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.InputStreamReader;
import java.io.IOException;
 
public class MyClass {
    public static void main(String args[]) throws IOException {
        String s = "Java object-oriented programming language";
        InputStream istream = new ByteArrayInputStream(s.getBytes());
        BufferedReader br = new BufferedReader(new InputStreamReader(istream));
         
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line);
        }
         
        br.close();
        
        String istreamtext = sb.toString();
 
        System.out.println(istreamtext);
    }
}
 
 
 
  
/*
run:
     
Java object-oriented programming language
   
*/

 

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Answer 2

import java.io.InputStream;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.stream.Collectors;
import java.io.ByteArrayInputStream;
import java.nio.charset.StandardCharsets;

 
public class MyClass {
    public static void main(String args[]) throws IOException {
        String str = "Java object-oriented programming language";
        
        InputStream istream = new ByteArrayInputStream(str.getBytes());
        
        String istreamtext = new BufferedReader(
                            new InputStreamReader(istream, StandardCharsets.UTF_8))
                            .lines()
                            .collect(Collectors.joining("\n"));

        System.out.println(istreamtext);
    }
}
 
 
 
  
/*
run:
     
Java object-oriented programming language
   
*/

 

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