Java - How to convert InputStream to String?

Introduction

In this tutorial, we will learn how to convert InputStream to String in Java.

Example

import java.io.InputStream;
import java.net.URL;

public class InputStreamToString {

 public static void main(String[] args) {
  //very frequent asked question in interview , regarding closable interface 
  try(InputStream inputStream = new URL("https://www.oracle.com/index.html").openStream()){
   System.out.println(convertToString(inputStream));
  }catch (Exception e) {
   // TODO: handle exception
  }
 }
 
 private static String convertToString(InputStream inputStream) throws Exception{
  return new String(inputStream.readAllBytes());
 }
}

Conclusion

Above example is the simplest method to convert an Inpustream to String in Java. There are alternate solutions available like using commonio jar and converting InputStream to ByteStream etc.

Hope you enjoy this tutorial. Happy learning