How do I convert a StringReader to a String?

Question

I'm trying to convert my StringReader back to a regular String, as shown:

String string = reader.toString(); 

But when I try to read this string out, like this:

System.out.println("string: "+string); 

All I get is a pointer value, like this:

java.io.StringReader@2c552c55 

Am I doing something wrong in reading the string back?

Answer 1

import org.apache.commons.io.IOUtils;  String string = IOUtils.toString(reader); 

Answer 2

The StringReader's toString method does not return the StringReader internal buffers.

You'll need to read from the StringReader to get this.

I recommend using the overload of read which accepts a character array. Bulk reads are faster than single character reads.

ie.

//use string builder to avoid unnecessary string creation. StringBuilder builder = new StringBuilder(); int charsRead = -1; char[] chars = new char[100]; do{     charsRead = reader.read(chars,0,chars.length);     //if we have valid chars, append them to end of string.     if(charsRead>0)         builder.append(chars,0,charsRead); }while(charsRead>0); String stringReadFromReader = builder.toString(); System.out.println("String read = "+stringReadFromReader);