Token Parsing Error: Lexical error

I am getting the following error when I use a BeanshellPostProcessor to regex some data and write to file:

2015/06/11 12:11:19 ERROR - jmeter.util.BeanShellInterpreter: Error invoking bsh method: eval   Sourced file: inline evaluation of: ``    import java.io.FileOutputStream;     import java.util.Map;     import java.u . . . '' Token Parsing Error: Lexical error at line 10, column 45.  Encountered: "d" (100), after : "\"c:\\" 
2015/06/11 12:11:19 WARN  - jmeter.extractor.BeanShellPostProcessor: Problem in BeanShell script org.apache.jorphan.util.JMeterException: Error invoking bsh method: eval   Sourced file: inline evaluation of: ``    import java.io.FileOutputStream;     import java.util.Map;     import java.u . . . '' Token Parsing Error: Lexical error at line 10, column 45.  Encountered: "d" (100), after : "\"c:\\" 

My code:

import java.io.FileOutputStream;
import java.util.Map;
import java.util.Set;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.*;

String entirePage = new String(data);

FileWriter fstream = new FileWriter("c:\\downloads\\results.txt",true);
BufferedWriter out = new BufferedWriter(fstream);

Pattern totalNetValue = Pattern.compile("totalNetValue\">([^\"]+)</span>");

Matcher mTotalNetValue = totalNetValue.matcher(entirePage);
    mTotalNetValue.find();
//out.write(${date});
    out.write(mTotalNetValue.group(1));
out.write("\n");

out.close();

Any ideas what's wrong with my code? Thanks :-)

Copyright Notice：Content Author:「ratsstack」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/30769498/token-parsing-error-lexical-error