JAVA IO - Output/InputStream to Writer/Reader

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;


public class WriterReaderTest {
    public static void main(String args[]) throws Exception{
    	Writer writer =new OutputStreamWriter(new FileOutputStream("c:\\work\\hello\\helloworld.txt"));
    	writer.write("This is a test");
    	writer.close();
    	Reader reader = new InputStreamReader(new FileInputStream("c:\\work\\hello\\helloworld.txt"));
    	char[] cs = new char[1024];
    	int len = -1;
    	if((len = reader.read(cs)) != -1){
    		System.out.println(new String(cs, 0, len));
    	}
    }
}