reading multiple files from a directory and writing them into a single file

i have done the following code but the every time i write to the single file i get an empty text file can you guide me how to do this:

/*this program reads multiple files 
 * from a single directory. */
package elite.tech.com;

import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;

public class reader {

    static String inpath = "C:\\Users\\ndayala\\asc";
    static String outpath = "C:\\Users\\ndayala\\bin\\bin.txt";

    public static void main(String[]args) throws IOException{
        File Folder = new File(inpath);
        File files[];
        files = Folder.listFiles();




        if(files.length>1)
        {
            for(int i = 0;i<files.length; i++){
                System.out.println("reading...");
                System.out.println(files[i]);
                Reader in = new FileReader(files[i]);
                Writer out = new FileWriter(outpath , false); 

                // should be in finally block
                in.close();
                out.close(); 
            }
        }
        else{
            System.out.println("found only one file...");
            System.out.println(files);
        }


    }

}