Java Programming

Hello All,
we have application which is on swings,
in our application we have module called Report Generation
here in Report module we are generating the report and writing or saving it in .XML extension file.
for writing .XMl extension is the following is the code

writingReport() {
 String filename = System.getProperty("user.home") +"/Report.xml";
                System.out.println("XML Report file path" +filename);
                File myfile = new File(filename);
                FileWriter mywriter = null;
                BufferedReader reader = null;
                try{
                    mywriter = new FileWriter(myfile);
                     System.out.println("Now I'm reading each line from Online-Report and Displaying each line");
                    // Reading from Online-Report .
                    reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                    // where 'conn' is URLConnection   
                    String line = "";
                    System.out.println("*************Each Line Display from Online Report***************");
                    while ((line = reader.readLine()) != null) {
                        
                        System.out.println(line);
                        mywriter.write(line);
                    //    System.out.println("Each Line Display from Report.XML" +line);
                    }
                    System.out.println("Report has been written to " + myfile );
                    System.out.println(myfile +"is a Temproray file,deleted after once reading the content");
                    reader.close();
                    mywriter.close();
                }catch(Exception e){
                    e.printStackTrace();
                    try {
                        reader.close();
                        mywriter.close();
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
                }
}

For the above i'm getting following error
Exception in thread "Thread-6" java.lang.OutOfMemoryError: Java heap space
Output For above code:-
XML Report file pathC:\Documents and Settings\Administrator/Report.xml
Now I'm reading each line from Online-Report and Displaying each line
*************Each Line Display from Online Report***************
<?xml version="1.0" standalone="yes"?>

Exception in thread "Thread-6" java.lang.OutOfMemoryError: Java heap space


1: How can we increase the heap memory?
2: What is Default size of the BufferedReader ? is there any possiblity of increasing the BufferedReader ?

Please acknoweldge me...


Thanks in advance
Anil Patil