BufferedReader读取txt资料里的内容不完整。

import java.io.BufferedReader;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import javax.swing.JPanel;//显示好友伸缩界面的实现public class Stretch extends JPanel{    private int FreindGroupNumber;//好友分组数目    private String[] FreindGroupName;//好友分组组名    private int[] FreindTotal;//各分组好友总数    private int[] FrindOnline;//当前在线好友数目    private File file;    private BufferedReader br;    public Stretch(String str) {  //str代表号码        file=new File(str+"/Data.txt");//Data.txt记录一些信息        try {            br=new BufferedReader(new FileReader(file),10);            while(br.readLine()!=null)            {                System.out.println(br.readLine());            }        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }    public static void main(String[] args)    {        new Stretch("549271072");    }}