file 的问题input

Question

import javax.swing.JOptionPane;
import java.io.*;
public class Player {private String playername;
private int playernumber;
private int attend;
private int score;
public Player (String pn,int num, int a, int s)
{
playername=pn;
playernumber= num;
attend=a;
score=s;
}
public String getplayername ()
{
return playername;
}
public int getattend()
{ 
return attend;
}
public int getscore()
{
return score;
}
public int getplayernumber()
{return playernumber;
}public static void Menu()throws IOException
{
Player []dataArray=new Player[4];
int c=6;
      
        
while(c!= 4)
{
String input = JOptionPane.showInputDialog( "1. Enter the player of detail\n" +
"2. Print the detail of player \n" +
                                "3.data is writen to file\n"+
                                "4. Quit\n" +
             "Enter your choice"); c=Integer.parseInt(input);
switch (c)
{
  case 1: Create(dataArray);
              break;
              
  case 2:   print(dataArray);
           break;
           
  case 3:  input(dataArray); 
           break;
   case 4:   JOptionPane.showMessageDialog(null, "Bye ");
              break;
              
  default:   JOptionPane.showMessageDialog(null, "Invalid choice");
     break;        
    }

}


}
public static void Create(Player[] dataArray)throws IOException {
for(int counter=1;counter<dataArray.length;counter++)
{
String pn=JOptionPane.showInputDialog("Please enter  the playername of "+counter);


    String ck=JOptionPane.showInputDialog("Enter the numebr of player of "+counter);
int num=Integer.parseInt(ck);

String d=JOptionPane.showInputDialog("Enter the attend of player of "+counter);
int a =Integer.parseInt(d);

String q=JOptionPane.showInputDialog("Enter the getting score of player of  "+counter);
int s=Integer.parseInt(q);


dataArray[counter]=new Player(pn,num,a,s);

    }
      }  public static void input(Player[] dataArray)throws IOException
   {


final FileWriter outputFile = new FileWriter("kiss.txt");
   final BufferedWriter output= new BufferedWriter(outputFile);
   final PrintWriter printstream = new PrintWriter(output);

for (int i=0; i<dataArray.length; i++)
{
printstream.println(dataArray[i].playername);
printstream.println(dataArray[i].playernumber);
printstream.println(dataArray[i].attend);
     printstream.println(dataArray[i].score);
}
  printstream.close();
  System.out.println("Details are written to file");
   }
public static void main(String[] args)throws IOException

{
Menu();


}
}为什么我的输入的数据``存不进文本kiss.txt里面```帮我看看问题```谢谢````
   

Answer 1

此回复为自动发出,仅用于显示而已，并无任何其他特殊作用
楼主【handsome2t】截止到2008-07-12 00:38:36的历史汇总数据(不包括此帖)：
发帖的总数量:2                        发帖的总分数:50                       每贴平均分数:25                       
回帖的总数量:2                        得分贴总数量:0                        回帖的得分率:0%                       
结贴的总数量:0                        结贴的总分数:0                        
无满意结贴数:0                        无满意结贴分:0                        
未结的帖子数:2                        未结的总分数:50                       
结贴的百分比:0.00  %               结分的百分比:0.00  %                  
无满意结贴率:---------------------无满意结分率:---------------------
如何结贴请参考这里：http://topic.csdn.net/u/20080501/09/ef7ba1b3-6466-49f6-9d92-36fe6d471dd1.html

Answer 2

final PrintWriter printstream = new PrintWriter(output); 
for (int i=0; i <dataArray.length; i++) 
{ 
printstream.println(dataArray[i].playername); 
printstream.println(dataArray[i].playernumber); 
printstream.println(dataArray[i].attend); 
printstream.println(dataArray[i].score); 
} 你的变量的名字起的  真是霸道   看了半天以为你用PrintStream   但原来是PrintWriter恶

Answer 3

你Create的时候counter从1到3，为dataArray[1-3]赋值，没给dateArray[0]赋值，为null.
input的时候i从0开始，dateArray[0].playername等属性肯定报错了。
把Create方法的  for(int counter=1;counter <dataArray.length;counter++)
改成 for(int counter=0;counter <dataArray.length;counter++)

Answer 4

改这个试试：
FileOutputStream fos=new FileOutputStream("kiss.txt");
OutputStreamWriter osw=new OutputStreamWriter(fos);
BufferedWriter bw=new BufferedWriter(osw);
for (int i=0; i <dataArray.length; i++) 
{ 
bw.println(dataArray[i].playername); 
bw.println(dataArray[i].playernumber); 
bw.println(dataArray[i].attend); 
bw.println(dataArray[i].score); 
} 

Answer 5

输出的时候加一条空的输出语句：
System.out.println("");
这样试试