java学习笔记 处理流之数据流

import java.io.*;

public class Test {
    public static void main(String[] args) {
        try {
            File f = new File("e:\\java\\aaa.txt");
            DataOutputStream dos = new DataOutputStream(new FileOutputStream(f));
            String strs[] = {"衬衣","手套","围巾"};
            float  prices[] = {98.3f,30.3f,50.5f};
            int nums[] = {3,2,1};
            for (int i = 0;i < strs.length;i++) {
                dos.writeChars(strs[i]);
                dos.writeChar(‘\t‘);
                dos.writeFloat(prices[i]);
                dos.writeChar(‘\t‘);
                dos.writeInt(nums[i]);
                dos.writeChar(‘\n‘);    
            } 
            dos.close();
            DataInputStream dis = new DataInputStream(new FileInputStream(f));
            char temp[];
            String str;
            Float price = 0f;
            int num = 0;
                    char c;
                    temp = new char[100];
                    for(int j = 0;j < strs.length;j++){
                        int len = 0;
                        while((c = dis.readChar()) != ‘\t‘) {
                            temp[len] = c;
                            len++;
                        }    
                      str = new String(temp ,0,len);
                      //dis.readChar();？
                      price = dis.readFloat();
                      dis.readChar();
                      num = dis.readInt();
                      dis.readChar();
                      System.out.printf("商品名称： %s;价格： %5.2f;数量： %d\n",str,price,num);
              }
              //dis.close();?没有close()方法？
        }catch(IOException e) {
            e.printStackTrace();    
        }    
    }    
}

/*
EOFException io流意外达到文件结尾
*/