大神啊，請問。為什么輸出的是問號?。?/h1>
import java.io.*;
class FileInOutEx{
public static void main(String[] args) throws IOException{

File file_Book1 = new File("Book1.txt");
String bookInfo = "世界是平的\t 350.0\t Friedman\t";

file_Book1.createNewFile();?
FileOutputStream fos = new FileOutputStream(file_Book1);
fos.write(bookInfo.getBytes());
fos.close();

FileInputStream fis = new FileInputStream(file_Book1);
System.out.println("書籍名稱\t 價格\t 作者\t");
System.out.println("---------------------------------------");
int i = 0;?
while((i=fis.read()) != -1)
System.out.print((char)i);
fis.close();
}
}

qq_童化金_dwxHIS

2019-03-12

源自：Java入門第三季 5-4

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慕雪0332877
2019-03-26

package com.imooc;

import java.io.File;
import java.io.*;

public class FileInOutEx {
?
?? ?public static void main(String[] args) throws IOException{

File file_Book1 = new File("Book1.txt");

byte[] bookInfo = "世界是好的\t 350.0\t Friedman\t".getBytes();

file_Book1.createNewFile();

FileOutputStream fos = new FileOutputStream(file_Book1);

fos.write(bookInfo);

fos.close();

FileInputStream fis = new FileInputStream(file_Book1);

byte[] byt = new byte[1024];

System.out.println("書籍名稱\t 價格\t 作者\t");

System.out.println("---------------------------------------");

int i = fis.read(byt);

System.out.print(new String(byt,0,i));

fis.close();

}
}