Using the input/output flow programming knowledge: the string "welcome you!" Appended to "D: \ Java directory bianchengti. TXT file at the end, and then read the file, display the content of the text on the screen,

CodePudding user response:

Is it not an InputStream and OutputStream problem?

CodePudding user response:

 
Public static void main (String [] args) {
Scanner scanner=new Scanner(System.in); 
System. The out. Println (" please input string "); 
String input=scanner. The next (); 
FileInputStream fis=null; 
The File File=new File (" D:/test. TXT "); 
Try {
Byte [] buf=new byte [16]. 
Int length=0; 
Fis=new FileInputStream (file); 
The StringBuilder StringBuilder=new StringBuilder (); 
While ((length=fis. Read (buf))!=1) {
StringBuilder. Append (new String (buf, 0, length)); 
} 

System. The out. Println (stringBuilder. ToString ()); 

The stringBuilder. Append (input); 

FileOutputStream fos=new FileOutputStream (file); 
Fos. Write (stringBuilder. ToString () getBytes ()); 
Fis. Close (); 
{} the catch (FileNotFoundException fnfe) 
System. The out. Println (fnfe); 
} the catch (IOException ioe) {
System. The out. Println (ioe); 
} 
}