DB file -Data section.

[James Clinton]

My assignment states UrlBird.

Data section.
Repeat to end of file:
1 byte "deleted" flag. 0 implies valid record, 1 implies deleted record

When I read the field the byte is BLANK! do I need to set this to 0?

here is my code to read in that 1 byte.

 byte[] b= new byte[file.readByte()];
file.readFully(b);
String flag = new String(b,"US-ASCII");
System.out.println(flag); 

Output

 
5 owner 8   // last scheme item
            // where's the flag ???
Palace      // state of first record

Thanks!

[Anton Golovin]

Hi, James. I used the following code to read in a record:

 
int recLength = 159;
byte flag = file.readByte();
byte[] record = new byte[recLength];
file.readFully(record);
String recordAsString = new String(record, "ASCII-US");
 

[ November 11, 2004: Message edited by: Anton Golovin ]

[jiju ka]

Prior to reading the complete record checking whether the record is already deleted or not is better.

If the flag is not valid you don't have to set it to the right one( if the requirement is not saying so). In my asignment flag can be changed during insert or delete.

[James Clinton]

Anton
ASCII-US doesn't work. Are you sure its not US-ASCII ?

String recordAsString = new String(record, "ASCII-US");

Magic Cookie: 257
Total length in bytes in for each record: 159
Number of fields in each record: 7
4 name 64
8 location 64
4 size 4
7 smoking 1
4 rate 8
4 date 10
5 owner 8
java.io.UnsupportedEncodingException: ASCII-US