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io--seek()

 
Greenhorn
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import java.io.*;
public class TestIPApp {
public static void main(String args[]) {
RandomAccessFile file = new RandomAccessFile("test.txt", "rw");
file.writeBoolean(true);
file.writeInt(123456);
file.writeInt(7890);
file.writeLong(1000000);
file.writeInt(777);
file.writeFloat(.0001f);
file.seek(5);
System.out.println(file.readInt());
file.close();
}
}
Select correct answer:
A) 123456
B) 7890
C) 1000000
D) .0001
The ans is B. Can anyone tell me what's the seek (5) means??
Thank you!!
 
Greenhorn
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file.seek(5) sets the file pointer offset just after 5th posn measured from the beginning of this file. The next read occurs from the new position, hence the answer is (b) .
 
Greenhorn
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Hi May,
Seek to the end of the 5th byte. Int occupies 4 bytes (32 bit) and the boolean occupies 1 byte. Hope this (is right) and helps
James
 
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