Question

Possible Duplicate:
Read a specific line from a text file

Is there any way to read a line in a file in java.I mean if i want to read 100th line only then can i read it directly? Or I have to read the whole file until it comes to line 100.

Answer 1

You can use java.io.RandomAccessFile.

Moving to 100th line use the following lines:

RandomAccessFile file = new RandomAccessFile("D:\\test.txt", "rw");
int totalLines = (int)file.length();
file.seek(100);
long pointer = file.getFilePointer();


for(int pt = 100; ct < totalLines; ct++){
  byte b = file.readByte(); //read byte from the file
  System.out.print((char)b); //convert byte into char
}

file.close();

For more details please see the below link which will helps you:
http://tutorials.jenkov.com/java-io/randomaccessfile.html