RandomAccessFile: read(byte[] b)


import java.io.RandomAccessFile;

public class Main {
  public static void main(String[] args) throws Exception {
    RandomAccessFile randomAccessFile = null;

    String line1 = "line\n";
    String line2 = "asdf1234\n";

    // read / write permissions
    randomAccessFile = new RandomAccessFile("yourFile.dat", "rw");

    randomAccessFile.writeBytes(line1);
    randomAccessFile.writeBytes(line2);

    // Place the file pointer at the end of the first line
    randomAccessFile.seek(line1.length());

    byte[] buffer = new byte[line2.length()];
    randomAccessFile.read(buffer);
    System.out.println(new String(buffer));

    randomAccessFile.close();
  }
}
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RandomAccessFile:
  1. RandomAccessFile
  2. new RandomAccessFile(String fileName, String mode)
  3. RandomAccessFile: close()
  4. RandomAccessFile: getChannel()
  5. RandomAccessFile: getFilePointer()
  6. RandomAccessFile: length()
  7. RandomAccessFile: read(byte[] b)
  8. RandomAccessFile: readBoolean()
  9. RandomAccessFile: readByte()
  10. RandomAccessFile: readChar()
  11. RandomAccessFile: readDouble()
  12. RandomAccessFile: readInt()
  13. RandomAccessFile: readLine()
  14. RandomAccessFile: seek(long pos)
  15. RandomAccessFile: write(byte[] b)
  16. RandomAccessFile: writeBoolean(boolean v)
  17. RandomAccessFile: writeBytes(String s)
  18. RandomAccessFile: writeChars(String s)
  19. RandomAccessFile: writeInt(int v)
  20. RandomAccessFile: writeUTF(String str)