import edu.princeton.cs.introcs.BinaryStdIn; import edu.princeton.cs.introcs.StdOut; /************************************************************************* * Compilation: javac BinaryDump.java * Execution: java BinaryDump N < file * Dependencies: BinaryStdIn.java * Data file: http://introcs.cs.princeton.edu/stdlib/abra.txt * * Reads in a binary file and writes out the bits, N per line. * * % more abra.txt * ABRACADABRA! * * % java BinaryDump 16 < abra.txt * 0100000101000010 * 0101001001000001 * 0100001101000001 * 0100010001000001 * 0100001001010010 * 0100000100100001 * 96 bits * *************************************************************************/ public class BinaryDump { public static void main(String[] args) { int BITS_PER_LINE = 16; if (args.length == 1) { BITS_PER_LINE = Integer.parseInt(args[0]); } int count; for (count = 0; !BinaryStdIn.isEmpty(); count++) { if (BITS_PER_LINE == 0) { BinaryStdIn.readBoolean(); continue; } else if (count != 0 && count % BITS_PER_LINE == 0) StdOut.println(); if (BinaryStdIn.readBoolean()) StdOut.print(1); else StdOut.print(0); } if (BITS_PER_LINE != 0) StdOut.println(); StdOut.println(count + " bits"); } }