PictureDump.java
3.2 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
/******************************************************************************
* Compilation: javac PictureDump.java
* Execution: java PictureDump width height < file
* Dependencies: BinaryStdIn.java Picture.java
* Data file: http://introcs.cs.princeton.edu/stdlib/abra.txt
*
* Reads in a binary file and writes out the bits as w-by-h picture,
* with the 1 bits in black and the 0 bits in white.
*
* % more abra.txt
* ABRACADABRA!
*
* % java PictureDump 16 6 < abra.txt
*
******************************************************************************/
package edu.princeton.cs.algs4;
import java.awt.Color;
/**
* The {@code PictureDump} class provides a client for displaying the contents
* of a binary file as a black-and-white picture.
* <p>
* For additional documentation,
* see <a href="http://algs4.cs.princeton.edu/55compress">Section 5.5</a> of
* <i>Algorithms, 4th Edition</i> by Robert Sedgewick and Kevin Wayne.
* <p>
* See also {@link BinaryDump} and {@link HexDump}.
*
* @author Robert Sedgewick
* @author Kevin Wayne
*/
public class PictureDump {
// Do not instantiate.
private PictureDump() { }
/**
* Reads in a sequence of bytes from standard input and draws
* them to standard drawing output as a width-by-height picture,
* using black for 1 and white for 0 (and red for any leftover
* pixels).
*
* @param args the command-line arguments
*/
public static void main(String[] args) {
int width = Integer.parseInt(args[0]);
int height = Integer.parseInt(args[1]);
Picture picture = new Picture(width, height);
for (int row = 0; row < height; row++) {
for (int col = 0; col < width; col++) {
if (!BinaryStdIn.isEmpty()) {
boolean bit = BinaryStdIn.readBoolean();
if (bit) picture.set(col, row, Color.BLACK);
else picture.set(col, row, Color.WHITE);
}
else {
picture.set(col, row, Color.RED);
}
}
}
picture.show();
}
}
/******************************************************************************
* Copyright 2002-2016, Robert Sedgewick and Kevin Wayne.
*
* This file is part of algs4.jar, which accompanies the textbook
*
* Algorithms, 4th edition by Robert Sedgewick and Kevin Wayne,
* Addison-Wesley Professional, 2011, ISBN 0-321-57351-X.
* http://algs4.cs.princeton.edu
*
*
* algs4.jar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* algs4.jar is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with algs4.jar. If not, see http://www.gnu.org/licenses.
******************************************************************************/