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1
32
33 package com.jeantessier.classreader;
34
35 public class BitFormat {
36 public static final int DEFAULT_MAX_LENGTH = 32;
37 public static final int DEFAULT_GROUP_SIZE = 8;
38 public static final char DEFAULT_GROUP_SEPARATOR = ' ';
39
40 private int maxLength;
41 private int groupSize;
42 private char groupSeparator;
43
44 public BitFormat() {
45 this(DEFAULT_MAX_LENGTH, DEFAULT_GROUP_SIZE, DEFAULT_GROUP_SEPARATOR);
46 }
47
48 public BitFormat(int maxLength) {
49 this(maxLength, DEFAULT_GROUP_SIZE, DEFAULT_GROUP_SEPARATOR);
50 }
51
52 public BitFormat(int maxLength, int groupSize) {
53 this(maxLength, groupSize, DEFAULT_GROUP_SEPARATOR);
54 }
55
56 public BitFormat(int maxLength, int groupSize, char groupSeparator) {
57 this.maxLength = maxLength;
58 this.groupSize = groupSize;
59 this.groupSeparator = groupSeparator;
60 }
61
62 public String  format(int n) {
63 return format(Integer.toBinaryString(n).toCharArray());
64 }
65
66 public String format(long n) {
67 return format(Long.toBinaryString(n).toCharArray());
68 }
69
70 private String format(char[] binaryString) {
71 StringBuffer result = new StringBuffer ();
72
73 for (int i=0; i<maxLength; i++) {
74 if (((maxLength - i) % groupSize == 0) && i > 0) {
75 result.append(groupSeparator);
76 }
77
78 if (i < maxLength - binaryString.length) {
79 result.append('0');
80 } else {
81 result.append(binaryString[binaryString.length - maxLength + i]);
82 }
83 }
84
85 return result.toString();
86 }
87 }
88 |
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