Created
March 26, 2013 06:31
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simple hex dump in Java
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public static String hexdump(byte[] data) { | |
final int perRow = 16; | |
final String hexChars = "0123456789ABCDEF"; | |
StringBuilder dump = new StringBuilder(); | |
StringBuilder chars = null; | |
for (int i = 0; i < data.length; i++) { | |
int offset = i % perRow; | |
if (offset == 0) { | |
chars = new StringBuilder(); | |
dump.append(String.format("%04x", i)) | |
.append(" "); | |
} | |
int b = data[i] & 0xFF; | |
dump.append(hexChars.charAt(b >>> 4)) | |
.append(hexChars.charAt(b & 0xF)) | |
.append(' '); | |
chars.append((char) ((b >= ' ' && b <= '~') ? b : '.')); | |
if (i == data.length - 1 || offset == perRow - 1) { | |
for (int j = perRow - offset - 1; j > 0; j--) | |
dump.append("-- "); | |
dump.append(" ") | |
.append(chars) | |
.append('\n'); | |
} | |
} | |
return dump.toString(); | |
} |
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