45 lines
1.4 KiB
Java
45 lines
1.4 KiB
Java
// strings/Hex.java
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// (c)2020 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// {java onjava.Hex}
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package onjava;
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import java.io.*;
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import java.nio.file.*;
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public class Hex {
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public static String format(byte[] data) {
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StringBuilder result = new StringBuilder();
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int n = 0;
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for(byte b : data) {
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if(n % 16 == 0)
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result.append(String.format("%05X: ", n));
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result.append(String.format("%02X ", b));
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n++;
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if(n % 16 == 0) result.append("\n");
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}
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result.append("\n");
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return result.toString();
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}
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public static void
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main(String[] args) throws Exception {
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if(args.length == 0)
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// Test by displaying this class file:
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System.out.println(format(
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Files.readAllBytes(Paths.get(
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"build/classes/java/main/onjava/Hex.class"))));
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else
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System.out.println(format(
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Files.readAllBytes(Paths.get(args[0]))));
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}
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}
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/* Output: (First 6 Lines)
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00000: CA FE BA BE 00 00 00 34 00 61 0A 00 05 00 31 07
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00010: 00 32 0A 00 02 00 31 08 00 33 07 00 34 0A 00 35
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00020: 00 36 0A 00 0F 00 37 0A 00 02 00 38 08 00 39 0A
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00030: 00 3A 00 3B 08 00 3C 0A 00 02 00 3D 09 00 3E 00
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00040: 3F 08 00 40 07 00 41 0A 00 42 00 43 0A 00 44 00
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00050: 45 0A 00 14 00 46 0A 00 47 00 48 07 00 49 01 00
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...
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*/
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