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HexDump.javaAPI DocAndroid 1.5 API4639Wed May 06 22:41:56 BST 2009com.android.internal.util

HexDump

public class HexDump extends Object

Fields Summary
private static final char[]
HEX_DIGITS
Constructors Summary
Methods Summary
public static java.lang.StringdumpHexString(byte[] array)

    
        
    
        return dumpHexString(array, 0, array.length);
public static java.lang.StringdumpHexString(byte[] array, int offset, int length)

        StringBuilder result = new StringBuilder();
        
        byte[] line = new byte[16];
        int lineIndex = 0;
        
        result.append("\n0x");
        result.append(toHexString(offset));
        
        for (int i = offset ; i < offset + length ; i++)
        {
            if (lineIndex == 16)
            {
                result.append(" ");
                
                for (int j = 0 ; j < 16 ; j++)
                {
                    if (line[j] > ' " && line[j] < '~")
                    {
                        result.append(new String(line, j, 1));
                    }
                    else
                    {
                        result.append(".");
                    }
                }
                
                result.append("\n0x");
                result.append(toHexString(i));
                lineIndex = 0;
            }
            
            byte b = array[i];
            result.append(" ");
            result.append(HEX_DIGITS[(b >>> 4) & 0x0F]);
            result.append(HEX_DIGITS[b & 0x0F]);
            
            line[lineIndex++] = b;
        }
        
        if (lineIndex != 16)
        {
            int count = (16 - lineIndex) * 3;
            count++;
            for (int i = 0 ; i < count ; i++)
            {
                result.append(" ");
            }
            
            for (int i = 0 ; i < lineIndex ; i++)
            {
                if (line[i] > ' " && line[i] < '~")
                {
                    result.append(new String(line, i, 1));
                }
                else
                {
                    result.append(".");
                }
            }
        }
        
        return result.toString();
public static byte[]hexStringToByteArray(java.lang.String hexString)

        int length = hexString.length();
        byte[] buffer = new byte[length / 2];

        for (int i = 0 ; i < length ; i += 2)
        {
            buffer[i / 2] = (byte)((toByte(hexString.charAt(i)) << 4) | toByte(hexString.charAt(i+1)));
        }
        
        return buffer;
private static inttoByte(char c)

        if (c >= '0" && c <= '9") return (c - '0");
        if (c >= 'A" && c <= 'F") return (c - 'A" + 10);
        if (c >= 'a" && c <= 'f") return (c - 'a" + 10);

        throw new RuntimeException ("Invalid hex char '" + c + "'");
public static byte[]toByteArray(byte b)

        byte[] array = new byte[1];
        array[0] = b;
        return array;
public static byte[]toByteArray(int i)

        byte[] array = new byte[4];
        
        array[3] = (byte)(i & 0xFF);
        array[2] = (byte)((i >> 8) & 0xFF);
        array[1] = (byte)((i >> 16) & 0xFF);
        array[0] = (byte)((i >> 24) & 0xFF);
        
        return array;
public static java.lang.StringtoHexString(byte b)

        return toHexString(toByteArray(b));
public static java.lang.StringtoHexString(byte[] array)

        return toHexString(array, 0, array.length);
public static java.lang.StringtoHexString(byte[] array, int offset, int length)

        char[] buf = new char[length * 2];

        int bufIndex = 0;
        for (int i = offset ; i < offset + length; i++) 
        {
            byte b = array[i];
            buf[bufIndex++] = HEX_DIGITS[(b >>> 4) & 0x0F];
            buf[bufIndex++] = HEX_DIGITS[b & 0x0F];
        }

        return new String(buf);
public static java.lang.StringtoHexString(int i)

        return toHexString(toByteArray(i));