BinTools 十六进制转换

package de.rtner.misc;

public class BinTools {
    public static final String hex = "0123456789ABCDEF";

    public BinTools() {
        super();
    }

    public static String bin2hex(byte[] arg5) {
        String v0;
        if(arg5 == null) {
            v0 = "";
        }
        else {
            StringBuffer v1 = new StringBuffer(arg5.length * );
            int v0_1;
            for(v0_1 = ; v0_1 < arg5.length; ++v0_1) {
                int v2 = (arg5[v0_1] + ) % ;
                v1.append("0123456789ABCDEF".charAt(v2 /  & ));
                v1.append("0123456789ABCDEF".charAt(v2 %  & ));
            }

            v0 = v1.toString();
        }

        return v0;
    }

    public static int hex2bin(char arg3) {
        int v0;
        if(arg3 <  || arg3 > ) {
            if(arg3 >=  && arg3 <= ) {
                return arg3 - ;
            }

            if(arg3 >=  && arg3 <= ) {
                return arg3 - ;
            }

            goto label_20;
        }
        else {
            v0 = arg3 - ;
        }

        return v0;
    label_20:
        throw new IllegalArgumentException(new StringBuffer().append("Input string may only contain hex digits, but found \'")
                .append(arg3).append("\'").toString());
    }

    public static byte[] hex2bin(String arg5) {
        int v0 = ;
        if(arg5 == null) {
            arg5 = "";
        }
        else if(arg5.length() %  != ) {
            arg5 = new StringBuffer().append("").append(arg5).toString();
        }

        byte[] v2 = new byte[arg5.length() / ];
        int v1 = ;
        while(v1 < arg5.length()) {
            int v3 = v1 + ;
            char v4 = arg5.charAt(v1);
            v1 = v3 + ;
            v2[v0] = ((byte)(BinTools.hex2bin(arg5.charAt(v3)) + BinTools.hex2bin(v4) * ));
            ++v0;
        }

        return v2;
    }

    public static void main(String[] arg5) {
        int v4 = ;
        int v0 = ;
        byte[] v3 = new byte[v4];
        byte v1;
        for(v1 = ; v0 < v4; v1 = ((byte)(v1 + ))) {
            v3[v0] = v1;
            ++v0;
        }

        String v0_1 = BinTools.bin2hex(v3);
        if(!v0_1.equals(BinTools.bin2hex(BinTools.hex2bin(v0_1)))) {
            throw new AssertionError("Mismatch");
        }
    }
}