Base58Check encoding: Difference between revisions
Added Java
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EJDM8drfXA6uyA
Rt5zm</pre>
=={{header|Java}}==
{{trans|Kotlin}}
{{works with|Java|9}}
<lang Java>import java.math.BigInteger;
import java.util.List;
public class Base58CheckEncoding {
private static final String ALPHABET = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
private static final BigInteger BIG0 = BigInteger.ZERO;
private static final BigInteger BIG58 = BigInteger.valueOf(58);
private static String convertToBase58(String hash) {
return convertToBase58(hash, 16);
}
private static String convertToBase58(String hash, int base) {
BigInteger x;
if (base == 16 && hash.substring(0, 2).equals("0x")) {
x = new BigInteger(hash.substring(2), 16);
} else {
x = new BigInteger(hash, base);
}
StringBuilder sb = new StringBuilder();
while (x.compareTo(BIG0) > 0) {
int r = x.mod(BIG58).intValue();
sb.append(ALPHABET.charAt(r));
x = x.divide(BIG58);
}
return sb.reverse().toString();
}
public static void main(String[] args) {
String s = "25420294593250030202636073700053352635053786165627414518";
String b = convertToBase58(s, 10);
System.out.printf("%s -> %s\n", s, b);
List<String> hashes = List.of(
"0x61",
"0x626262",
"0x636363",
"0x73696d706c792061206c6f6e6720737472696e67",
"0x516b6fcd0f",
"0xbf4f89001e670274dd",
"0x572e4794",
"0xecac89cad93923c02321",
"0x10c8511e"
);
for (String hash : hashes) {
String b58 = convertToBase58(hash);
System.out.printf("%-56s -> %s\n", hash, b58);
}
}
}</lang>
{{out}}
<pre>25420294593250030202636073700053352635053786165627414518 -> 6UwLL9Risc3QfPqBUvKofHmBQ7wMtjvM
0x61 -> 2g
0x626262 -> a3gV
0x636363 -> aPEr
0x73696d706c792061206c6f6e6720737472696e67 -> 2cFupjhnEsSn59qHXstmK2ffpLv2
0x516b6fcd0f -> ABnLTmg
0xbf4f89001e670274dd -> 3SEo3LWLoPntC
0x572e4794 -> 3EFU7m
0xecac89cad93923c02321 -> EJDM8drfXA6uyA
0x10c8511e -> Rt5zm</pre>
=={{header|Julia}}==
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