RosettaCodeData/Task/Mayan-numerals/Java/mayan-numerals.java

import java.math.BigInteger;

public class MayanNumerals {

    public static void main(String[] args) {
        for ( long base10 : new long[] {4005, 8017, 326205, 886205, 1000000000, 1081439556L, 26960840421L, 503491211079L }) {
            displayMyan(BigInteger.valueOf(base10));
            System.out.printf("%n");
        }
    }

    private static char[] digits = "0123456789ABCDEFGHJK".toCharArray();
    private static BigInteger TWENTY = BigInteger.valueOf(20);

    private static void displayMyan(BigInteger numBase10) {
        System.out.printf("As base 10:  %s%n", numBase10);
        String numBase20 = "";
        while ( numBase10.compareTo(BigInteger.ZERO) > 0 ) {
            numBase20 = digits[numBase10.mod(TWENTY).intValue()] + numBase20;
            numBase10 = numBase10.divide(TWENTY);
        }
        System.out.printf("As base 20:  %s%nAs Mayan:%n", numBase20);
        displayMyanLine1(numBase20);
        displayMyanLine2(numBase20);
        displayMyanLine3(numBase20);
        displayMyanLine4(numBase20);
        displayMyanLine5(numBase20);
        displayMyanLine6(numBase20);
    }

    private static char boxUL = Character.toChars(9556)[0];
    private static char boxTeeUp = Character.toChars(9574)[0];
    private static char boxUR = Character.toChars(9559)[0];
    private static char boxHorz = Character.toChars(9552)[0];
    private static char boxVert = Character.toChars(9553)[0];
    private static char theta = Character.toChars(952)[0];
    private static char boxLL = Character.toChars(9562)[0];
    private static char boxLR = Character.toChars(9565)[0];
    private static char boxTeeLow = Character.toChars(9577)[0];
    private static char bullet = Character.toChars(8729)[0];
    private static char dash = Character.toChars(9472)[0];

    private static void displayMyanLine1(String base20) {
        char[] chars = base20.toCharArray();
        StringBuilder sb = new StringBuilder();
        for ( int i = 0 ; i < chars.length ; i++ ) {
            if ( i == 0 ) {
                sb.append(boxUL);
            }
            for ( int j = 0 ; j < 4 ; j++ ) {
                sb.append(boxHorz);
            }
            sb.append(i < chars.length-1 ? boxTeeUp : boxUR);
        }
        System.out.println(sb.toString());
    }

    private static String getBullet(int count) {
        StringBuilder sb = new StringBuilder();
        switch ( count ) {
        case 1:  sb.append(" " + bullet + "  "); break;
        case 2:  sb.append(" " + bullet + bullet + " "); break;
        case 3:  sb.append("" + bullet + bullet + bullet + " "); break;
        case 4:  sb.append("" + bullet + bullet + bullet + bullet); break;
        default:  throw new IllegalArgumentException("Must be 1-4:  " + count);
        }
        return sb.toString();
    }

    private static void displayMyanLine2(String base20) {
        char[] chars = base20.toCharArray();
        StringBuilder sb = new StringBuilder();
        for ( int i = 0 ; i < chars.length ; i++ ) {
            if ( i == 0 ) {
                sb.append(boxVert);
            }
            switch ( chars[i] ) {
            case 'G':  sb.append(getBullet(1)); break;
            case 'H':  sb.append(getBullet(2)); break;
            case 'J':  sb.append(getBullet(3)); break;
            case 'K':  sb.append(getBullet(4)); break;
            default :  sb.append("    ");
            }
            sb.append(boxVert);
        }
        System.out.println(sb.toString());
    }

    private static String DASH = getDash();

    private static String getDash() {
        StringBuilder sb = new StringBuilder();
        for ( int i = 0 ; i < 4 ; i++ ) {
            sb.append(dash);
        }
        return sb.toString();
    }

    private static void displayMyanLine3(String base20) {
        char[] chars = base20.toCharArray();
        StringBuilder sb = new StringBuilder();
        for ( int i = 0 ; i < chars.length ; i++ ) {
            if ( i == 0 ) {
                sb.append(boxVert);
            }
            switch ( chars[i] ) {
            case 'B':  sb.append(getBullet(1)); break;
            case 'C':  sb.append(getBullet(2)); break;
            case 'D':  sb.append(getBullet(3)); break;
            case 'E':  sb.append(getBullet(4)); break;
            case 'F': case 'G': case 'H': case 'J': case 'K':
                sb.append(DASH); break;
            default :  sb.append("    ");
            }
            sb.append(boxVert);
        }
        System.out.println(sb.toString());
    }

    private static void displayMyanLine4(String base20) {
        char[] chars = base20.toCharArray();
        StringBuilder sb = new StringBuilder();
        for ( int i = 0 ; i < chars.length ; i++ ) {
            if ( i == 0 ) {
                sb.append(boxVert);
            }
            switch ( chars[i] ) {
            case '6':  sb.append(getBullet(1)); break;
            case '7':  sb.append(getBullet(2)); break;
            case '8':  sb.append(getBullet(3)); break;
            case '9':  sb.append(getBullet(4)); break;
            case 'A': case 'B': case 'C': case 'D': case 'E':
            case 'F': case 'G': case 'H': case 'J': case 'K':
                sb.append(DASH); break;
            default :  sb.append("    ");
            }
            sb.append(boxVert);
        }
        System.out.println(sb.toString());
    }

    private static void displayMyanLine5(String base20) {
        char[] chars = base20.toCharArray();
        StringBuilder sb = new StringBuilder();
        for ( int i = 0 ; i < chars.length ; i++ ) {
            if ( i == 0 ) {
                sb.append(boxVert);
            }
            switch ( chars[i] ) {
            case '0':  sb.append(" " + theta + "  "); break;
            case '1':  sb.append(getBullet(1)); break;
            case '2':  sb.append(getBullet(2)); break;
            case '3':  sb.append(getBullet(3)); break;
            case '4':  sb.append(getBullet(4)); break;
            case '5': case '6': case '7': case '8': case '9':
            case 'A': case 'B': case 'C': case 'D': case 'E':
            case 'F': case 'G': case 'H': case 'J': case 'K':
                sb.append(DASH); break;
            default :  sb.append("    ");
            }
            sb.append(boxVert);
        }
        System.out.println(sb.toString());
    }

    private static void displayMyanLine6(String base20) {
        char[] chars = base20.toCharArray();
        StringBuilder sb = new StringBuilder();
        for ( int i = 0 ; i < chars.length ; i++ ) {
            if ( i == 0 ) {
                sb.append(boxLL);
            }
            for ( int j = 0 ; j < 4 ; j++ ) {
                sb.append(boxHorz);
            }
            sb.append(i < chars.length-1 ? boxTeeLow : boxLR);
        }
        System.out.println(sb.toString());
    }

}