TextRenderHelper.java

package com.gmail.mooman219.api.text;

import gnu.trove.map.hash.TCharIntHashMap;
import java.util.List;
import org.bukkit.ChatColor;

public class TextRenderHelper {

    private static final TCharIntHashMap charWidths = new TCharIntHashMap(120, 0.5f, '0', -1);

    public static void assureRenderedWidth(List<String> strings, char filler) {
        assureRenderedWidth(strings, filler, ChatColor.RESET.toString());
    }

    public static void assureRenderedWidth(List<String> strings, char filler, String append) {
        int[] widths = new int[strings.size()];
        int max = 0;
        for (int i = 0; i < strings.size(); i++) {
            if (strings.get(i) != null) {
                widths[i] = getRenderedWidth(strings.get(i));
                max = Math.max(max, widths[i]);
            }
        }
        for (int i = 0; i < strings.size(); i++) {
            if (strings.get(i) != null) {
                strings.set(i, strings.get(i).concat(generateDesiredWidth(filler, max - widths[i])).concat(append));
            }
        }
    }

    public static int getMaxRenderedWidth(List<String> strings) {
        int max = 0;
        for (String string : strings) {
            if (string != null) {
                max = Math.max(max, getRenderedWidth(string));
            }
        }
        return max;
    }

    public static int getRenderedWidth(String string) {
        int length = 0;
        int characterWidth = 0;
        boolean bold = false;
        for (int i = 0; i < string.length(); i++) {
            if (string.charAt(i) == '§') {
                if (++i < string.length()) {
                    bold = (Character.toLowerCase(string.charAt(i)) == 'l') ? true : !doesResetBold(string.charAt(i));
                }
            } else {
                characterWidth = charWidths.get(string.charAt(i));
                length += (characterWidth == -1 ? 5 : characterWidth);
                length += (bold ? 1 : 0);
            }
        }
        return length;
    }

    public static String generateDesiredWidth(char character, int desiredWidth) {
        int characterWidth = charWidths.get(character);
        StringBuilder builder = new StringBuilder((desiredWidth / characterWidth) + 2);
        builder.append(ChatColor.RESET);
        for (int i = 0; i < desiredWidth; i += characterWidth) {
            builder.append(character);
        }
        return builder.toString();
    }

    private static boolean doesResetBold(char character) {
        switch (Character.toLowerCase(character)) {
            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
            case 'a':
            case 'b':
            case 'c':
            case 'd':
            case 'e':
            case 'f':
            case 'r':
                return true;
            default:
                return false;
        }
    }

    static {
        charWidths.put('A', 6);
        charWidths.put('B', 6);
        charWidths.put('C', 6);
        charWidths.put('D', 6);
        charWidths.put('E', 6);
        charWidths.put('F', 6);
        charWidths.put('G', 6);
        charWidths.put('H', 6);
        charWidths.put('I', 4);
        charWidths.put('J', 6);
        charWidths.put('K', 6);
        charWidths.put('L', 6);
        charWidths.put('M', 6);
        charWidths.put('N', 6);
        charWidths.put('O', 6);
        charWidths.put('P', 6);
        charWidths.put('Q', 6);
        charWidths.put('R', 6);
        charWidths.put('S', 6);
        charWidths.put('T', 6);
        charWidths.put('U', 6);
        charWidths.put('V', 6);
        charWidths.put('W', 6);
        charWidths.put('X', 6);
        charWidths.put('Y', 6);
        charWidths.put('Z', 6);

        charWidths.put('a', 6);
        charWidths.put('b', 6);
        charWidths.put('c', 6);
        charWidths.put('d', 6);
        charWidths.put('e', 6);
        charWidths.put('f', 5);
        charWidths.put('g', 6);
        charWidths.put('h', 6);
        charWidths.put('i', 2);
        charWidths.put('j', 6);
        charWidths.put('k', 5);
        charWidths.put('l', 3);
        charWidths.put('m', 6);
        charWidths.put('n', 6);
        charWidths.put('o', 6);
        charWidths.put('p', 6);
        charWidths.put('q', 6);
        charWidths.put('r', 6);
        charWidths.put('s', 6);
        charWidths.put('t', 4);
        charWidths.put('u', 6);
        charWidths.put('v', 6);
        charWidths.put('w', 6);
        charWidths.put('x', 6);
        charWidths.put('y', 6);
        charWidths.put('z', 6);

        charWidths.put('0', 6);
        charWidths.put('1', 6);
        charWidths.put('2', 6);
        charWidths.put('3', 6);
        charWidths.put('4', 6);
        charWidths.put('5', 6);
        charWidths.put('6', 6);
        charWidths.put('7', 6);
        charWidths.put('8', 6);
        charWidths.put('9', 6);

        charWidths.put(' ', 4);
        charWidths.put('~', 7);
        charWidths.put('!', 2);
        charWidths.put('@', 7);
        charWidths.put('#', 6);
        charWidths.put('$', 6);
        charWidths.put('%', 6);
        charWidths.put('^', 6);
        charWidths.put('&', 6);
        charWidths.put('*', 5);
        charWidths.put('(', 5);
        charWidths.put(')', 5);
        charWidths.put('_', 6);
        charWidths.put('+', 6);
        charWidths.put('`', 3);
        charWidths.put('-', 6);
        charWidths.put('=', 6);

        charWidths.put('{', 5);
        charWidths.put('}', 5);
        charWidths.put('|', 2);
        charWidths.put(':', 2);
        charWidths.put('\"', 5);
        charWidths.put('<', 5);
        charWidths.put('>', 5);
        charWidths.put('?', 6);

        charWidths.put('[', 4);
        charWidths.put(']', 4);
        charWidths.put('\\', 6);
        charWidths.put(';', 2);
        charWidths.put('\'', 3);
        charWidths.put(',', 2);
        charWidths.put('.', 2);
        charWidths.put('/', 6);

        charWidths.put('»', 6);
    }
}

Usage.java

            List<String> lines = new ArrayList<>();
            lines.add(ChatColor.GREEN + "" + ChatColor.BOLD + "Quest Complete!");
            lines.add(null); // Null will just skip the line.
            lines.add("Gold: " + ChatColor.GOLD + "" + ChatColor.BOLD + "32");
            lines.add("Exp: " + ChatColor.DARK_PURPLE + "" + ChatColor.BOLD + "194");
            TextRenderHelper.assureRenderedWidth(lines, ' ');
            HologramManager.get().spawnHologram(lines, player.getEyeLocation(), player, 200);