Random name generator

Main.java

import java.util.Random;


public class Main {
	
	public static void main(String[] args) {
		System.out.println(getRandomName(new Random(), 10));
	}
	
	
	//Returns vowels based on the most common letters and the frequency that they occur
	public static char getRandomVowel(Random rand) {
		int r = rand.nextInt(38100);
		if (r < 8167) return 'a';
		if (r < 20869) return 'e';
		if (r < 27835) return 'i';
		if (r < 35342) return 'o';
		return 'u';
	}
	
	public static char getRandomConsonant(Random rand) {
		int r = rand.nextInt(34550);
		r += rand.nextInt(34550);
		
		if (r < 1492) return 'b';
		if (r < 4274) return 'c';
		if (r < 8527) return 'd';
		if (r < 10755) return 'f';
		if (r < 12770) return 'g';
		if (r < 18864) return 'h';
		if (r < 19017) return 'j';
		if (r < 19789) return 'k';
		if (r < 23814) return 'l';
		if (r < 26220) return 'm';
		if (r < 32969) return 'n';
		if (r < 34898) return 'p';
		if (r < 34993) return 'q';
		if (r < 40980) return 'r';
		if (r < 47307) return 's';
		if (r < 56363) return 't';
		if (r < 57341) return 'v';
		if (r < 59701) return 'w';
		if (r < 59851) return 'x';
		if (r < 61825) return 'y';
		return 'z';
	}
	
	public static String generateRandomWord(Random rand, int maxLength) {
		StringBuilder builder = new StringBuilder();
		char nextLetter;
		int length = Math.max(4, rand.nextInt(maxLength));
		for (int i = 0; i < length; i++) {
			int r = rand.nextInt(1000);
			if (r < 381) {
				nextLetter = getRandomVowel(rand);
			} else {
				nextLetter = getRandomConsonant(rand);
			}
			if (i == 0) {
				nextLetter = Character.toUpperCase(nextLetter);
			}
			builder.append(nextLetter);
		}
		return builder.toString();
	}
	
	public static boolean isValidName(String name) {
		int consonantCount = 0;
		int vowelCount = 0;
		int vowelStreak = 0;
		int consonantStreak = 0;
		
		name = name.toLowerCase();
		for (int i = 0; i < name.length(); i++) {
			char ch = name.charAt(i);
			if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {
				vowelCount++;
				vowelStreak++;
				consonantStreak = 0;
			} else {
				consonantCount++;
				consonantStreak++;
				vowelStreak = 0;
			}
			if (consonantStreak > 3 || vowelStreak > 4) {
				return false;
			}
		}
		//More than 75% of the word is vowels
		if ((vowelCount * 100 / Math.max(1, vowelCount + consonantCount)) >= 75) {
			return false;
		}
		//More than 70% of the word is consonants
		if ((consonantCount * 100 / Math.max(1, vowelCount + consonantCount)) >= 70) {
			return false;
		}
		return true;
	}
	
	public static String getRandomName(Random rand, int maxLength) {
		String randomName = "";
		int tries = 3;
		maxLength = Math.max(4, maxLength);
		while(tries > 0) {
			String name = generateRandomWord(rand, maxLength);
			if (isValidName(name)) {
				//first word is always valid
				if (randomName.length() == 0) {
					randomName = name;
				} else {
					int newLength = randomName.length() + name.length();
					if (newLength <= maxLength) {
						randomName += " " + name;
					} else {
						tries--;
					}
				}
			}
		}
		return randomName;
	}
}