String lowercase = "qwertyuiopasdfghjklzxcvbnm";
String uppercase = letters.toUpperCase();
String numbers = "1234567890";

String testString = "PassWord123";

int numbersMatch = 0;
int uppercaseMatch = 0;
int lowercaseMatch = 0;

for (int i = 0; i <= testString.length(); i++) {
	if (lowercase.indexOf(testString[i]) > -1) {
		lowercaseMatch++;
	}

	if (uppercase.indexOf(testString[i]) > -1) {
		uppercaseMatch++;
	}

	if (numbers.indexOf(testString[i]) > -1) {
		numbersMatch++;
	}
}