Java中 获取指定字符串在另一个字符串中出现的次数

public int count(String srcText, String findText) {
String[] array = srcText.split(findText);
return array.length - 1;
}

public static int count(String srcText, String findText) {
int count = 0;
Pattern p = Pattern.compile(findText);
Matcher m = p.matcher(srcText);
while (m.find()) {
count++;
}
return count;
}

public static int count(String srcText, String findText) {
int count = 0;
int index = 0;
while ((index = srcText.indexOf(findText, index)) != -1) {
index = index + findText.length();
count++;
}
return count;
}