更新时间:2022-04-03 05:49:27
对于简单的字符串检查,单个扫描字符串是足够。由于Regex不会提供任何显着的好处,这里有一个简单的for循环来实现相同的目的:
For a simple string check, a single sweep through the string is enough. Since Regex will not offer any significant benefit, here is a simple for loop to achieve the same :
private static boolean checkString(String str) {
char ch;
boolean capitalFlag = false;
boolean lowerCaseFlag = false;
boolean numberFlag = false;
for(int i=0;i < str.length();i++) {
ch = str.charAt(i);
if( Character.isDigit(ch)) {
numberFlag = true;
}
else if (Character.isUpperCase(ch)) {
capitalFlag = true;
} else if (Character.isLowerCase(ch)) {
lowerCaseFlag = true;
}
if(numberFlag && capitalFlag && lowerCaseFlag)
return true;
}
return false;
}
试运行
System.out.println(checkString("aBCd1")); // output is true
System.out.println(checkString("abcd")); //output is false
我认为这应该有助于OP的特殊问题。
I think this should help OP's particular problem.