如何检查Java字符串中的每个值？

Question

If I had a string, say:

String name;

Is there a way I can check each letter with a loop? So if they enter a name can I check what each letter is?

Answer 1

There are several ways to do it - you can do a for loop with an index, or a foreach loop on the char[] array:

for (int i = 0 ; i != s.length() ; i++) {
    char c = s.charAt(i);
    ....
}

for (char c : s.toCharArray()) {
    ....
}

In addition to checking each letter separately, you can check all letters at once (or any subset that you'd like) with regular expressions .

Answer 2

使用String.toCharArray()函数。

Answer 3

char[] chars = name.toCharArray();
for (int i =0; i < chars.length; i++)
{
    System.out.println(chars[i]);
}

Answer 4

This should do

for ( int i=0 ; i < name.length(); i++)
{
   name.charAt(i);
}

Also read this http://docs.oracle.com/javase/tutorial/java/data/manipstrings.html