在 Java 中，删除字符串的第一个字符，如果它是 ,（逗号）

Question

In Java, I have a String variable.

Sometimes the first character of the string is a comma ,

I want to remove the first char only if it is a comma.

What is the best approach to do this?

Answer 1

Something like:

text = text.startsWith(",") ? text.substring(1) : text;

is pretty simple...

Answer 2

我会将^锚与replaceFirst()一起使用：

niceString = yourString.replaceFirst("^,", "");

Answer 3

如果您的类路径中有 commons-lang，可以查看StringUtils.removeStart(String str, String remove)

Answer 4

Try this

public String methodNoCharacter(String input, String character){

if(input!= null && input.trim().length() > 0)//exist
            if(input.startsWith(character))//if start with '_'
                return methodNoCharacter(input.substring(1));//recursive for sure!

        return input;

}