contains quotation mark java

问题

how to I add an argument to check if a string contains ONE quotation mark ? I tried to escape the character but it doesn't work

words[i].contains()

EDIT: my bad, got some unclosed brackets, works fine now

回答1:

words[i].matches("[^\"]*\"[^\"]*")

That is: any non-quotes, a quote, any non-quotes.

回答2:

You could use something like this:

words[i].split("\"").length - 1

That would give you the amount of "s in your string. Therefore, just use:

if (words[i].split("\"").length == 2) {
    //do stuff
}

回答3:

You can check if the first quotation mark exists, and then check if the second one doesn't. It's much faster than using matches or split.

int index = words[i].indexOf('\"');
if (index != -1 && words[i].indexOf('\"', index + 1) == -1){
    // do stuff
}

回答4:

To check number or quotes you can also use length of string after removing ".

int quotesNumber = words[i].length() - words[i].replace("\"", "").length();
if (quotesNumber == 1){
    //do stuff
}

来源：https://stackoverflow.com/questions/16037903/contains-quotation-mark-java