检查字符串是否是标点字符 [英] Check if string is a punctuation character

问题描述

假设我有一个包含一些字母和标点符号的字符串数组

Let's say I have a String array that contains some letters and punctuation

String letter[] = {"a","b","c",".","a"};

在信函[3]中我们有。

In letter[3] we have "."

如何检查字符串是否为标点字符？
我们知道有很多可能的标点字符（，。？！等）

How can I check if a string is a punctuation character? We know that there are many possible punctuation characters (,.?! etc.)

到目前为止我的进展：

for (int a = 0; a < letter.length; a++) {
    if (letter[a].equals(".")) { //===>> i'm confused in this line
        System.out.println ("it's punctuation");
    } else {
        System.out.println ("just letter");
    }
}

推荐答案

你想检查除以外的更多标点符号。？

如果是这样，你可以这样做。

If so you can do this.

String punctuations = ".,:;";//add all the punctuation marks you want.
...
if(punctuations.contains(letter[a]))

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