什么是检查所有的字母给定的字符串中最好的逻辑。

What would be the best logic to check all the letters in a given string.

如果所有26个字母都在提供的字符串可用，我要检查并执行这样欢声笑语。例如。我的包箱五打酒水罐。

If all the 26 letters are available in the provided string, I want to check that and perform so ops. eg. Pack my box with five dozen liquor jugs.

顺便说一句我的code将在Java中。

BTW my code would be in Java.

推荐答案

尚未完全优化的：

public static void main(String... a) {
    String s = "Pack my box with five dozen liquor jugs.";
    int i=0;
    for(char c : s.toCharArray()) {
        int x = Character.toUpperCase(c);
        if (x >= 'A' && x <= 'Z') {
            i |= 1 << (x - 'A');
        }
    }
    if (i == (i | ((1 << (1 + 'Z' - 'A')) - 1))) {
        System.out.println("ok");
    }
}