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如何处理倒排字符串上的标点符号和大写?

string arrays android java

esQmo_ · 技术社区 · 7 年前

我从EditText中获取用户输入,将其反转,然后在TextView中输出。除了输入的字符串输出外,一切正常,例如 StackOverflow is a community of awesome programmers! 变成 !programmers awesome of community a is StackOverflow .

当字符串倒转时,将第一个字母大写: Programmers awesome of community a is StackOverflow
programmers awesome of community a is StackOverflow !

我使用下面的代码来反转字符串:

        String[] nowTyping = input.getText().toString().split(" ");
        ArrayList<String> wordArray = new ArrayList<>();
        for (String word : nowTyping) {
            wordArray.add(0, word);
        }
        String invertedSentence = TextUtils.join(" ", wordArray);
        output.setText(invertedSentence);

我已经试过了 android:inputType="textCapWords" 把第一个字母大写,但似乎不起作用。谢谢你的时间。

2 回复 | 直到 7 年前

Tejas Trivedi 7 年前

试试这样的

String[] nowTyping = "It is broken!".split(" ");
            ArrayList<String> wordArray = new ArrayList<>();
            ArrayList<String> symbolsArray = new ArrayList<>();
            int cnt=0;
            for (int j=nowTyping.length-1 ;j >=0;j--) {
                String word = nowTyping[j];
                if (word.length()>0) {
                    word = word.toLowerCase();
                    char firstChar = word.charAt(0);
                    if (cnt == 0) {
                        boolean isFirstCharFounded = false;
                        for (int i = 0; i < word.length(); i++) {
                            if (!isFirstCharFounded&&Character.isAlphabetic(word.charAt(i))) {
                                firstChar = word.charAt(i);
                                isFirstCharFounded = true;
                            } else if (!(Character.isDigit(word.charAt(i))||Character.isAlphabetic(word.charAt(i)))) {
                                symbolsArray.add(word.charAt(i) + "");
                                word = word.replace(word.charAt(i)+"","");
                            }
                        }

                        firstChar = Character.toUpperCase(firstChar);
                        cnt++;
                    }
                    if (word.length()>=2) {
                        word = firstChar + word.substring(1);
                    }
                    else {
                        word = firstChar + "";
                    }

                    wordArray.add( word);
                }
            }
            String invertedSentence = TextUtils.join(" ", wordArray);
            invertedSentence += TextUtils.join("",symbolsArray);

xingbin 7 年前

可以使用StringBuilder:

    String invertedSentence = "!programmers awesome of community a is StackOverflow";
    StringBuilder stringBuilder = new StringBuilder(invertedSentence);

    if (!Character.isLetter(stringBuilder.charAt(0))) {
        char mark = stringBuilder.charAt(0);
        stringBuilder = stringBuilder.deleteCharAt(0);
        stringBuilder = stringBuilder.append(mark);
    }

    if (!Character.isUpperCase(stringBuilder.charAt(0))) {
        char mark = stringBuilder.charAt(0);
        stringBuilder = stringBuilder.deleteCharAt(0);
        stringBuilder = stringBuilder.insert(0, Character.toUpperCase(mark));
    }

    invertedSentence = stringBuilder.toString();