Question

我正在尝试将文本文档转换为速记，而不使用java中的任何replace（）方法。我转换的其中一个字符串是“the”到“＆amp;”。问题是，我不知道包含“the”字符串的每个单词的子字符串。那么如何在不使用replace（）方法的情况下替换字符串的那一部分？

例如：“他们的”将成为“＆amp; ir”，“在一起”将成为“toge＆amp; r”

这就是我的开始，

String the = "the";
Scanner wordScanner = new Scanner(word);
    if (wordScanner.contains(the)) {
        the = "&";
    }

我只是不确定如何进行替换。

Answer 1

你可以试试这个：

String word = "your string with the";
word = StringUtils.join(word.split("the"),"&");
Scanner wordScanner = new Scanner(word);

Answer 2

我没有为此使用Scanner，但您可以将每个字符读入缓冲区（StringBuilder），直到您阅读＆＃34;＆＃34;进入缓冲区。完成后，您可以删除该单词，然后附加要替换的单词。

public static void main(String[] args) throws Exception {
    String data = "their together the them forever";
    String wordToReplace = "the";
    String wordToReplaceWith = "&";

    Scanner wordScanner = new Scanner(data);
    // Using this delimiter to get one character at a time from the scanner
    wordScanner.useDelimiter("");

    StringBuilder buffer = new StringBuilder();
    while (wordScanner.hasNext()) {
        buffer.append(wordScanner.next());

        // Check if the word you want to replace is in the buffer
        int wordToReplaceIndex = buffer.indexOf(wordToReplace);
        if (wordToReplaceIndex > -1) {
            // Delete the word you don't want in the buffer
            buffer.delete(wordToReplaceIndex, wordToReplaceIndex + wordToReplace.length());
            // Append the word to replace the deleted word with
            buffer.append(wordToReplaceWith);
        } 
    }

    // Output results
    System.out.println(buffer);
}

结果：

&ir toge&r & &m forever

这可以在没有使用while循环和StringBuilder

的扫描程序的情况下完成

public static void main(String[] args) throws Exception {
    String data = "their together the them forever";
    StringBuilder buffer = new StringBuilder(data);

    String wordToReplace = "the";
    String wordToReplaceWith = "&";

    int wordToReplaceIndex = -1;
    while ((wordToReplaceIndex = buffer.indexOf(wordToReplace)) > -1) {
        buffer.delete(wordToReplaceIndex, wordToReplaceIndex + wordToReplace.length());
        buffer.insert(wordToReplaceIndex, wordToReplaceWith);
    }

    System.out.println(buffer);
}

结果：

&ir toge&r & &m forever

Answer 3

您可以使用Pattern和Matcher Regex：

Pattern pattern = Pattern.compile("the ");
        Matcher matcher = pattern.matcher("the cat and their owners");
        StringBuffer sb = new StringBuffer();
        while(matcher.find()){
            matcher.appendReplacement(sb, "& ");
        }
        matcher.appendTail(sb);
        System.out.println(sb.toString());

如何在不使用replace（）方法

3 个答案: