如何分别替换同一句话中不同大小写的同一个词？

Question

例如，将 "HOW do I replace different how in the same sentence by using Matcher?" 替换为 "LOL do I replace different lol in the same sentence?"

如果 HOW 全部大写，请将其替换为 LOL。否则换成lol.

我只知道怎么找：

String source = "HOW do I replace different how in the same " +
                "sentence by using Matcher?"

Pattern pattern = Pattern.compile(how, Pattern.CASE_INSENSITIVE);
    Matcher m = pattern.matcher(source);
    while (m.find()) {
         if(m.group.match("^[A-Z]*$"))        
              System.out.println("I am uppercase");
         else
              System.out.println("I am lowercase");

    }

但我不知道如何使用匹配器和模式来替换它们。

Answer 1

这是实现您的目标的一种方法：（不一定是最有效的，但它有效并且易于理解）

String source = "HOW do I replace different how in the same sentence by using Matcher?";
    String[] split = source.replaceAll("HOW", "LOL").split(" ");
    String newSource = "";
    for(int i = 0; i < split.length; i++) {
        String at = split[i];
        if(at.equalsIgnoreCase("how"))  at = "lol";
        newSource+= " " + at;
    }
    newSource.substring(1, newSource.length());
//The output string is newSource

替换所有大写字母，然后遍历每个单词并将剩余的 "how" 替换为 "lol"。最后的子字符串只是删除多余的 space.

Answer 2

我想出了一个非常愚蠢的解决方案：

String result = source;
result = result.replaceAll(old_Word, new_Word);
result = result.replaceAll(old_Word.toUpperCase(), 
newWord.toUpperCase());

如何分别替换同一句话中不同大小写的同一个词？

How do I replace the same word but different case in the same sentence separately?

java

regex

matcher

pattern-matching