英文:
Java: How to readd delimiter back to string after reversing split word?
问题
String fileContent = "def mnop.STU";String delimiter = "[^a-zA-Z0-9']+";String[] splitWords = fileContent.split(delimiter);StringBuilder stringBuilder = new StringBuilder();for (String word : splitWords) {StringBuilder output = new StringBuilder(word).reverse();stringBuilder.append(output);}StringJoiner joiner = new StringJoiner(delimiter);for (String reversedWord : splitWords) {joiner.add(new StringBuilder(reversedWord).reverse());}System.out.println(joiner.toString());
Current output: fedponmUTSDesired output: fed ponm.UTS
英文:
After I reverse the split words, I am unsure on how to re add the delimiters.
String fileContent = "def mnop.STU";String delimiter = "[^a-zA-Z0-9']+";String[] splitWords = fileContent.split(delimiter);StringBuilder stringBuilder = new StringBuilder();for (String word : splitWords) {StringBuilder output = new StringBuilder(word).reverse();stringBuilder.append(output);}StringJoiner joiner = new StringJoiner(delimiter);joiner.add(stringBuilder);System.out.println(joiner.toString());
Current output: fedponmUTS
Desired output: fed ponm.UTS
答案1
得分: 2
这不是非常优雅的代码，但你能否像这样做？
for (String word : splitWords){int idx = fileContent.indexOf(word, stringBuilder.length());String delim = fileContent.substring(stringBuilder.length(), idx);stringBuilder.append(delim);StringBuilder output = new StringBuilder(word).reverse();stringBuilder.append(output);}
输出：
fed ponm.UTS
英文:
It's not very elegant, but could you do something like this?
for (String word : splitWords){int idx = fileContent.indexOf(word, stringBuilder.length());String delim = fileContent.substring(stringBuilder.length(), idx);stringBuilder.append(delim);StringBuilder output = new StringBuilder(word).reverse();stringBuilder.append(output);}
Output:
fed ponm.UTS
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