You need to use return value of replaceAll() method. replaceAll() does not replace the characters in the current string, it returns a new ... ... <看更多>

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This code of yours is not working, despite your assurances that it is. It replaces just the first occurrence of 'ins', and that should be obvious since you ... ... <看更多>

replace every character at odd index with "&" in a string - replace.java. ... <看更多>