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Editorial Team
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Asked: 2026-05-14T20:30:50+00:00

I need to do a simple string replace operation on a segment of string.

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I need to do a simple string replace operation on a segment of string. I ran into the following issue and hope to get some advice.

  1. In the original string I got, I can replace the string such as <div class="more"> to something else.
  2. BUT, in the same original string, if I want to replace a much long string such as the following, it won’t work. Nothing gets replaced after the call.

<div class="more"><a href="http://SERVER_name/profiles/atom/mv/theboard/entries/related.do?email=xyz.com&amp;ps=20&amp;since=1273518953218&amp;sinceEntryId=abc-def-123-456">More...</a></div>

I tried these two methods:

originalString.replaceFirst(moreTag, newContent);
originalString.replaceAll(moreTag, newContent);

Thanks in advance.

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1 Answer

  1. Editorial Team

    You need to get hold of the result of the replacement and use it further:

    String newString = originalString.replaceFirst(moreTag, newContent);
System.out.println(newString);

    Explanation: strings in Java are immutable. The behavioral methods of java.lang.String won’t change the internal value. They instead will return the modified result.

    If that still doesn’t return the desired result, then the moreTag simply didn’t match anything. The methods you mentioned expects a regular expression. You can find in the Pattern javadoc how to compose a valid regex pattern.

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