I want a regular expression pattern that will match with the end of a string.
I'm implementing a stemming algorithm that will remove suffixes of a word.
Eg for a word 'Developers' it should match 's'.
I can do it using following code :
Pattern p = Pattern.compile("s");
Matcher m = p.matcher("Developers");
m.replaceAll(" "); // it will replace all 's' with ' '
I want a regular expression that will match only a string's end something like replaceLast()
.
You need to match "s", but only if it is the last character in a word. This is achieved with the boundary assertion $:
input.replaceAll("s$", " ");
If you enhance the regular expression, you can replace multiple suffixes with one call to replaceAll:
input.replaceAll("(ed|s)$", " ");
使用$
:
Pattern p = Pattern.compile("s$");
public static void main(String[] args)
{
String message = "hi this message is a test message";
message = message.replaceAll("message$", "email");
System.out.println(message);
}
Check this, http://docs.oracle.com/javase/tutorial/essential/regex/bounds.html
看看下面的例子:
String ss = "Developers".replaceAll(".$", " ");
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