What is regex for replacing &f afrer same

Question

I have string like this:

Hello &f are &f you &f here?

And I want to replace only last &f with "" (by last I mean third one, which is near "here". I tried something like this:

"Hello &f are &f you &f here?".replaceAll(".&f", "")

But it doesn't work, so could someone help me?

possible duplicate http://stackoverflow.com/questions/16665387/replace-last-occurrence-of-a-character-in-a-string — Vamshi, Jan 30 '14 at 18:09

Nir Alfasi · Answer 1 · 2014-01-30T18:08:54.180

1

    String s = "Hello &f are &f you &f here?";
    s = s.substring(0,s.lastIndexOf("&f")) + s.substring(s.lastIndexOf("&f")+3);
    System.out.println("s = " + s); // prints: s = Hello &f are &f you here?

edited Jan 30 '14 at 18:08

answered Jan 30 '14 at 18:03

Nir Alfasi

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score 1 · Answer 2 · answered Jan 30 '14 at 18:10

1

Use this:

(.*)&f

And replace with the backreference $1. (Or is it \1 in Java?)

http://regex101.com/r/qG0fM9

answered Jan 30 '14 at 18:10

brandonscript

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score 1 · Accepted Answer · answered Jan 30 '14 at 18:22

Can also be done with StringBuilder.reverse()

String str1 = "Hello &f are &f you &f here ?";
String temp = new StringBuilder(str1).reverse().toString().replaceFirst("f&", "");
String rslt = new StringBuilder(temp).reverse().toString();
System.out.println(rslt);

Steps:

Reverse the String using StringBuffer
Replace first f& with the help of String.replaceFirst()
Then again reverse that String.

Output:

Hello &f are &f you  here ?

What is regex for replacing &f afrer same

3 Answers3