How to replace character in the string using regex in java?

Question

I want to replace every x in the end of line or string and behind every letters except aiueo with nya. Expected input and output:

Input: bapakx

Output: bapaknya

I've tried this one:

String myString = "bapakx";
String regex = "[^aiueo]x(\\s|$)";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(myString);
if(m.find()){
    myString = m.replaceAll("nya");
}

But the output is not bapaknya but bapanya. The k character is also replaced. How can I solve this?

anubhava · Accepted Answer · 2019-10-21 15:50:07Z

3

To get consonant back Use a zero width lookbehind in your regex as:

String regex = "(?<=[^aiueo])x(?=\\s|$)";

Here (?<=[^aiueo]) will only assert presence of consonant before x but won't match it.

Alternatively you can use capture groups:

String regex = "([^aiueo])x(\\s|$)";

and use it as:

myString = m.replaceAll("$1nya");

answered Oct 21, 2019 at 15:50

anubhava

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1 Comment

Ruddy Cahyanto Over a year ago

Ahh, got it. Thank you

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