Replacing a variable with a value in Java

Question

I have a string that has certain variables like "This is string containing $variable$". I want to replace this $variable$ with a new string. If I use replaceall method like str.replaceall("$variable$","new_value") it is not getting replaced. But if I give without $ symbols, it is replacing. But my output is like this, $new_value$ . I need it without the $ symbol.

Audrius Meškauskas · Accepted Answer · 2013-01-07 12:30:15Z

2

String.replaceAll() takes a regular expression as a parameter, and $ has a special meaning there. Just escape dollar signs with \:

myString.replaceAll("\\$variable\\$", replacement);

answered Jan 7, 2013 at 12:30

Audrius Meškauskas

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Audrius Meškauskas · Accepted Answer · 2013-01-07 12:45:19Z

2

Try to use String.replace(CharSequence, CharSequence):

str.replace("$variable$","new_value");

because String.replaceAll() expects a regular expression as the first parameter, and the $ character on regular expression stands for "match at the end of the string"

edited Jan 7, 2013 at 12:45

Audrius Meškauskas

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answered Jan 7, 2013 at 12:30

Manuel Miranda

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3 Comments

Audrius Meškauskas Over a year ago

This will not compile as String.replace takes a char only and not a string.

Manuel Miranda Over a year ago

Are you sure? public String replace(CharSequence target, CharSequence replacement). please, check the API before downvoting.

Audrius Meškauskas Over a year ago

Some of these new methods that older generation does not recall and never use. Consider linking. Upvoting.

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