I have code that does't like dollar sign that must be vissible in replacement.
String s1= "this is amount <AMOUNT> you must pay";
s1.replaceAll("<AMOUNT>", "$2.60");
System.out.print(s1);
I have exception java.lang.IllegalArgumentException: Illegal group reference
I expet to get string "this is amount $2.60 you must pay"
How to change my code to have required result?
If you don't need to use regular expressions (you don't seem to), use replace instead:
s1 = s1.replace("<AMOUNT>", "$2.60");
replaceAll and escape special characters, but there is no need for a regex in your example.String regex argument, like split, matches and replaceAll for example.You have to change your code like this:
String s1= "this is amount <AMOUNT> you must pay";
s1 = s1.replaceAll("<AMOUNT>", "\\$2.60");
System.out.print(s1);
1) escape $ character
2) you need to save the result of replaceAll method, so assign it to s1 again.
Just use replace instead. No need to use regular expression.
s1 = s1.replace("<AMOUNT>", "$2.60");
s1! :)Regular expressions use the special character $ to indicate a group in the expression. That's why you got confused. If you want the literal thing, just escape it.
public static void main(String[] args) {
String s1= "this is amount <AMOUNT> you must pay";
System.out.print(s1.replaceAll("<AMOUNT>", "\\$2.60"));
}
When not using regex, you should use replace().
Also you should store the resulting string somewhere else, like
String s1 = "this is amount <AMOUNT> you must pay";
String s2 = s1.replace("<AMOUNT>", "$2.60");
System.out.println(s2);
use double slash \\ before $ symbol.
String s1 = "this is amount <AMOUNT>you must pay";
s1 =s1.replaceAll("<AMOUNT>", "\\$2.60");
System.out.print(s1);
