java - How to make substring() read a string until a certain character? -


i want create substring say:

string s1 = "derp123";  s2 = s1.substring(0, *index there's number*);

is there way can achieve other using replaceall method?

i don't want replace numbers in string, want stop reading string once method detects number 0-9.

for this, regular expression friend.

i'll show code example, should learn more power (and limitations) of regular expressions. see javadoc of pattern.

string s1 = "derp123"; matcher m = pattern.compile("^\\d*").matcher(s1); if (m.find())     system.out.println(m.group()); // prints: derp

note replaceall() method shown in comments using regular expression.


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