Hi all I am hoping to strip a string in Java into a String and an integer for example:
"String1"
into:
String StringName = "String";
int StringInt = 1;
the Strings also may vary in length, is there an easy way to do this in Java, apologies if easy complete newbie.
You can do this with a regular expression: (.*?)(\\d+)$
Let me explain this starting at the end. $ matches the end of the string (I am not considering multi line strings here). \d (in java code needs to be escaped as \\d) matches any digit, so the last capturing group matches the integer at the end of the string. The first group matches all characters in front of that. A non-greedy evaluation *? is required in the first group, otherwise it would just match the whole string.
As a whole working example:
Matcher m = Pattern.compile("(.*?)(\\d+)$").matcher(yourString);
if (m.matches()) {
String stringPart = m.group(1);
int intPart = Integer.parseInt(m.group(2));
}
If the number is always at the end of your string, write a method that iterates through the string starting from the end until you hit a non-integer character and then take the substring using the index you've just found. This will probably be faster than regex in most cases since iterating through the end of the string will be O(n) (where n=[num_integers]) + O(1) for the substring method.
String stringName[<maximum length>]
int stringInt;
for( int i = 0; i < originalString.length(); i++){
if(isDigit(originalString[i]){
stringInt = originalString[i];
}
else{
stringName[i] = originalString[i];
}
}
This should move all characters from your original string into stringName unless an integer value comes along which will be save in stringInt
I would suggest to use the regular expression.
String value = "string12asd";
String intValue = value.replaceAll("[^0-9]", "");
String stringValue = value.replaceAll("[0-9]","");
System.out.println("int are: "+intValue+" \n string are: "+stringValue);
Look at http://www.regular-expressions.info/tutorial.html for more detail about regular expression.
StringWith1DigitBeforeEnd123?