How can I get a list of characters in a string that come after a substring? Is there a built-in String method for doing this?
List<String> characters = new ArrayList<>();
String string = "Grid X: 32";
// How can I get the characters that come after "Grid X: "?
I know you could do this with a loop, but is there another way that may be simpler?
Just grab the characters after the ": "
String string = "Grid X: 32"
int indexOFColon = string.indexOf(":");
String endNumber = string.subString(indexOFColon + 2);
So you get the index of the colon, which is 6 in this case, and then grab the substring starting 2 after that, which is where your number starts.
There are two possibilities:
Use a regular expression (regex):
Matcher m = Pattern.compile("Grid X: (\\d+)");
if (m.matches(string))
{
int gridX = Integer.parseInt(m.group(1));
doSomethingWith(gridX);
}
Use the substring method of the string:
int gridX = Integer.parseInt(string.substring(string.indexOf(':')+1).trim());
doSomethingWith(gridX);
Below code can be used for getting list of chacters :-
String gridString = "Grid X: 32";
String newString = gridString.subSubString(gridString.indexOf(gridString ) + gridString .length );
char[] charArray = newString.toCharArray();
Set nodup = new HashSet();
for(char cLoop : charArray){
nodup.add(cLoop);
}
There is more than one way to get this done. The simplest is probably just substring. But it is fraught with danger if the string doesn't actually start with "Grid X: "...
String thirtyTwo = string.substring( s.indexOf("Grid X: ") + "Grid X: ".length() );
Regex is pretty good at this too.
