For more information, see the Java documentation on String.charAt. If you want another simple tutorial, this one or this one. If you don't want the result as a char data type, but rather as a …

Mar 2, 2011 · You've got several questions mixed up together. Broadly, yes, str.charAt(str.length() - 1) is usually the last character in the string; but consider what happens if str is empty, or null.

In your original version, "f" is a String and fieldNames.charAt(4) is a char, and you cannot compare a String with a char using ==. If you write 'f' instead of "f" (as above) you will be …

Dec 19, 2012 · char charAtAnyPos= input.charAt(pos); // in pos you enter that index from where you want to get the char from By the way, you can't take a char directly as an input.

May 9, 2013 · The Unicode character set is a super set of ASCII. So there can be characters in a Java string that do not belong to ASCII. Such characters do not have an ASCII numeric value, …

Sep 30, 2015 · I am trying to make a program that uses three digit numbers to identify items and I am trying to use something like the charAt method for integers or something.

Nov 17, 2011 · } Source code from String.java in Java 8 source code Hence String.valueOf(char) seems to be most efficient method, in terms of both memory and speed, for converting char to …

Apr 26, 2014 · If I want to check every char in a String using String.charAt(int i), would it count from start every time or it is converted to an array automatically and get the charAt index directly?

In Java, string[i] is not the i th index of the string. Instead, if you had defined string as an array (e.g., String[] string = new String[10]), then string[i] would refer to the i th element in the array.

String.charAt (i) does that lookup as far as I am aware. Copying the string to a new array (which is what I understand String.toCharArray () to do) introduces a new and different overhead. Is …