Classes and objects in Java must be initialized before they are used. You’ve previously learned that class fields are initialized to default values when classes are loaded, and that objects are ...

Every character in the String is counted ... length cannot be resolved or is not a field Also be sure to initialize the Java String before you invoke the length() method, or else a NullPointer runtime ...

A Java string is a sequence of characters that exists as an object of the class java.lang. Java strings are created and manipulated through the string class. Once created, a string is immutable -- its ...