Exam 7: Characters, Strings and the Stringbuilder

​Give a code example of using the equivalence operator ("==") to compare the addresses of two strings where the comparison will result in the value true . The example should produce output indicating the strings have the same value.

The ____ method lets you add characters at a specific location within a StringBuilder object.

How can you use String methods to change the case of a string? Provide an example.

A StringBuilder object contains a memory block called a _____, which might or might not contain a string.

String example1 = ""; String example2 = null; String example3; There is an important difference between empty String s and null String s. Explain the differences and why it is important when making String comparisons.

Any string value that is input into a program can be used in arithmetic operations.

When you compare String s with the == operator, you are comparing their values, not their memory addresses.

The ____ method and the  startsWith()  method each take a  String  argument and return  true  or  false  if a  String  object does or does not end or start with the specified argument, respectively.

The creators of Java chose ____ characters as the "extra" length for a StringBuilder object.

The ____ method allows you to replace all occurrences of some character within a String .

What is a wrapper and why would you use it?

import javax.swing.JOptionPane; public class Practice {     public static void main(String[] args)     {      String fullName;      char firstLetter; ____ ____     } } Accepting a String from a user is common practice. Using the above code, write the statements to accept a String response from a user. Prompt the user with "Enter your name". Then use the charAt() method to extract the first character of the String .

The  String  class ____ method is similar to the  equals()  method. As its name implies, this method does not consider case when determining if two  String s are equivalent.

When the String class ____ method is used to compare two String s, it provides additional information to the user in the form of an integer value.

How is the String class equalsIgnoreCase() method like the equals() method and how would you use it? Give an example.

In the above code, two strings are evaluated using the equivalency operator. Why can this be a problem, and what other methods are offered by Java for working with characters and strings?