Exam 7: Characters Strings and the Stringbuilder

StringBuilder greeting = new StringBuilder("Hello, John"); char initial = greeting.charAt(7); Using the above code and the charAt() method, what value will be assigned to the variable initial ?

String greeting = "Welcome Home"; Using the above String , create the String method to convert the greeting String to all uppercase. Likewise, create the String method to convert the greeting String to all lowercase.

String firstString = "Oak Maple Pine" String secondString = "spruce Maple elm" firstCompare.regionMatches(4, secondString, 7, 5) Using the above code, what will be the Boolean value after execution of the regionMatches statement? Explain how the String s are compared using the regionMatches() method.

yourCounty = "Clark" yourCounty.startsWith("Cla") What value will be returned by the startsWith() method? Explain how the startsWith() method deals with case sensitivity.

String greeting = "Welcome back"; Using the above statement, write the length() method that will return the length of the greeting String . Store the length in an integer named greetingLength .

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 String class ____ method evaluates the contents of two String objects to determine if they are equivalent.

myCounty = "Clark Jackson Scioto" myCounty.charAt(6) Using the above code, what will be the value of the charAt() method once the code executes? Explain how the charAt() method operates.

To alter just one character in a StringBuilder , you can use the ____ method, which allows you to change a character at a specified position within a StringBuilder object.

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

String s and other objects that can't be changed are known as ____.

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

System.out.println("Your name is " + yourName); The above statement is an example of ____, which is used to join String s.

The ____ method converts any object to a String .

The terms "literal string" and "string literal" are entirely different in Java programming.

The methods of the Character class that begin with ____ return a character that has been converted to the stated format.

Why would you use the append() method? Provide an example.

What is a wrapper and why would you use it?

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