Question 1

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

Accepted Answer

The answer of Why would you use the append() method?...

Question 2

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

Accepted Answer

The answer of yourCounty = "Clark" 
yourCounty.startsWith("Cla") 
What value will...

Question 3

How can you change the length of a String in a StringBuilder object?

Accepted Answer

The answer of How can you change the length of...

Question 4

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 .

Accepted Answer

The answer of String greeting = "Welcome back"; 
Using the...

Question 5

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.

Accepted Answer

The answer of String firstString = "Oak Maple Pine" 
String...

Question 6

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 ?

Accepted Answer

The answer of StringBuilder greeting = new StringBuilder("Hello, John"); 
char...

Question 7

String s  and other objects that can't be changed are said to be immutable. What does this mean and how does it relate to values held in memory addresses?

Accepted Answer

The answer of String s  and other objects that can't...

Question 8

StringBuilder greeting = new StringBuilder("Welcome"); 
Use the append() method to add the characters "home" to the end of the StringBuilder object created above.

Accepted Answer

The answer of StringBuilder greeting = new StringBuilder("Welcome"); 
Use the...

Question 9

StringBuilder greeting = new StringBuilder("Day 1"); 
Using the above StringBuilder , create a setCharAt() method that will change the "1" to a "2" in the String "Day 1" . Explain how the setCharAt() method operates.

Accepted Answer

The answer of StringBuilder greeting = new StringBuilder("Day 1"); 
Using...

Question 10

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.

Accepted Answer

The answer of String example1 = ""; 
String example2 =...

Question 11

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.

Accepted Answer

The answer of String greeting = "Welcome Home"; 
Using the...

Question 12

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 .

Accepted Answer

The answer of import javax.swing.JOptionPane; 
public class Practice 
{ 
    public...

Question 13

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

Accepted Answer

The answer of How can you use String methods to...

Question 14

What is the purpose of the substring() method and how do you use it?

Accepted Answer

The answer of What is the purpose of the substring()...

Question 15

String aName = "Michael" 
Using the above statement, write the length() method that will return the length of the aName String . What value will the length() method return when executed?

Accepted Answer

The answer of String aName = "Michael" 
Using the above...

Question 16

What is a wrapper and why would you use it?

Accepted Answer

The answer of What is a wrapper and why would...

Question 17

What is the purpose of the replace() method? Provide an example.

Accepted Answer

The answer of What is the purpose of the replace()...

Question 18

StringBuilder greeting = new StringBuilder("Welcome home "); 
phrase.insert(13, "Joe"); 
Using the above code and insert() method, describe how the phrase will appear after the code executes. How does the insert() method work?

Accepted Answer

The answer of StringBuilder greeting = new StringBuilder("Welcome home ");...

Question 19

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.

Accepted Answer

The answer of myCounty = "Clark Jackson Scioto" 
myCounty.charAt(6) 
Using...

Question 20

yourCounty = "perry"; 
yourCounty.equals("Perry"); 
yourCounty.equalsIgnoreCase("Perry"); 
Using the above statements, what value will be returned by the equals() method? What will be the value of the equalsIgnoreCase() method? Explain how the equalsIgnoreCase() method can be useful when users type responses to prompts in programs.

Accepted Answer

The answer of yourCounty = "perry"; 
yourCounty.equals("Perry"); 
yourCounty.equalsIgnoreCase("Perry"); 
Using the...

Quiz 7: Characters, Strings and the Stringbuilder

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

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

How can you change the length of a String in a StringBuilder object?

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 .

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 s and other objects that can't be changed are said to be immutable. What does this mean and how does it relate to values held in memory addresses?

StringBuilder greeting = new StringBuilder("Welcome"); Use the append() method to add the characters "home" to the end of the StringBuilder object created above.

StringBuilder greeting = new StringBuilder("Day 1"); Using the above StringBuilder , create a setCharAt() method that will change the "1" to a "2" in the String "Day 1" . Explain how the setCharAt() method operates.

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.

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.

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

What is the purpose of the substring() method and how do you use it?

String aName = "Michael" Using the above statement, write the length() method that will return the length of the aName String . What value will the length() method return when executed?

What is a wrapper and why would you use it?

What is the purpose of the replace() method? Provide an example.

StringBuilder greeting = new StringBuilder("Welcome home "); phrase.insert(13, "Joe"); Using the above code and insert() method, describe how the phrase will appear after the code executes. How does the insert() method work?

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.

Quiz 7: Characters, Strings and the Stringbuilder

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

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

How can you change the length of a String in a StringBuilder object?

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 .

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 s and other objects that can't be changed are said to be immutable. What does this mean and how does it relate to values held in memory addresses?

StringBuilder greeting = new StringBuilder("Welcome"); Use the append() method to add the characters "home" to the end of the StringBuilder object created above.

StringBuilder greeting = new StringBuilder("Day 1"); Using the above StringBuilder , create a setCharAt() method that will change the "1" to a "2" in the String "Day 1" . Explain how the setCharAt() method operates.

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.

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.

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

What is the purpose of the substring() method and how do you use it?

String aName = "Michael" Using the above statement, write the length() method that will return the length of the aName String . What value will the length() method return when executed?

What is a wrapper and why would you use it?

What is the purpose of the replace() method? Provide an example.

StringBuilder greeting = new StringBuilder("Welcome home "); phrase.insert(13, "Joe"); Using the above code and insert() method, describe how the phrase will appear after the code executes. How does the insert() method work?

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.

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 ?