Question 1

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 above...

Question 2

StringBuilder greeting = new StringBuilder("Welcome");
Create 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");
Create the append()...

Question 3

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 static void main(String[]...

Question 4

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

Accepted Answer

The answer of String firstCompare = "Oak Maple Pine"
String secondCompare...

Question 5

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 statement,...

Question 6

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 above...

Question 7

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 ");
phrase.insert(13,...

Question 8

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 above statements, what...

Question 9

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 be returned...

Question 10

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

Accepted Answer

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

Question 11

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 the...

Question 12

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 the...

Question 13

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 initial...

Quiz 7: Characters, Strings, and the Stringbuilder

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("Welcome"); Create the append() method to add the characters "home" to the end of the StringBuilder object created above.

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?

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.

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?

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

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

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("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.

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?