Step 2: Create a Separate Builder.java file and define a Builder Class

Examining the problem, we need to create a Builder class, declare Builder class as follows

public class Builder { }

Inside the Builder class, declare a String variable called name.

Step 3: Defining the constructors:

Remember that the purpose of a constructor is to assign valid values to all the data members.

public Builder (String name) { // write the segment of code // that assigns the parameter value to the private instance variable }

Step4: Supply the methods

Implement the getName method:

Hint: getter methods often simply return the desired value, which is usually stored in a private instance variable.

public String getName() { // write a line of code that returns the name }

Implement a makeRow method.

Given an integer n and string s, the makeRow method returns an other String that has n copies of s in a row. For eaxmple makeRow(5, "abc") should return "abcabcabcabcabc".

public String makeRow(int n, String s) { // Given an int n and string s, // return a string that represents n copies of s in one row. //Example: n = 5, s = *, return a string ***** }

Write a method called printPyramid that given an odd integer n and a string s, prints (not returns) a pyramidal shape made out of that string s. The top of the pyramid has a single copy of s, and each successive row has two additional copies of s. The last row contains n copies of s. For example, calling printPyramid(7, "*"); prints the following lines:

 * *** ***** *******

public void printPyramid(int n, String s) { // Make use of makeRow method and System.out.println // to print the pyramid. // note this method does not return anything. }

Step 5: Calling the constructor of Builder class from the main method.

In your Lab7.java file, you will instantiate and use a Builder class object.

import java.util.Scanner; public class Lab7 { public static void main(String[] args) { //declare variables where you will store inputs from user --> // declare a Scanner object --> // prompt the user for input string name --> // store the input in the declared variables --> // declare a variable of type Builder named myBuilder // and instantiate a brand-new builder object // with the name given by the user above --> } }

Hint: Do not forget to import the Scanner package at the very top of your program.

Step 6: Calling Builder class methods and display the output

Now (also in the main method) we will call the methods in the Builder class to display the required outputs.

// call the getName() method to get the name of the builder. --> // Ask for integer n from user using Scanner class System.out.println("Enter a positive integer:"); // Using your builder's makeRow method print a string below, // Example: =====*****===== with n = 5; --> // Ask for odd integer t from user using Scanner class System.out.println("Enter a positive odd integer :"); // Call the Builder method printPyramid, passing t and "*" as the arguments // to print pyramid with * as a string. -->

Step 7: Sample Output

Below is an example of what your output should roughly look like when this lab is completed. All text in bold red represents user input.

First run:

Name of the builder: Alex The name of builder is :Alex Enter a positive integer :5 =====*****===== Enter a positive odd integer :7 * *** ***** *******

Second run:

Name of the builder: Bob The name of builder is :Bob Enter a positive integer :3 ===***=== Enter a positive odd integer :11 * *** ***** ******* ********* ***********