Question

IN JAVA

Overview

In this project you will implement a Java program that will print several shapes and patterns according to uses input. This program will allow the use to select the type (say, rectangle, triangle, or diamond), the size and the fill character for a shape. All operations will be performed based on the user input which will respond to a dynamic menu that will be presented. Specifically, the menu will guide the user to decide between different forms to print in text mode. The forms to select from will be rectangle, triangle. and diamond. Additionally. there will be a pattern to print which will be explained later in this document. The size of the form/pattern will be also determined by the user which will be validated to be complying with specific values depending on the form.

Description

This section describes as detailed as possible all the options that need to be accomplished in the project.

Main Method

The main method must print as the first line of output

Project 2: Developed by John Smith

Note that you should replace the text John Smith with your name. It will then call getMenuSelection() to start the rest of the operations of this program.

Menu Options

The menu should be implemented with two methods:

Please, select one of the following options
0. Exit
1. Print a Rectangle
2. Print a Triangle
3. Print a Diamond
4. Print a Pattern
  

• printMenu(). This method will print the following menu.
• getMenuSelection(). This method will use the printMenu() method to print the menu, and validate that the user inputs a correct value from 0 to 4. If the user input is invalid, print a message "Incorrect selection, please try again", and print the menu again. This should repeat until correct input is obtained from the user. If user enters a valid input, this method will do the following based on user's input.
  • 0: Prints the message "Thank you for using this program, Good bye!" and exits the program.
  • 1: Call the method makeRectangle (see description later).
  • 2: Call the method makeTriangle.
  • 3: Call the method makeDiamond.
  • 4: Call the method printPattern.

Rectangle Shape

You should implement the following three methods to print a rectangle shape.

• public static void printRectangleLine(int size, char fillChar, Boolean hollow). This method will print a line of size filled with the character fillChar, unless hollow is true, in that case, only print fillChar at the first and the last position and print a blank character at all other positions.
• public static void printRectangle(int length, int width, char fillChar, Boolean hollow). This method will use printRectangleLine() method to print a rectangle shape with the given length and width, If the hollow is true, the shape will be hollow rectangle, otherwise a filled rectangle. This method must not interact with the user.
• public static void makeRectangle(Scanner scnr). This method will prompt the user for entering the length, width, fillChar and the choice of fill or not fill. For this project, we limit the width of a rectangle to no more than 80 characters. This method must validate the input. Once the user entered valid input, this method will call the printRectangle() method to print the shape.

Triangle Shape (Using Nested Loops)

You should implement the following two methods to print a triangle shape.

• public static void printTriangle(int width). This method will print a hollow equi-side triangle with the given width. The left side should be printed with character '/', the right side with '\' and the bottom with '_'. This method must use a nested for-loop to print the shape.
• public static void makeTriangle(Scanner scnr). This method will prompt the user for entering the width. We limit the width of a rectangle to no more than 80 characters. Again, this method must validate the user's input and call the method printTriangle().

Diamond Shape

You should implement the following three methods to print a diamond shape.

• public static void printNChars(int n, char c)). This method will print n times the character c in a row,
• public static void printDiamond(int size, char edgeChar, char fillChar). This method will call printNChars() method to print the shape. It will use the edgeChar to print the sides and the fillChar to fill the interior of the shape. The shape will have a height and a width of the given size.
• public static void printDiamond(Scanner scnr). This method will prompt the user for entering the size, the edgeChar and the fillChar. We limit the size to no more than 80 characters. Again, this method must validate the user's input. Notice that this method has the same name as the previous method but has a different set of parameters.

Pattern Shape (Using Nested Loops)

You should implement the following two methods to print a triangle shape.

9 8 7 6 5 4 3 
  8 7 6 5 4 3 
    7 6 5 4 3 
      6 5 4 3 
        5 4 3 
          4 3 
            3 
  

• public static void printPattern(int num1, int num2, Boolean ascending). This method will print a upper-triangle matrix-like layout filled will a sequence of integers between num1 and num2 inclusive. Each subsequent row will contain the postfix of the previous row. For example for num1=3 and num2=9, the pattern should look like the follows.
• If the ascending is true, the numbers should printed in the ascending order.
• public static void printPattern(Scanner scnr). This method will prompt the user for entering thenum1, num2, and ascending, and call the other method to print the pattern. Again, this method must validate the user's input. Notice that this method have the same name as the previous method but has a different set of parameters.

Sample Input/Output

Please refer to this link for sample input/output expected of this program.

Rubric

• [2 points] Menu works with all the requirements stated above:
  • It iterates until 0 is input.
  • If is selected any value from 1 to 4, it calls the different methods for the different classes.
  • If it shows the farewell message when 0 is selected.
• [3 points] Prints the rectangle:
  • Asks correctly for the values allowed.
  • If the value is incorrect it keeps looping and shows the indications again.
  • Prints the rectangle with the size selected by the user.
  • It uses the three methods to print the rectangle as specified above.
• [4 points] Prints the triangle:
  • Asks correctly for the values allowed.
  • If the value is incorrect it keeps looping and shows the indications again. Pay attention that here it has to be a pair between 1 and 80.
  • Prints triangle with the size selected by the user using nested loops.
• [4 points] Prints the diamond:
  • Asks correctly for the values allowed.
  • If the value is incorrect it keeps looping and shows the indications again. Pay attention that here it has to be a pair between 1 and 80.
  • Prints the diamond with the size selected by the user using the different method calls.
  • The program asks and prints the different values to output outside and inside the contour of the program.
• [5 points] Prints the pattern:
  • Asks correctly for the values allowed.
  • If the values are incorrect it keeps looping and shows the indications again. Pay attention that here it has to be any integer value between 0 and 9.
  • Asks the user if the numbers will be printed in ascending or descending order and loop until a valid value is input.
  • Prints the pattern with the numbers and sorted the user inputs.

Answer 1

JAVA CODE

package miscellaneous;
import java.util.Scanner;
public class console {
   public static void makeRectangle(Scanner scnr) {
       System.out.println("Enter Length: ");
       int length = scnr.nextInt();
       int width =0;
       while(true) {
           System.out.println("Enter Width: ");
           width = scnr.nextInt();
           if(width<=0 || width>80) {
               System.out.println("Invalid Width(max->80)");
               continue;
           }
           else {
               break;
           }
          
       }
      
       System.out.println("Enter fill character: ");
       char c = scnr.next().charAt(0);
       System.out.println("Fill or not fill(y/n): ");
       String f = scnr.next();
       if(f.equals("y")) {
           printRectangle(length,width,c,false);
       }
       else {
           printRectangle(length,width,c,true);
       }
      
   }
  
   public static void printRectangleLine(int size, char fillChar, Boolean hollow) {
       if(!hollow) {
           for(int i=0;i<size;i++) {
               System.out.print(fillChar);
           }
           System.out.println();
       }
       else {
           for(int i=0;i<size;i++) {
               if(i==0 || i==size-1) {
                   System.out.print(fillChar);
               }
               else {
                   System.out.print(" ");
               }
           }
           System.out.println();
       }
   }
  
   public static void printRectangle(int length, int width, char fillChar, Boolean hollow) {
       if(hollow) {
           for(int j=0;j<length;j++) {
               if(j==0 || j==length-1) {
                   printRectangleLine(width,fillChar,!hollow);
               }
               else {
                   printRectangleLine(width,fillChar,hollow);
               }
              
           }
          
       }
       else {
           for(int j=0;j<length;j++) {
               printRectangleLine(width,fillChar,hollow);
           }
       }
   }
  
  
  
   static void makeTriangle(Scanner scnr) {
       int width=0;
       while(true) {
           System.out.println("Enter Width: ");
           width = scnr.nextInt();
           if(width<=0 || width>80) {
               System.out.println("Invalid Width(max->80)");
               continue;
           }
           else {
               break;
           }
          
       }
       printTriangle(width);
   }
  
   public static void printTriangle(int width) {
       for(int i=1;i<width;i++)
   {
   for(int j=i;j<width;j++)
   {
   System.out.print(" ");
   }
   for(int j=1;j<=(2*i-1);j++)
   {
       if(j==1) {
           System.out.print("/");
       }
       if(j==(2*i)-1) {
           System.out.print("\\");
       }
       else {
           System.out.print(" ");
       }
     
   }
   System.out.println("");
   }
       for(int i=0;i<width*2;i++) {
           System.out.print("_");
       }
   }
  
   static void printDiamond(Scanner scnr) {
       int size =0;
       while(true) {
           System.out.println("Enter size: ");
           size = scnr.nextInt();
           if(size<=0 || size>80) {
               System.out.println("Invalid size(max->80)");
               continue;
           }
           else {
               break;
           }
       }
       System.out.println("Enter edge char: ");
       char echar = scnr.next().charAt(0);
       System.out.println("Enter fill char: ");
       char fillchar = scnr.next().charAt(0);
       printDiamond(size,echar,fillchar);
   }
  
   public static void printNChars(int n, char c){
       for(int i=0;i<n;i++) {
           System.out.print(c);
       }      
   }
  
   public static void printDiamond(int size, char edgeChar, char fillChar) {
       int i,j;
       int space=size-1;
       for (j = 1; j <= size; j++)
{
           printNChars(space,' ');
space--;
System.out.print(edgeChar);
printNChars(2*j-3,fillChar);
if(2*j-3!=-1) {
   System.out.print(edgeChar);
}
  
System.out.println("");
}
space = 1;
for (j = 1; j <= size - 1; j++)
{
   printNChars(space,' ');
space++;
System.out.print(edgeChar);
printNChars(2*(size-j)-3,fillChar);
if(2*(size-j)-3!=-1) {
   System.out.print(edgeChar);
}
  
System.out.println("");
}
   }
  
   static void printPattern(Scanner scnr) {
       int num1=0,num2=0;
       String asc="";
       while(true) {
           System.out.println("Enter num1: ");
           num1 = scnr.nextInt();
           if(num1<0 || num1>9) {
               System.out.println("Invalid value! Must be between 0-9(inclusive).\nEnter again:");
               continue;
           }
           break;
       }
       while(true) {
           System.out.println("Enter num2: ");
           num2 = scnr.nextInt();
           if(num2<0 || num2>9) {
               System.out.println("Invalid value! Must be between 0-9(inclusive).\nEnter again:");
               continue;
           }
           break;
       }
       if(num1>num2) {
           int temp=num1;
           num1=num2;
           num2=temp;
       }
       while(true) {
           System.out.println("Ascending triangle?(y/n):");
           asc = scnr.next();
           if(asc.equals("y") || asc.equals("n")) {
               break;
           }
           else {
               System.out.println("Invalid Input.Enter either y or n: ");
               continue;
           }
       }
          
       if(asc.equals("y")) {
           printPattern(num1,num2,true);
       }
       else {
           printPattern(num1,num2,false);
       }
      
      
   }
  
   public static void printPattern(int num1, int num2, Boolean ascending) {
       if(ascending) {
           int c=0;
           for(int i=num1;i<=num2;i++) {
               for(int j=num2;j>=num2-c;j--) {
                   System.out.print(j+" ");
               }
               c+=1;
               System.out.println();
           }
       }
       else {
           int c=0;
           for(int i=num2;i>=num1;i--) {
               for(int k=0;k<c;k++) {
                   System.out.print(" ");
               }
               for(int j=num2-c;j>=num1;j--) {
                   System.out.print(j+" ");
               }
               System.out.println();
               c+=1;
           }
          
       }
      
   }

   static void printMenu() {
       System.out.println("Please select one of the following options : ");
       System.out.println("0.Exit");
       System.out.println("1.Print a Rectangle");
       System.out.println("2.Print a Triangle");
       System.out.println("3.Print a Diamond");
       System.out.println("4.Print a Pattern");
   }
   static void getMenuSelection() {
       Scanner sc = new Scanner(System.in);
       while(true) {
           printMenu();
           int choice = sc.nextInt();
          
           if(choice==0) {
               System.out.println("Thank you for using this program, Good bye!");
               break;
           }
           if(choice==1) {
               makeRectangle(sc);
               continue;
           }
           if(choice==2) {
               makeTriangle(sc);
               System.out.println();
               continue;
           }
           if(choice==3) {
               printDiamond(sc);
               continue;
           }
           if(choice==4) {
               printPattern(sc);
               continue;
           }
           else {
               System.out.println("Incorrect selection!Please try again.");
               continue;
           }
              
       }
   }

   public static void main(String[] args) {
       System.out.println("Project 2:Developed by YOUR NAME");
       getMenuSelection();

   }

}

Screenshot of code

Sample Output