Question

Hello,

In need of help with this Java pa homework. Thank you!

2. Create a normal (POJo, JavaBean) class to represent, i. e. model, varieties of green beans (also known as string beans or snap beans). Following the steps shown in "Assignment: Tutorial on Creating Classes in IntelliJ", create the class in a file of its own in the same package as class Main. Name the class an appropriate name. The class must have (a) private field variables of appropriate types for variety, pod length and number of seeds in the pod. Variety must not be set to empty. Pod length must be set to a value greater than zero. The number of seeds in the pod must be zero or greater. (b) a public getter (accessor) and setter (mutator, manipulator) for each private field variable. The getters must not have parameters. The setters must have only one parameter. (c) a public default constructor, i. e. a constructor without parameters. (d) a parametrized constructor, i. e. a constructor with parameters, one parameter for each of the private field variables. 3. In the class Main, (a) create a void method that when passed an array of green bean class type, outputs the information about each green bean object referenced by the elements of the array passed to the method. If an element of the array has the value null, nothing is output for that element. (b) Create a method that when passed an array of green bean class type, returns the average length of the pods of the beans referenced by the elements in the array. Be sure to not count or try to get data from the elements or the array that have the value null. (c) Create a method that when passed an array of green bean class type, returns the average number of seeds in the pods of the beans referenced by the elements in the array. Be sure to not count or try to get data from the elements or the array that have the value null

Answer 1

Main.javaVarBeans,java 1 package new11; 2 3 import java.text.DecimalFormat; 4 5 public class Main 7 //method print out the information about each beans 8 public static void infoGreenBean (VarBeans] green) 9 10 for (int i 0; i < green.length; i++) 12 13 14 15 16 17 18 19 20 21 try //condition for null or zero if (green [i].getVariety() != null && green[i].get Length() != 0 && green[i].getSeedNum() //toString method for return the information about each bean System.out.println("Beans " (i+1) "has +green[i].toString()) catch (Exception e) { System.out.println("Beans "+ (i+1) " has"No information availabel for this t 23 R. Problems @Javadoc Declaration貝Console X <terminated Mai [Java Application] C:Program Files (86)Java\jrel.8.0 191\ bin\javaw.exe (Feb 27, 2019, 9:20:12 PM Beans 4 has variety-purple string beans, length-5.5, seedNum-22.0 Beans 5 has: variety-flat beans, length-2.5, seedNum-14.0 Beans 6 has variety-wax beans, length-3.5, seedNum-15.0 Beans 7 has variety bush beans, length 4.5, seedNum-18.0 Beans 8 has No information availabel for this type of beans Beans 9 has No information availabel for this type of beans Beans 10 has No information availabel for this type of beans Average length of Beans is: 4.22 Average number of seeds in Bean class: 13.40 圖ㄨ

Main.java:

package new11;

import java.text.DecimalFormat;

public class Main {

//method print out the information about each beans
public static void infoGreenBean(VarBeans[] green) {

for (int i = 0; i < green.length; i++) {

try{
  
//condition for null or zero
if (green[i].getVariety() != null && green[i].getLength() != 0 && green[i].getSeedNum() != 0) {
  
//toString method for return the information about each bean
System.out.println("Beans "+ (i+1) + " has : "+green[i].toString());
}
  
}catch (Exception e) {
System.out.println("Beans "+ (i+1) + " has : "+"No information availabel for this type of beans");
}
}
}
//method return the average length of beans
public static double averageLength(VarBeans[] green) {

double avgLength = 0;
double totalLenght = 0;
for (int i = 0; i < green.length; i++) {
try{
if(green[i].getLength()!=0){
totalLenght = totalLenght + green[i].getLength();
}
}catch (Exception e) {
  
}
}
avgLength = totalLenght/green.length;
return avgLength;
}

//method return the avg number of seeds in the beans
public static double averageNumSeeds(VarBeans[] green) {

double avgNumSeeds = 0;
double totalSeeds = 0;
//for loop for iterate the array
for (int i = 0; i < green.length; i++) {
try{
if(green[i].getSeedNum()!=0){
totalSeeds = totalSeeds + green[i].getSeedNum();
}
}catch (Exception e) {
  
}
}
avgNumSeeds = totalSeeds/green.length;
return avgNumSeeds;
}

public static void main(String[] args) {

//This is for limit the decimal places
DecimalFormat numberFormat = new DecimalFormat("#.00");
//Creating array of VarBeans class
VarBeans[] greenBeans = new VarBeans[10];
//Add beans in the object
greenBeans[0] = new VarBeans("string beans", 8.0, 23);
greenBeans[1] = new VarBeans("filet beans", 4.5, 12);
greenBeans[2] = new VarBeans("long beans", 13.7, 30);
greenBeans[3] = new VarBeans("purple string beans", 5.5, 22);
greenBeans[4] = new VarBeans("flat beans", 2.5, 14);
greenBeans[5] = new VarBeans("wax beans", 3.5, 15);
greenBeans[6] = new VarBeans("bush beans", 4.5, 18);
  
//calling three methods
infoGreenBean(greenBeans);
double avgLength = averageLength(greenBeans);
double avgSeeds = averageNumSeeds(greenBeans);
//printing non void method's returned value
System.out.println("Average length of Beans is: "+numberFormat.format(avgLength));
System.out.println("Average number of seeds in Bean class: "+ numberFormat.format(avgSeeds));
}

}

VarBeans.java:

package new11;

public class VarBeans {

   //private fields
   private String variety;
   private double length;
   private double seedNum;

   //default constructor
   public VarBeans() {
   variety = "";
   length = 0;
   seedNum = 0;
   }

   /**
   *
   * @param variety
   * @param length
   * @param seedNum
   */
   //Parameterized constructor
   public VarBeans(String variety, double length, double seedNum) {
   super();
   this.variety = variety;
   this.length = length;
   this.seedNum = seedNum;
   }

   //getter and setter
   public String getVariety() {
   return variety;
   }

   public void setVariety(String variety) {
   if (!variety.isEmpty()) {
   this.variety = variety;
   }
   }

   public double getLength() {
   return length;
   }

   public void setLength(double length) {
   if (length > 0) {
   this.length = length;
   }
   }

   public double getSeedNum() {
   return seedNum;
   }

   public void setSeedNum(double seedNum) {
   if (seedNum > 0) {
   this.seedNum = seedNum;
   }
   }

   //toString method
   @Override
   public String toString() {
   return "variety=" + variety + ", length=" + length + ", seedNum=" + seedNum;
   }
  

   }