Posting 3 times , still not get right answer (The MyInteger class) Design a class named...

Posting 3 times , still not get right answer

(The MyInteger class) Design a class named MyInteger. The class contains:

* An int data field named value that stores the int value represented by this object.

* A constructor that creates a MyInteger object for the specified int value. A getter method that returns the int value.

* The methods isEven(), isOdd(), and isPrime() that return true if the value in this object is even, odd, or prime, respectively.

* The static methods isEven(int), isOdd(int), and isPrime(int) that return true if the specified value is even, odd, or prime, respectively.

* The static methods isEven(MyInteger), isOdd(MyInteger), and isPrime(MyInteger) that return true if the specified value is even, odd,or prime, respectively.

* The methods equals(int) and equals(MyInteger) that return true if the value in this object is equal to the specified value.

* A static method parseInt(char[]) that converts an array of numeric characters to an int value.

* A static method parseInt(String) that converts a string into an int value.

Write a client program that tests all methods in the class. Given that the definition of a prime number is a positive integer be sure to instruct the use to only enter positive integers.

SAMPLE RUN #1

--- Prompts For Keyboard/Console/Standard Input ---

Enter a positive integer to create a MyInteger object or to move on to next part of program:
Enter a positive integer to test static isXXX(int) methods or to move on to next part of program:
Enter a positive integer to test static isXXX(MyInteger) methods or to move on to next part of program:
Enter a the first of two positive integers to create obj2 and test obj2.equals(int) or to move on to next part of program:
Enter a the second of two positive integers to test obj2.equals(int):
Enter a the first of two positive integers to create obj2 and test obj2.equals(MyInteger obj3) or to move on to next part of program:
Enter a the second of two positive integers to create obj3 and test obj2.equals(MyInteger obj3):
Enter a positive integer that will be placed into a char[] array to demonstrate the MyInteger.parseInt(char[]):
Enter a positive integer that will be placed into a String to demonstrate the MyInteger.parseInt(String):

Inputs

--- Keyboard/Console/Standard Input stdin ---

1
2
3
7
8

1
2
19
23
24

1
2
5
22
19

22
22
33
33
33
34

11
11
1
1
1
2

125
256

333
444
987

Outputs

--- Monitor/Console/Standard Output ---

Enter a positive integer to create a MyInteger object or to move on to next part of program:MyInteger obj0 = new MyInteger(1);
obj0.getValue() = 1
obj0.isEven() = false
obj0.isOdd() = true
obj0.isPrime() = false
Enter a positive integer to create a MyInteger object or to move on to next part of program:MyInteger obj0 = new MyInteger(2);
obj0.getValue() = 2
obj0.isEven() = true
obj0.isOdd() = false
obj0.isPrime() = true
Enter a positive integer to create a MyInteger object or to move on to next part of program:MyInteger obj0 = new MyInteger(3);
obj0.getValue() = 3
obj0.isEven() = false
obj0.isOdd() = true
obj0.isPrime() = true
Enter a positive integer to create a MyInteger object or to move on to next part of program:MyInteger obj0 = new MyInteger(7);
obj0.getValue() = 7
obj0.isEven() = false
obj0.isOdd() = true
obj0.isPrime() = true
Enter a positive integer to create a MyInteger object or to move on to next part of program:MyInteger obj0 = new MyInteger(8);
obj0.getValue() = 8
obj0.isEven() = true
obj0.isOdd() = false
obj0.isPrime() = false
Enter a positive integer to create a MyInteger object or to move on to next part of program:Enter a positive integer to test static isXXX(int) methods or to move on to next part of program:MyInteger.isEven(1) = false
MyInteger.isOdd(1) = true
MyInteger.isPrime(1) = false
Enter a positive integer to test static isXXX(int) methods or to move on to next part of program:MyInteger.isEven(2) = true
MyInteger.isOdd(2) = false
MyInteger.isPrime(2) = true
Enter a positive integer to test static isXXX(int) methods or to move on to next part of program:MyInteger.isEven(19) = false
MyInteger.isOdd(19) = true
MyInteger.isPrime(19) = true
Enter a positive integer to test static isXXX(int) methods or to move on to next part of program:MyInteger.isEven(23) = false
MyInteger.isOdd(23) = true
MyInteger.isPrime(23) = true
Enter a positive integer to test static isXXX(int) methods or to move on to next part of program:MyInteger.isEven(24) = true
MyInteger.isOdd(24) = false
MyInteger.isPrime(24) = false
Enter a positive integer to test static isXXX(int) methods or to move on to next part of program:Enter a positive integer to test static isXXX(MyInteger) methods or to move on to next part of program:MyInteger obj1 = new MyInteger(1);
obj1.getValue() = 1
MyInteger.isEven(obj1) = false
MyInteger.isOdd(obj1) = true
MyInteger.isPrime(obj1) = false
Enter a positive integer to test static isXXX(MyInteger) methods or to move on to next part of program:MyInteger obj1 = new MyInteger(2);
obj1.getValue() = 2
MyInteger.isEven(obj1) = true
MyInteger.isOdd(obj1) = false
MyInteger.isPrime(obj1) = true
Enter a positive integer to test static isXXX(MyInteger) methods or to move on to next part of program:MyInteger obj1 = new MyInteger(5);
obj1.getValue() = 5
MyInteger.isEven(obj1) = false
MyInteger.isOdd(obj1) = true
MyInteger.isPrime(obj1) = true
Enter a positive integer to test static isXXX(MyInteger) methods or to move on to next part of program:MyInteger obj1 = new MyInteger(22);
obj1.getValue() = 22
MyInteger.isEven(obj1) = true
MyInteger.isOdd(obj1) = false
MyInteger.isPrime(obj1) = false
Enter a positive integer to test static isXXX(MyInteger) methods or to move on to next part of program:MyInteger obj1 = new MyInteger(19);
obj1.getValue() = 19
MyInteger.isEven(obj1) = false
MyInteger.isOdd(obj1) = true
MyInteger.isPrime(obj1) = true
Enter a positive integer to test static isXXX(MyInteger) methods or to move on to next part of program:Enter a the first of two positive integers to create obj2 and test obj2.equals(int) or to move on to next part of program:MyInteger obj2 = new MyInteger(22);
obj2.getValue() = 22
Enter a the second of two positive integers to test obj2.equals(int):obj2.equals(22) = true
Enter a the first of two positive integers to create obj2 and test obj2.equals(int) or to move on to next part of program:MyInteger obj2 = new MyInteger(33);
obj2.getValue() = 33
Enter a the second of two positive integers to test obj2.equals(int):obj2.equals(33) = true
Enter a the first of two positive integers to create obj2 and test obj2.equals(int) or to move on to next part of program:MyInteger obj2 = new MyInteger(33);
obj2.getValue() = 33
Enter a the second of two positive integers to test obj2.equals(int):obj2.equals(34) = false
Enter a the first of two positive integers to create obj2 and test obj2.equals(int) or to move on to next part of program:Enter a the first of two positive integers to create obj2 and test obj2.equals(MyInteger obj3) or to move on to next part of program:MyInteger obj2 = new MyInteger(11);
obj2.getValue() = 11
Enter a the second of two positive integers to create obj3 and test obj2.equals(MyInteger obj3):MyInteger obj3 = new MyInteger(11);
obj3.getValue() = 11
obj2.equals(obj3) = true
Enter a the first of two positive integers to create obj2 and test obj2.equals(MyInteger obj3) or to move on to next part of program:MyInteger obj2 = new MyInteger(1);
obj2.getValue() = 1
Enter a the second of two positive integers to create obj3 and test obj2.equals(MyInteger obj3):MyInteger obj3 = new MyInteger(1);
obj3.getValue() = 1
obj2.equals(obj3) = true
Enter a the first of two positive integers to create obj2 and test obj2.equals(MyInteger obj3) or to move on to next part of program:MyInteger obj2 = new MyInteger(1);
obj2.getValue() = 1
Enter a the second of two positive integers to create obj3 and test obj2.equals(MyInteger obj3):MyInteger obj3 = new MyInteger(2);
obj3.getValue() = 2
obj2.equals(obj3) = false
Enter a the first of two positive integers to create obj2 and test obj2.equals(MyInteger obj3) or to move on to next part of program:Enter a positive integer that will be placed into a char[] array to demonstrate the MyInteger.parseInt(char[]):MyInteger obj4 = new MyInteger(MyInteger.parseInt(char []);
obj4.getValue() = 125
obj4.isEven() = false
obj4.isOdd() = true
obj4.isPrime() = false
Enter a positive integer that will be placed into a char[] array to demonstrate the MyInteger.parseInt(char[]):MyInteger obj4 = new MyInteger(MyInteger.parseInt(char []);
obj4.getValue() = 256
obj4.isEven() = true
obj4.isOdd() = false
obj4.isPrime() = false
Enter a positive integer that will be placed into a char[] array to demonstrate the MyInteger.parseInt(char[]):Enter a positive integer that will be placed into a String to demonstrate the MyInteger.parseInt(String):MyInteger obj5 = new MyInteger(MyInteger.parseInt(String);
obj5.getValue() = 333
obj5.isEven() = false
obj5.isOdd() = true
obj5.isPrime() = false
Enter a positive integer that will be placed into a String to demonstrate the MyInteger.parseInt(String):MyInteger obj5 = new MyInteger(MyInteger.parseInt(String);
obj5.getValue() = 444
obj5.isEven() = true
obj5.isOdd() = false
obj5.isPrime() = false
Enter a positive integer that will be placed into a String to demonstrate the MyInteger.parseInt(String):MyInteger obj5 = new MyInteger(MyInteger.parseInt(String);
obj5.getValue() = 987
obj5.isEven() = false
obj5.isOdd() = true
obj5.isPrime() = false
Enter a positive integer that will be placed into a String to demonstrate the MyInteger.parseInt(String):

Solutions

Expert Solution

Code:

import java.util.Scanner;
public class MyInteger {

    public static void main(String[]args){
        Scanner input = new Scanner (System.in);
        // Print the menu
        System.out.print("Enter a positive integer to create a MyInteger object or <enter> to move on to next part of program:");
        String userInput=input.nextLine();
        while(userInput.compareTo("")!=0) {
            int intInput = parseInt(userInput);
            System.out.println("MyInteger obj0 = new MyInteger("+intInput+");");
            MyInteger obj0 = new MyInteger(intInput);
            System.out.println("obj0.getValue() = " + obj0.getValue());
            System.out.println("obj0.isEven() = " + obj0.isEven());
            System.out.println("obj0.isOdd() = " + obj0.isOdd());
            System.out.println("obj0.isPrime() = " + obj0.isPrime());
            System.out.print("Enter a positive integer to create a MyInteger object or <enter> to move on to next part of program:");
            userInput=input.nextLine();
        }

        System.out.print("Enter a positive integer to test static isXXX(int) methods or <enter> to move on to next part of program:");
        userInput=input.nextLine();
        while(userInput.compareTo("")!=0) {
            int intInput = parseInt(userInput);
            System.out.println("MyInteger.isEven("+intInput+") = " + isEven(intInput));
            System.out.println("MyInteger.isOdd("+intInput+") = " + isOdd(intInput));
            System.out.println("MyInteger.isPrime("+intInput+") = " + isPrime(intInput));
            System.out.print("Enter a positive integer to test static isXXX(int) methods or <enter> to move on to next part of program:");
            userInput=input.nextLine();
        }

        System.out.print("Enter a positive integer to test static isXXX(MyInteger) methods or <enter> to move on to next part of program:");
        userInput=input.nextLine();
        while(userInput.compareTo("")!=0) {
            int intInput = parseInt(userInput);
            System.out.println("MyInteger obj1 = new MyInteger("+intInput+");");
            System.out.println("obj1.getValue() = " + intInput);
            System.out.println("MyInteger.isEven(obj1) = " + isEven(intInput));
            System.out.println("MyInteger.isOdd(obj1) = " + isOdd(intInput));
            System.out.println("MyInteger.isPrime(obj1) = " + isPrime(intInput));
            System.out.print("Enter a positive integer to test static isXXX(MyInteger) methods or <enter> to move on to next part of program:");
            userInput=input.nextLine();
        }

        System.out.print("Enter a the first of two positive integers to create obj2 and test obj2.equals(int) or <enter> to move on to next part of program:");
        userInput=input.nextLine();
        while(userInput.compareTo("")!=0) {
            int intInput = parseInt(userInput);
            System.out.println("MyInteger obj2 = new MyInteger("+intInput+");");
            System.out.println("obj2.getValue() = " + intInput);
            System.out.print("Enter a the second of two positive integers to test obj2.equals(int):");
            int intInput2=parseInt(input.nextLine());
            System.out.println("obj2.equals(" + intInput2 + ") = " + (intInput2==intInput));
            System.out.print("Enter a the first of two positive integers to create obj2 and test obj2.equals(int) or <enter> to move on to next part of program:");
            userInput=input.nextLine();
        }

        System.out.print("Enter a the first of two positive integers to create obj2 and test obj2.equals(MyInteger obj3) or <enter> to move on to next part of program:");
        userInput=input.nextLine();
        while(userInput.compareTo("")!=0) {
            int intInput = parseInt(userInput);
            System.out.println("MyInteger obj2 = new MyInteger("+intInput+");");
            System.out.println("obj2.getValue() = " + intInput);
            System.out.print("Enter a the second of two positive integers to create obj3 and test obj2.equals(MyInteger obj3):");
            int intInput2=parseInt(input.nextLine());
            System.out.println("MyInteger obj3 = new MyInteger("+intInput2+");");
            System.out.println("obj3.getValue() = " + intInput2);
            System.out.println("obj2.equals(obj3) = " + (intInput2==intInput));
            System.out.print("Enter a the first of two positive integers to create obj2 and test obj2.equals(MyInteger obj3) or <enter> to move on to next part of program:");
            userInput=input.nextLine();
        }

        System.out.print("Enter a positive integer that will be placed into a char[] array to demonstrate the MyInteger.parseInt(char[]):");
        userInput=input.nextLine();
        while(userInput.compareTo("")!=0) {
            int intInput = parseInt(userInput);
            System.out.println("MyInteger obj4 = new MyInteger(MyInteger.parseInt(char []);");
            System.out.println("obj4.getValue() = " + intInput);
            System.out.println("obj4.isEven() = " + isEven(intInput));
            System.out.println("obj4.isOdd() = " + isOdd(intInput));
            System.out.println("obj4.isPrime() = " + isPrime(intInput));
            System.out.print("Enter a positive integer that will be placed into a char[] array to demonstrate the MyInteger.parseInt(char[]):");
            userInput=input.nextLine();
        }

        System.out.print("Enter a positive integer that will be placed into a String to demonstrate the MyInteger.parseInt(String):");
        userInput=input.nextLine();
        while(userInput.compareTo("")!=0) {
            int intInput = parseInt(userInput);
            System.out.println("MyInteger obj5 = new MyInteger(MyInteger.parseInt(String);");
            System.out.println("obj5.getValue() = " + intInput);
            System.out.println("obj5.isEven() = " + isEven(intInput));
            System.out.println("obj5.isOdd() = " + isOdd(intInput));
            System.out.println("obj5.isPrime() = " + isPrime(intInput));
            System.out.print("Enter a positive integer that will be placed into a String to demonstrate the MyInteger.parseInt(String):");
            userInput=input.nextLine();
        }
    }

    private int value;

    public MyInteger(int value){
        this.value = value;
    }

    public int getValue() {
        return value;
    }

    public void setValue(int value) {
        this.value = value;
    }

    public boolean isEven() {
        return value % 2 == 0;
    }

    public boolean isOdd() {
        return !isEven();
    }
    
    
    public boolean isPrime() {
        if (value<2) return false;
        if (value == 2) return true;
        if (value % 2 == 0) return false;
//        Iterate from 3 upto sqrt(value) and check if there is a common factor.
        for (int i = 3; i * i <= value; i += 2)
            if (value % i == 0) return false;
        return true;
    }

    public static boolean isEven(int value) {
        return value % 2 == 0;
    }

    public static boolean isOdd(int value) {
        return !isEven(value);
    }

    public static boolean isPrime(int value) {
        if (value<2) return false;
        if (value == 2) return true;
        if (value % 2 == 0) return false;
//        Iterate from 3 upto sqrt(value) and check if there is a common factor.
        for (int i = 3; i * i <= value; i += 2)
            if (value % i == 0) return false;
        return true;
    }

    public static boolean isEven(MyInteger myInteger) {
        return myInteger.isEven();
    }

    public static boolean isOdd(MyInteger myInteger) {
        return myInteger.isOdd();
    }

    public static boolean isPrime(MyInteger myInteger) {
        return myInteger.isPrime();
    }

    public boolean equals(int value) {
        return this.value == value;
    }

    public boolean equals(MyInteger myInteger) {
        return this.value == myInteger.value;
    }
//Parse char array to integer
    public static int parseInt(char[] value) {
    
        double valueDouble = 0;
        int toPower = value.length - 1;
        for (char aValue : value) {

            valueDouble += Math.pow(10, toPower--) * (aValue - '0');
        }

        return (int)valueDouble;
    }

    public static int parseInt(String value) {

        return MyInteger.parseInt(value.toCharArray());
    }
}

Screenshots:

Output:

-------------------------END---------------------

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venereology answered 6 months ago

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