I have Majority of the code written but I just need to implement the <,>,and = sign in the code. I have posted the instructions for the whole code. I will add what I have at the end.
Objectives:
-
Implement basic class concepts in Java
-
Implement inheritance with super and sub-classes
-
Implement basic polymorphism concepts
Problem: The TARDIS has been infected by a virus which means it is up to Doctor Who to manually enter calculations into the TARDIS interface. The calculations necessary to make the TARDIS work properly involve real, imaginary and complex numbers. The Doctor has asked you to create a program that will evaluate numerical expressions so that he can quickly enter the information into the TARDIS.
Details:
• Classes
o Number class – Number.java
▪ Attributes
• Real number (double)
▪ Methods
-
Default constructor
-
Overloaded constructor – pass in value for number• Accessor
• Mutator
• toString
• equals
o Complex number class – Complex.java
▪ Extends number class (-5 points if not)▪ Attributes:
• Imaginary number (double)▪ Methods
-
Default constructor
-
Overloaded Constructor – pass in real and imaginary numbers
o Call super constructor
-
Accessor
-
Mutator
-
toString
-
equals
-
Read in the entire expression as a string and parse it into the proper objectso Store each part of the in the correct attribute of the object
-
Use the toString function to display the number when necessary
-
Both the real and imaginary parts may be floating point values
-
Validate that each expression contains no invalid characters
o The only valid letter in a complex number is i (lower case)
o Check that each expression contains a valid operator
• Each number in the expression must be stored in the appropriate
object
o Real numbers are not to be stored in a complex object
-
If a line contains invalid data, ignore the line
-
Numbers may be represented in 3 ways
o Complex (real + imaginary)
▪ <number><+ or -><number>i
o Real only
▪ <number>
o Imaginary only
▪ <number>i
-
Numbers may be positive or negative
-
Results for arithmetic operators will be numerical
-
Results for relational operators will be Boolean
-
Calculating less/greater than of a complex or imaginary number will be determined by analyzing
the magnitude of each complex number
-
All functions in Main.java that would normally require a real or complex number parameter object must use Object parameters instead (-10 points)
o Use the instanceof operator to determine the type of object and perform the proper actions based on the object type
User Interface: There will be no user interface for this program. All I/O will be performed with a filesInput:
-
Prompt the user for the name of the file containing the numerical expressions
-
Each line in the file will contain an expression to be evaluated
-
Valid line format: <number><space><operator><space><number>
o <number> can be real or complex
-
Valid operators
o + (add)
o – (subtract)
o * (multiply)
o / (divide)
o < (less than)
o > (greater than)o = (equal)
• There will be a newline at the end of each line except for the last line (which may or may not have a newline)
Output:
-
All output will be written to a file named results.txt.
-
Output format:
o <expression><tab><value> -
Numerical values will be rounded to 2 decimal places.
-
Relational operators will evaluate to true or false
-
Each expression will be listed on separate lines
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Main:
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Main{
static PrintWriter output;
public static void main(String[] args)throws FileNotFoundException
{
output = new PrintWriter("results.txt");
Scanner in = new Scanner(System.in);
String file=in.nextLine();
FileReader fr;
try {
fr = new FileReader(file);
Scanner sc=new Scanner(fr);
while(sc.hasNextLine()){
String line=sc.nextLine();
pareseString(line);
//pareseString(line);
}
}
catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
pareseString("6 * 3+2i");
pareseString("2 - 3");
output.close();
}
//This is the add method, taking object c2 as parameter, and adding it to .this to return
public static Complex add(Complex c1, Complex c2) {
return new Complex(c1.getRealNumber() + c2.getRealNumber(), c1.getImaginaryNumber() + c2.getImaginaryNumber());
}
//Now the subtract method, followed by the methods to multiply and divide according to hand-out rules.
public static Complex substract(Complex c1, Complex c2) {
return new Complex(c1.getRealNumber() - c2.getRealNumber(), c1.getImaginaryNumber() - c2.getImaginaryNumber());
}
public static Complex multiply(Complex c1,Complex c2) {
Complex c3 = new Complex();
c3.setRealNumber( c1.getRealNumber() * c2.getRealNumber() - c1.getImaginaryNumber() * c2.getImaginaryNumber());
c3.setImaginaryNumber( c1.getRealNumber() * c2.getImaginaryNumber() - c1.getImaginaryNumber() * c2.getRealNumber());;
return c3;
}
public static Complex divide(Complex c1,Complex c2) {
Complex c3 = new Complex();
c3.setRealNumber( c1.getRealNumber() / c2.getRealNumber() - c1.getImaginaryNumber() / c2.getImaginaryNumber());
c3.setImaginaryNumber( c1.getRealNumber() / c2.getImaginaryNumber() - c1.getImaginaryNumber() / c2.getRealNumber());;
return c3;
}
public static void pareseString(String line){
String [] strArr=line.split(" ");
String cn1=strArr[0];
String operation=strArr[1];
String cn2=strArr[2];
Complex c1=validation(cn1);
Complex c2=validation(cn2);
if(c1!=null && c2!=null){
switch (operation) {
case "+":
output.println(add(c1, c2));
break;
case "-":
output.println(substract(c1, c2));
break;
case "*":
output.println(multiply(c1, c2));
break;
case "/":
output.println(divide(c1, c2));
break;
}
}
}
private static Complex validation(String comp) {
String numberNoWhiteSpace = comp.replaceAll("\\s","");
// Matches complex number with BOTH real AND imaginary parts.
Pattern patternA = Pattern.compile("([-]?[0-9]+\\.?[0-9]?)([-|+]+[0-9]+\\.?[0-9]?)[i$]+");
// Matches ONLY real number.
Pattern patternB = Pattern.compile("([-]?[0-9]+\\.?[0-9]?)$");
// Matches ONLY imaginary number.
Pattern patternC = Pattern.compile("([-]?[0-9]+\\.?[0-9]?)[i$]");
Matcher matcherA = patternA.matcher(numberNoWhiteSpace);
Matcher matcherB = patternB.matcher(numberNoWhiteSpace);
Matcher matcherC = patternC.matcher(numberNoWhiteSpace);
double realNumber=0.0;
double imaginaryNumber=0.0;
Complex cn=null;
if (matcherA.find()) {
realNumber = Double.parseDouble(matcherA.group(1));
imaginaryNumber = Double.parseDouble(matcherA.group(2));
cn=new Complex(realNumber, imaginaryNumber);
}
else if (matcherB.find()) {
realNumber = Double.parseDouble(matcherB.group(1));
imaginaryNumber = 0;
cn=new Complex(realNumber, imaginaryNumber);
}
else if (matcherC.find()) {
realNumber = 0;
imaginaryNumber = Double.parseDouble(matcherC.group(1));
cn=new Complex(realNumber, imaginaryNumber);
}
return cn;
}
}
-----------------
Numbers class
class Number{
private double realNumber;
public Number(double realNumber) {
this.realNumber = realNumber;
}
public Number() {
this.realNumber = realNumber;
}
public double getRealNumber() {
return realNumber;
}
public void setRealNumber(double realNumnber) {
this.realNumber = realNumnber;
}
@Override
public String toString() {
// TODO Auto-generated method stub
return this.getRealNumber()+"";
}
@Override
public boolean equals(Object obj) {
//TODO Auto-generated method stub
if(obj instanceof Number){
Number cn=(Number)obj;
return this.getRealNumber()==cn.getRealNumber();
}
return false;
}
}
-------------------------------------------------------------
Complex Class
class Complex extends Number{
public double getImaginaryNumber() {
return imaginaryNumber;
}
public void setImaginaryNumber(double imaginaryNumber) {
this.imaginaryNumber = imaginaryNumber;
}
double imaginaryNumber;
public Complex(double realNumnber,double imaginaryNumber) {
super(realNumnber);
this.imaginaryNumber=imaginaryNumber;
// TODO Auto-generated constructor stub
}
public Complex() {
super();
}
@Override
public String toString() {
// TODO Auto-generated method stub
return String.format("%.2f", this.getRealNumber())+"+"+String.format("%.2f",this.getImaginaryNumber())+"i";
}
@Override
public boolean equals(Object obj){
// TODO Auto-generated method stub
if(obj instanceof Complex){
Complex cn=(Complex)obj;
return this.getRealNumber()==cn.getRealNumber() && cn.getImaginaryNumber()==this.getImaginaryNumber();
}
return false;
}
}
Homework Answers
Solution)=>
Please find the answer below. Hope you will like this answer.
private static String Equality(Complex c1, Complex c2) {
// TODO Auto-generated method stub
String response ="";
if(c1.equals(c2)){
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is Equal to "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}else {
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is not Equal to "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}
return response;
}
// To implement this method first i will check real part if they
are equal then i will go check imaginary one else not.
private static String greaterThan(Complex c1, Complex c2) {
// TODO Auto-generated method stub4
// TODO Auto-generated method stub
String response ="";
if(c1.getRealNumber()>= c2.getRealNumber()){
if( c1.getRealNumber()==
c2.getRealNumber()) {
if(
c1.getImaginaryNumber() > c2.getImaginaryNumber()) {
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is greater Than "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}else{
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is not greater Than "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}
}else {
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is greater Than "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}
}else {
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is not Greater Than "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}
return response;
}
private static String lessThan(Complex c1, Complex c2) {
// TODO Auto-generated method stub
String response ="";
if(c1.getRealNumber()<= c2.getRealNumber()){
if( c1.getRealNumber() ==
c2.getRealNumber()) {
if(
c1.getImaginaryNumber() < c2.getImaginaryNumber()) {
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is Less Than "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}else{
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is not Less Than "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}
}else {
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is Less Than "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}
}else {
response=String.format("%.2f",
c1.getRealNumber())+"+"+String.format("%.2f",c1.getImaginaryNumber())+"i"
+" is not Less Than "+String.format("%.2f",
c2.getRealNumber())+"+"+String.format("%.2f",c2.getImaginaryNumber());
}
return response;
}
Need to add these line in switch case:-
case "<":
output.println(lessThan(c1, c2));
break;
case ">":
output.println(greaterThan(c1, c2));
break;
case "=":
output.println(Equality(c1, c2));
break;
Hi,
I have implemented three methods, less than(<), greater than(>) and equals. as given in the question, the less/greater than of a complex or imaginary number will be determined by analyzing the magnitude of each complex number.
****************************************************************
Main.java
****************************************************************
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Main {
static PrintWriter output;
public static void main(String[] args) throws FileNotFoundException
{
output = new PrintWriter("results.txt");
Scanner in = new Scanner(System.in);
String file = in.nextLine();
FileReader fr;
try {
fr = new FileReader(file);
Scanner sc = new Scanner(fr);
while (sc.hasNextLine()) {
String line = sc.nextLine();
pareseString(line);
// pareseString(line);
}
}
catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
pareseString("6 * 3+2i");
pareseString("2 - 3");
output.close();
}
// This is the add method, taking object c2 as
parameter, and adding it to .this
// to return
public static Complex add(Complex c1, Complex c2) {
return new Complex(c1.getRealNumber() + c2.getRealNumber(), c1.getImaginaryNumber() + c2.getImaginaryNumber());
}
// Now the subtract method, followed by the methods
to multiply and divide
// according to hand-out rules.
public static Complex substract(Complex c1, Complex c2) {
return new Complex(c1.getRealNumber() - c2.getRealNumber(), c1.getImaginaryNumber() - c2.getImaginaryNumber());
}
public static Complex multiply(Complex c1, Complex c2) {
Complex c3 = new Complex();
c3.setRealNumber(c1.getRealNumber() * c2.getRealNumber() - c1.getImaginaryNumber() * c2.getImaginaryNumber());
c3.setImaginaryNumber(
c1.getRealNumber() * c2.getImaginaryNumber() -
c1.getImaginaryNumber() * c2.getRealNumber());
;
return c3;
}
public static Complex divide(Complex c1, Complex c2) {
Complex c3 = new Complex();
c3.setRealNumber(c1.getRealNumber() / c2.getRealNumber() - c1.getImaginaryNumber() / c2.getImaginaryNumber());
c3.setImaginaryNumber(
c1.getRealNumber() / c2.getImaginaryNumber() -
c1.getImaginaryNumber() / c2.getRealNumber());
;
return c3;
}
public static Boolean lessThan(Complex c1, Complex
c2) {
double magC1 =
Math.sqrt(Math.pow(c1.getRealNumber(), 2) +
Math.pow(c1.getImaginaryNumber(), 2));
double magC2 =
Math.sqrt(Math.pow(c2.getRealNumber(), 2) +
Math.pow(c2.getImaginaryNumber(), 2));
if (magC1 < magC2)
return
true;
else
return
false;
}
public static Boolean greaterThan(Complex c1,
Complex c2) {
double magC1 =
Math.sqrt(Math.pow(c1.getRealNumber(), 2) +
Math.pow(c1.getImaginaryNumber(), 2));
double magC2 =
Math.sqrt(Math.pow(c2.getRealNumber(), 2) +
Math.pow(c2.getImaginaryNumber(), 2));
if (magC1 > magC2)
return
true;
else
return
false;
}
public static Boolean equal(Complex c1, Complex c2)
{
return c1.equals(c2);
}
public static void pareseString(String line) {
String[] strArr = line.split(" ");
String cn1 = strArr[0];
String operation = strArr[1];
String cn2 = strArr[2];
Complex c1 = validation(cn1);
Complex c2 = validation(cn2);
if (c1 != null && c2 != null) {
switch (operation) {
case "+":
output.println(add(c1, c2));
break;
case "-":
output.println(substract(c1, c2));
break;
case "*":
output.println(multiply(c1, c2));
break;
case "/":
output.println(divide(c1, c2));
break;
case "<":
output.println(lessThan(c1, c2));
break;
case ">":
output.println(greaterThan(c1, c2));
break;
case "=":
output.println(equal(c1, c2));
break;
}
}
}
private static Complex validation(String comp) {
String numberNoWhiteSpace = comp.replaceAll("\\s", "");
// Matches complex number with BOTH real AND imaginary parts.
Pattern patternA = Pattern.compile("([-]?[0-9]+\\.?[0-9]?)([-|+]+[0-9]+\\.?[0-9]?)[i$]+");
// Matches ONLY real number.
Pattern patternB = Pattern.compile("([-]?[0-9]+\\.?[0-9]?)$");
// Matches ONLY imaginary number.
Pattern patternC = Pattern.compile("([-]?[0-9]+\\.?[0-9]?)[i$]");
Matcher matcherA = patternA.matcher(numberNoWhiteSpace);
Matcher matcherB = patternB.matcher(numberNoWhiteSpace);
Matcher matcherC = patternC.matcher(numberNoWhiteSpace);
double realNumber = 0.0;
double imaginaryNumber = 0.0;
Complex cn = null;
if (matcherA.find()) {
realNumber = Double.parseDouble(matcherA.group(1));
imaginaryNumber = Double.parseDouble(matcherA.group(2));
cn = new Complex(realNumber, imaginaryNumber);
}
else if (matcherB.find()) {
realNumber = Double.parseDouble(matcherB.group(1));
imaginaryNumber = 0;
cn = new Complex(realNumber, imaginaryNumber);
}
else if (matcherC.find()) {
realNumber = 0;
imaginaryNumber = Double.parseDouble(matcherC.group(1));
cn = new Complex(realNumber, imaginaryNumber);
}
return cn;
}
}
Add Answer to:
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A complex number is a number in the form a + bi, where a and b
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You can perform addition, subtraction, multiplication, and division
for complex numbers using the following formulas:
a + bi + c + di = (a + c) + (b + d)i
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