Complex.java

/*
 * Name: Janan Patel
 * Date: 2/18/2021
 * Course Number: CSC-112-D01
 * Course Name: Computer Science
 * Problem Number: 3
 * Email: jkpatel2001@student.stcc.edu
 * Short Description of the Problem: Complex numbers
 */

public class Complex {
	private double real;

	public double getReal() {
		return real;
	}

	public void setReal(double real) {
		this.real = real;
	}

	public double getImag() {
		return imag;
	}

	public void setImag(double imag) {
		this.imag = imag;
	}

	private double imag;

	public Complex(double real, double imag) {

		this.real = real;
		this.imag = imag;

	}

	public Complex(double real) {

		this.real = real;
		this.imag = 0;

	}

	public Complex() {

		this.real = 0;
		this.imag = 0;

	}

	public Complex add(Complex c2) {

		double real = this.real + c2.real;
		double imag = this.imag + c2.imag;

		return new Complex(real, imag);

	}

	public Complex subtract(Complex c2) {
		Complex a = this;

		return a.add(c2.negate());
	}

	public Complex multiply(Complex c2) {

		double real = (this.real * c2.real) - (this.imag * c2.imag);
		double imag = (this.real * c2.imag) + (this.imag * c2.real);

		return new Complex(real, imag);

	}

	public Complex divide(Complex c2) {

		double real = ((this.real * c2.real) + (this.imag * c2.imag)) / ((c2.real * c2.real) + (c2.imag * c2.imag));
		double imag = ((this.imag * c2.real) - (this.real * c2.imag)) / ((c2.real * c2.real) + (c2.imag * c2.imag));

		return new Complex(real, imag);

	}

	public double abs() {

		double absolutevalue = Math.sqrt((this.real * this.real) + (this.imag * this.imag));

		return absolutevalue;

	}

	public Complex negate() {

		return new Complex(-this.real, -this.imag);

	}

	public Complex conjugate() {

		return new Complex(this.real, -this.imag);

	}

	public double distance(Complex c2) {

		double distance = Math.sqrt(
				((this.real - c2.real) * (this.real - c2.real)) + ((this.imag - c2.imag) * (this.imag - c2.imag)));
		return distance;

	}

	public boolean equals(Complex c2) {

		boolean x = Math.abs(this.distance(c2) / Math.max(this.abs(), c2.abs())) < 1E-6;
		if (x == true) {
			return true;
		} else
			return false;

	}

	public boolean greaterThan(Complex c2) {
		boolean isOrisnt;
		if (this.abs() > c2.abs()) {
			isOrisnt = true;
		} else
			isOrisnt = false;
		return isOrisnt;

	}

	public boolean lessThan(Complex c2) {

		boolean isOrisnt;
		if (this.abs() < c2.abs()) {
			isOrisnt = true;
		} else
			isOrisnt = false;
		return isOrisnt;
	}

	public String toString() {

		return this.real + " + (" + this.imag + " i)";

	}

}

ComplexGUI.java

/*
 * Name: Janan Patel
 * Date: 2/18/2021
 * Course Number: CSC-112-D01
 * Course Name: Computer Science
 * Problem Number: 4
 * Email: jkpatel2001@student.stcc.edu
 * Short Description of the Problem: Complex numbers/GUI
 */

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class ComplexGUI extends Application {
	private static final int APPWIDTH = 1150;
	private static final int APPHEIGHT = 220;

	private TextField tfAReal;
	private TextField tfAImag;
	private TextField tfBReal2nd;
	private TextField tfBImag2nd;

	private ComboBox<String> operation;
	private TextField tfCReal3rd;
	private TextField tfCImag3rd;
	private Label Comp;
	private Label ConjA;
	private Label ConjB;
	private Label I;
	private Label I2;
	private Label I3;
	private Button btnCalculate;

	private void doCalculation() {
		try {
			double real = Double.parseDouble(this.tfAReal.getText());
			double imag = Double.parseDouble(this.tfAImag.getText());

			Complex a = new Complex(real, imag);

			real = Double.parseDouble(this.tfBReal2nd.getText());
			imag = Double.parseDouble(this.tfBImag2nd.getText());

			Complex b = new Complex(real, imag);

			String operator = this.operation.getValue();

			var c = new Complex();
			switch (operator) {
			case "+":
				c = a.add(b);
				break;
			case "-":
				c = a.subtract(b);
				break;
			case "/":
				c = a.divide(b);
				break;
			case "*":
				c = a.multiply(b);
				break;
			}

			this.tfCReal3rd.setText(String.valueOf(c.getReal()));
			this.tfCImag3rd.setText(String.valueOf(c.getImag()));

			String comparison;

			if (a.lessThan(b))
				comparison = "A < B";
			else if (a.greaterThan(b))
				comparison = "A > B";
			else
				comparison = "A == B";
			this.Comp.setText("< or >: " + comparison);

			Complex conjugation = a.conjugate();
			this.ConjA.setText("Conjugation of A: " + conjugation);
			conjugation = b.conjugate();
			this.ConjB.setText("Conjugation of B: " + conjugation);

		} catch (Exception ex) {
			this.tfCReal3rd.setText("ERROR");
			this.tfCImag3rd.setText("ERROR");

		}

	}

	private BorderPane setupGUI() {
		final String COMPONENTSTYLE = "-fx-font-weight: bold; -fx-font-size: 12pt";

		this.tfAReal = new TextField();
		this.tfAReal.setPrefWidth(75);
		this.tfAImag = new TextField();
		this.tfAImag.setPrefWidth(75);
		this.I = new Label("i");

		this.tfBReal2nd = new TextField();
		this.tfBReal2nd.setPrefWidth(75);
		this.tfBImag2nd = new TextField();
		this.tfBImag2nd.setPrefWidth(75);
		this.I2 = new Label("i");

		this.tfCReal3rd = new TextField();
		this.tfCReal3rd.setPrefWidth(75);
		this.tfCImag3rd = new TextField();
		this.tfCImag3rd.setPrefWidth(75);
		this.I3 = new Label("i");

		Label lblA = new Label("A");
		Label lblB = new Label("B");
		Label lblC = new Label("C");

		this.operation = new ComboBox<String>();
		this.operation.setStyle(COMPONENTSTYLE);
		String[] ComboBox = { "+", "-", "*", "/" };
		this.operation.getItems().addAll(ComboBox);
		this.operation.setValue(ComboBox[0]);

		this.btnCalculate = new Button(" = ");
		btnCalculate.setOnAction(e -> doCalculation());
		
		// HBOXES

		HBox hb1 = new HBox();
		hb1.setPrefWidth(200);
		hb1.setSpacing(15);
		Label plus = new Label("+");
		plus.setStyle(COMPONENTSTYLE);
		hb1.getChildren().addAll(tfAReal, plus, tfAImag);

		HBox hb2 = new HBox();
		hb2.setPrefWidth(200);
		hb2.setSpacing(15);
		Label plus2nd = new Label("+");
		plus2nd.setStyle(COMPONENTSTYLE);
		hb2.getChildren().addAll(tfBReal2nd, plus2nd, tfBImag2nd);

		HBox Ans = new HBox();
		Ans.setPrefWidth(200);
		Ans.setSpacing(15);
		Label plus3rd = new Label("+");
		plus3rd.setStyle(COMPONENTSTYLE);
		Ans.getChildren().addAll(tfCReal3rd, plus3rd, tfCImag3rd);

		FlowPane centerPane = new FlowPane(20, 10);
		centerPane.setAlignment(Pos.TOP_CENTER);
		centerPane.setPadding(new Insets(5));
		Label lblInstructions = new Label(
				"Enter the Real and Imaginery parts and click the equal button for an answer: ");
		lblInstructions.setPrefWidth(APPWIDTH);
		lblInstructions.setAlignment(Pos.CENTER);
		centerPane.getChildren().addAll(lblInstructions, lblA, hb1, I, this.operation, lblB, hb2, I2, this.btnCalculate,
				lblC, Ans, I3);

		this.Comp = new Label();
		this.Comp.setStyle(COMPONENTSTYLE);
		this.Comp.setPrefWidth((APPWIDTH - 50));
		centerPane.getChildren().add(this.Comp);

		this.ConjA = new Label();
		this.ConjA.setStyle(COMPONENTSTYLE);
		this.ConjA.setPrefWidth((APPWIDTH - 50));
		centerPane.getChildren().add(this.ConjA);

		this.ConjB = new Label();
		this.ConjB.setStyle(COMPONENTSTYLE);
		this.ConjB.setPrefWidth((APPWIDTH - 50));
		centerPane.getChildren().add(this.ConjB);

		Label Name = new Label("Complex GUI by Janan Patel");
		FlowPane bpane = new FlowPane(5, 5);
		bpane.setAlignment(Pos.BOTTOM_RIGHT);
		bpane.setPadding(new Insets(10));
		bpane.setStyle(COMPONENTSTYLE);
		bpane.getChildren().addAll(Name);

		BorderPane bp = new BorderPane();
		bp.setCenter(centerPane);
		bp.setBottom(bpane);
		bp.setStyle(COMPONENTSTYLE);
		return bp;
	}

	/**
	 * The main method is only needed for the IDE with limited JavaFX support. Not
	 * needed for running from the command line.
	 */
	public static void main(String[] args) {
		launch(args);
	}

	@Override
	public void start(Stage primaryStage) {
		BorderPane bp = setupGUI();

		Scene scene = new Scene(bp, APPWIDTH, APPHEIGHT);
		primaryStage.setTitle("Complex GUI App");
		primaryStage.setScene(scene);
		primaryStage.show();
		primaryStage.setResizable(false);
	}

}