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investmentCalculator.java
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investmentCalculator.java
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// PSEUDOCODE
/*
* This class
*/
package application;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.stage.Stage;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Line;
import javafx.scene.shape.Rectangle;
public class Main extends Application {
//Declare fields and buttons
TextField tfInvestmentAmount = new TextField();
TextField tfNumberOfYears = new TextField();
TextField tfAnnualInterestRate = new TextField();
TextField tfFutureValue = new TextField();
Button btCalculate = new Button("Calculate");
@Override
public void start(Stage primaryStage) {
//Create a grid pane
GridPane gridPane = new GridPane();
//Set horizontal and vertical gap
gridPane.setHgap(5);
gridPane.setVgap(5);
//Add labels and fields to the grid
gridPane.add(new Label("Investment Amount:"), 0, 0);
gridPane.add(tfInvestmentAmount, 1, 0);
gridPane.add(new Label("Number of Years:"), 0, 1);
gridPane.add(tfNumberOfYears, 1, 1);
gridPane.add(new Label("Annual Interest Rate:"), 0, 2);
gridPane.add(tfAnnualInterestRate, 1, 2);
gridPane.add(new Label("Future value:"), 0, 3);
gridPane.add(tfFutureValue, 1, 3);
gridPane.add(btCalculate, 1, 5);
//Set properties
gridPane.setAlignment(Pos.CENTER);
tfInvestmentAmount.setAlignment(Pos.BOTTOM_RIGHT);
tfNumberOfYears.setAlignment(Pos.BOTTOM_RIGHT);
tfAnnualInterestRate.setAlignment(Pos.BOTTOM_RIGHT);
tfFutureValue.setAlignment(Pos.BOTTOM_RIGHT);
tfFutureValue.setEditable(false);
GridPane.setHalignment(btCalculate, HPos.RIGHT);
//Create a handler to process events
//btCalculate.setOnAction(e -> calculateFutureValue());
btCalculate.setOnAction((ActionEvent e) -> {
calculateFutureValue();
});
//Create a scene and place it in the stage
Scene scene = new Scene(gridPane,300,200);
primaryStage.setTitle("Exercise15_05");
primaryStage.setScene(scene);
primaryStage.show();
}
private void calculateFutureValue() {
double investmentAmount = Double.parseDouble(tfInvestmentAmount.getText());
double interestRate = Double.parseDouble(tfAnnualInterestRate.getText());
int years = Integer.parseInt(tfNumberOfYears.getText());
//Calculate future value
double futureValue = investmentAmount * Math.pow((1 + interestRate/100),(years));
//Display future value
tfFutureValue.setText(String.format("$%.2f",futureValue));
System.out.println(investmentAmount);
System.out.println(years);
System.out.println(interestRate);
System.out.println(futureValue);
}