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Commitebfad91

Browse files
author
jsquared21
committed
Add Ex31_05
1 parent780e8d0 commitebfad91

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6 files changed

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6 files changed

+206
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importjava.io.*;
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importjava.net.*;
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importjava.util.Date;
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importjavafx.application.Application;
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importjavafx.scene.Scene;
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importjavafx.scene.control.TextArea;
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importjavafx.scene.control.Button;
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importjavafx.scene.control.ScrollPane;
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importjavafx.scene.control.Label;
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importjavafx.scene.control.TextField;
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importjavafx.scene.layout.GridPane;
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importjavafx.scene.layout.BorderPane;
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importjavafx.geometry.Pos;
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importjavafx.stage.Stage;
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publicclassExercise31_05ClientextendsApplication {
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// IO streams
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ObjectOutputStreamtoServer =null;
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DataInputStreamfromServer =null;
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// Text fields for loan info
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privateTextFieldtfAnnualInterestRate =newTextField();
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privateTextFieldtfNumberOfYears =newTextField();
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privateTextFieldtfLoanAmount =newTextField();
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// Button for submitting loan objet to server
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privateButtonbtSubmit =newButton("Submit");
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// Create text area
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privateTextAreata =newTextArea();
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@Override// Override the start method in the Application class
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publicvoidstart(StageprimaryStage) {
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// Set text fields alignment right
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tfAnnualInterestRate.setAlignment(Pos.BASELINE_RIGHT);
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tfNumberOfYears.setAlignment(Pos.BASELINE_RIGHT);
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tfLoanAmount.setAlignment(Pos.BASELINE_RIGHT);
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// Create a pane to hold loan infomation
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GridPanepaneForLoanInfo =newGridPane();
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paneForLoanInfo.add(newLabel("Annual Interest Rate"),0,0);
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paneForLoanInfo.add(tfAnnualInterestRate,1,0);
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paneForLoanInfo.add(newLabel("Number Of Years"),0,1);
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paneForLoanInfo.add(tfNumberOfYears,1,1);
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paneForLoanInfo.add(btSubmit,2,1);
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paneForLoanInfo.add(newLabel("Loan Amount"),0,2);
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paneForLoanInfo.add(tfLoanAmount,1,2);
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BorderPanepane =newBorderPane();
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pane.setTop(paneForLoanInfo);
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pane.setCenter(newScrollPane(ta));
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// Create a scene and place it in the stage
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Scenescene =newScene(pane,355,200);
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primaryStage.setTitle("Exercise31_05Client");// Set the stage title
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primaryStage.setScene(scene);// Place the scene in the stage
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primaryStage.show();// Display the stage
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btSubmit.setOnAction(e -> {
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try {
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// Get loan info from text fields and create a loan object
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Loanloan =newLoan(
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Double.parseDouble(tfAnnualInterestRate.getText().trim()),
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Integer.parseInt(tfNumberOfYears.getText().trim()),
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Double.parseDouble(tfLoanAmount.getText().trim()));
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// Send the loan object to the server
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toServer.writeObject(loan);
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toServer.flush();
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// Get monthly payment and total payment from the server
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doublemonthlyPayment =fromServer.readDouble();
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doubletotalPayment =fromServer.readDouble();
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// Display to text area
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ta.appendText("Annual Interest Rate: " +
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loan.getAnnualInterestRate() +'\n');
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ta.appendText("Number Of Years: " +loan.getNumberOfYears() +'\n');
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ta.appendText("Loan Amount: " +loan.getLoanAmount() +'\n');
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ta.appendText("monthlyPayment: " +monthlyPayment +'\n');
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ta.appendText("totalPayment: " +totalPayment +'\n');
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}
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catch (IOExceptionex) {
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System.err.println(ex);
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}
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});
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try {
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// Create a socket to connect to the server
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Socketsocket =newSocket("localhost",8000);
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// Create an input stream to receive data from the server
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fromServer =newDataInputStream(socket.getInputStream());
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// Create an output stream to send objects to the server
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toServer =newObjectOutputStream(socket.getOutputStream());
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}
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catch (IOExceptionex) {
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ta.appendText(ex.toString() +'\n');
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}
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}
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}
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importjava.io.*;
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importjava.net.*;
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importjava.util.Date;
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importjavafx.application.Application;
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importjavafx.application.Platform;
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importjavafx.scene.Scene;
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importjavafx.scene.control.ScrollPane;
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importjavafx.scene.control.TextArea;
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importjavafx.stage.Stage;
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publicclassExercise31_05ServerextendsApplication {
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@Override// Override the start method in the Application class
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publicvoidstart(StageprimaryStage) {
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// Text area for displaying contents
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TextAreata =newTextArea();
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// Create a scene and place it in the stage
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Scenescene =newScene(newScrollPane(ta),400,200);
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primaryStage.setTitle("Exercise31_05Server");// Set the stage title
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primaryStage.setScene(scene);// Place the scene in the stage
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primaryStage.show();// Display the stage
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newThread(() -> {
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try {
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// Create a server socket
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ServerSocketserverSocket =newServerSocket(8000);
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Platform.runLater(() ->
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ta.appendText("Exercise31_05Server started at "
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+newDate() +'\n'));
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// Listen for a connection request
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Socketsocket =serverSocket.accept();
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// Create object input stream
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ObjectInputStreaminputFromClient =newObjectInputStream(
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socket.getInputStream());
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// Create data output stream
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DataOutputStreamoutputToClient =newDataOutputStream(
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socket.getOutputStream());
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while (true) {
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Datedate =newDate();
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// Receive loan object from client
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Loanloan = (Loan)inputFromClient.readObject();
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// Compute monthly payment and total payment
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doublemonthlyInterestRate =loan.getAnnualInterestRate() /1200;
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doublemonthlyPayment =loan.getLoanAmount() *monthlyInterestRate
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/ (1 -1 /Math.pow(1 +monthlyInterestRate,
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loan.getNumberOfYears() *12));
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doubletotalPayment =monthlyPayment *
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loan.getNumberOfYears() *12;
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// send monthly payment and total payment back to the client
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outputToClient.writeDouble(monthlyPayment);
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outputToClient.writeDouble(totalPayment);
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Platform.runLater(() -> {
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ta.appendText("Connected to a client at " +date +'\n');
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ta.appendText("Annual interest Rate: " +
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loan.getAnnualInterestRate() +'\n');
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ta.appendText("Number Of Years: " +
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loan.getNumberOfYears() +'\n');
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ta.appendText("Loan Amount: " +loan.getLoanAmount() +'\n');
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ta.appendText("monthlyPayment: " +monthlyPayment +'\n');
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ta.appendText("totalPayment: " +totalPayment +'\n');
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});
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}
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}
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catch (IOExceptionex) {
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ex.printStackTrace();
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}
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catch (ClassNotFoundExceptionex) {
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ex.printStackTrace();
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}
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}).start();
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}
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}

‎Exercise_31/Exercise_31_05/Loan.class

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‎Exercise_31/Exercise_31_05/Loan.java

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publicclassLoanimplementsjava.io.Serializable {
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privatedoubleannualInterestRate;
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privateintnumberOfYears;
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privatedoubleloanAmount;
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publicLoan(doubleannualInterestRate,intnumberOfYears,doubleloanAmount) {
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this.annualInterestRate =annualInterestRate;
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this.numberOfYears =numberOfYears;
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this.loanAmount =loanAmount;
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}
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publicdoublegetAnnualInterestRate() {
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returnannualInterestRate;
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}
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publicintgetNumberOfYears() {
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returnnumberOfYears;
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}
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publicdoublegetLoanAmount() {
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returnloanAmount;
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}
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}

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