Skip to content

Commit ebfad91

Browse files
author
jsquared21
committed
Add Ex31_05
1 parent 780e8d0 commit ebfad91

File tree

6 files changed

+206
-0
lines changed

6 files changed

+206
-0
lines changed

‎Exercise_31/Exercise_31_05/Exercise31_05Client.class‎

4.26 KB
Binary file not shown.

‎Exercise_31/Exercise_31_05/Exercise31_05Client.java‎

Lines changed: 102 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,102 @@
1+
import java.io.*;
2+
import java.net.*;
3+
import java.util.Date;
4+
import javafx.application.Application;
5+
import javafx.scene.Scene;
6+
import javafx.scene.control.TextArea;
7+
import javafx.scene.control.Button;
8+
import javafx.scene.control.ScrollPane;
9+
import javafx.scene.control.Label;
10+
import javafx.scene.control.TextField;
11+
import javafx.scene.layout.GridPane;
12+
import javafx.scene.layout.BorderPane;
13+
import javafx.geometry.Pos;
14+
import javafx.stage.Stage;
15+
16+
public class Exercise31_05Client extends Application {
17+
// IO streams
18+
ObjectOutputStream toServer = null;
19+
DataInputStream fromServer = null;
20+
21+
// Text fields for loan info
22+
private TextField tfAnnualInterestRate = new TextField();
23+
private TextField tfNumberOfYears = new TextField();
24+
private TextField tfLoanAmount = new TextField();
25+
26+
// Button for submitting loan objet to server
27+
private Button btSubmit = new Button("Submit");
28+
29+
// Create text area
30+
private TextArea ta = new TextArea();
31+
32+
@Override // Override the start method in the Application class
33+
public void start(Stage primaryStage) {
34+
// Set text fields alignment right
35+
tfAnnualInterestRate.setAlignment(Pos.BASELINE_RIGHT);
36+
tfNumberOfYears.setAlignment(Pos.BASELINE_RIGHT);
37+
tfLoanAmount.setAlignment(Pos.BASELINE_RIGHT);
38+
39+
// Create a pane to hold loan infomation
40+
GridPane paneForLoanInfo = new GridPane();
41+
paneForLoanInfo.add(new Label("Annual Interest Rate"), 0, 0);
42+
paneForLoanInfo.add(tfAnnualInterestRate, 1, 0);
43+
paneForLoanInfo.add(new Label("Number Of Years"), 0, 1);
44+
paneForLoanInfo.add(tfNumberOfYears, 1, 1);
45+
paneForLoanInfo.add(btSubmit, 2, 1);
46+
paneForLoanInfo.add(new Label("Loan Amount"), 0, 2);
47+
paneForLoanInfo.add(tfLoanAmount, 1, 2);
48+
49+
BorderPane pane = new BorderPane();
50+
pane.setTop(paneForLoanInfo);
51+
pane.setCenter(new ScrollPane(ta));
52+
53+
// Create a scene and place it in the stage
54+
Scene scene = new Scene(pane, 355, 200);
55+
primaryStage.setTitle("Exercise31_05Client"); // Set the stage title
56+
primaryStage.setScene(scene); // Place the scene in the stage
57+
primaryStage.show(); // Display the stage
58+
59+
btSubmit.setOnAction(e -> {
60+
try {
61+
// Get loan info from text fields and create a loan object
62+
Loan loan = new Loan(
63+
Double.parseDouble(tfAnnualInterestRate.getText().trim()),
64+
Integer.parseInt(tfNumberOfYears.getText().trim()),
65+
Double.parseDouble(tfLoanAmount.getText().trim()));
66+
67+
// Send the loan object to the server
68+
toServer.writeObject(loan);
69+
toServer.flush();
70+
71+
// Get monthly payment and total payment from the server
72+
double monthlyPayment = fromServer.readDouble();
73+
double totalPayment = fromServer.readDouble();
74+
75+
// Display to text area
76+
ta.appendText("Annual Interest Rate: " +
77+
loan.getAnnualInterestRate() + '\n');
78+
ta.appendText("Number Of Years: " + loan.getNumberOfYears() + '\n');
79+
ta.appendText("Loan Amount: " + loan.getLoanAmount() + '\n');
80+
ta.appendText("monthlyPayment: " + monthlyPayment + '\n');
81+
ta.appendText("totalPayment: " + totalPayment + '\n');
82+
}
83+
catch (IOException ex) {
84+
System.err.println(ex);
85+
}
86+
});
87+
88+
try {
89+
// Create a socket to connect to the server
90+
Socket socket = new Socket("localhost", 8000);
91+
92+
// Create an input stream to receive data from the server
93+
fromServer = new DataInputStream(socket.getInputStream());
94+
95+
// Create an output stream to send objects to the server
96+
toServer = new ObjectOutputStream(socket.getOutputStream());
97+
}
98+
catch (IOException ex) {
99+
ta.appendText(ex.toString() + '\n');
100+
}
101+
}
102+
}

‎Exercise_31/Exercise_31_05/Exercise31_05Server.class‎

3.55 KB
Binary file not shown.

‎Exercise_31/Exercise_31_05/Exercise31_05Server.java‎

Lines changed: 80 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,80 @@
1+
import java.io.*;
2+
import java.net.*;
3+
import java.util.Date;
4+
import javafx.application.Application;
5+
import javafx.application.Platform;
6+
import javafx.scene.Scene;
7+
import javafx.scene.control.ScrollPane;
8+
import javafx.scene.control.TextArea;
9+
import javafx.stage.Stage;
10+
11+
public class Exercise31_05Server extends Application {
12+
@Override // Override the start method in the Application class
13+
public void start(Stage primaryStage) {
14+
// Text area for displaying contents
15+
TextArea ta = new TextArea();
16+
17+
// Create a scene and place it in the stage
18+
Scene scene = new Scene(new ScrollPane(ta), 400, 200);
19+
primaryStage.setTitle("Exercise31_05Server"); // Set the stage title
20+
primaryStage.setScene(scene); // Place the scene in the stage
21+
primaryStage.show(); // Display the stage
22+
23+
new Thread(() -> {
24+
try {
25+
// Create a server socket
26+
ServerSocket serverSocket = new ServerSocket(8000);
27+
Platform.runLater(() ->
28+
ta.appendText("Exercise31_05Server started at "
29+
+ new Date() + '\n'));
30+
31+
// Listen for a connection request
32+
Socket socket = serverSocket.accept();
33+
34+
// Create object input stream
35+
ObjectInputStream inputFromClient = new ObjectInputStream(
36+
socket.getInputStream());
37+
38+
// Create data output stream
39+
DataOutputStream outputToClient = new DataOutputStream(
40+
socket.getOutputStream());
41+
42+
while (true) {
43+
Date date = new Date();
44+
45+
// Receive loan object from client
46+
Loan loan = (Loan)inputFromClient.readObject();
47+
48+
// Compute monthly payment and total payment
49+
double monthlyInterestRate = loan.getAnnualInterestRate() / 1200;
50+
double monthlyPayment = loan.getLoanAmount() * monthlyInterestRate
51+
/ ( 1 - 1 / Math.pow(1 + monthlyInterestRate,
52+
loan.getNumberOfYears() * 12));
53+
double totalPayment = monthlyPayment *
54+
loan.getNumberOfYears() * 12;
55+
56+
// send monthly payment and total payment back to the client
57+
outputToClient.writeDouble(monthlyPayment);
58+
outputToClient.writeDouble(totalPayment);
59+
60+
Platform.runLater(() -> {
61+
ta.appendText("Connected to a client at " + date + '\n');
62+
ta.appendText("Annual interest Rate: " +
63+
loan.getAnnualInterestRate() + '\n');
64+
ta.appendText("Number Of Years: " +
65+
loan.getNumberOfYears() + '\n');
66+
ta.appendText("Loan Amount: " + loan.getLoanAmount() + '\n');
67+
ta.appendText("monthlyPayment: " + monthlyPayment + '\n');
68+
ta.appendText("totalPayment: " + totalPayment + '\n');
69+
});
70+
}
71+
}
72+
catch (IOException ex) {
73+
ex.printStackTrace();
74+
}
75+
catch (ClassNotFoundException ex) {
76+
ex.printStackTrace();
77+
}
78+
}).start();
79+
}
80+
}

‎Exercise_31/Exercise_31_05/Loan.class‎

563 Bytes
Binary file not shown.

‎Exercise_31/Exercise_31_05/Loan.java‎

Lines changed: 24 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,24 @@
1+
public class Loan implements java.io.Serializable {
2+
private double annualInterestRate;
3+
private int numberOfYears;
4+
private double loanAmount;
5+
6+
7+
public Loan(double annualInterestRate, int numberOfYears, double loanAmount) {
8+
this.annualInterestRate = annualInterestRate;
9+
this.numberOfYears = numberOfYears;
10+
this.loanAmount = loanAmount;
11+
}
12+
13+
public double getAnnualInterestRate() {
14+
return annualInterestRate;
15+
}
16+
17+
public int getNumberOfYears() {
18+
return numberOfYears;
19+
}
20+
21+
public double getLoanAmount() {
22+
return loanAmount;
23+
}
24+
}

0 commit comments

Comments
 (0)