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Commite3b0620

Browse files
author
jsquared21
committed
Add Ex31_03
1 parentce30a1a commite3b0620

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6 files changed

+214
-1
lines changed

6 files changed

+214
-1
lines changed

‎Exercise_31/Exercise_31_01/Exercise31_01Server.java

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -25,7 +25,8 @@ public void start(Stage primaryStage) {
2525
// Create a server socket
2626
ServerSocketserverSocket =newServerSocket(8000);
2727
Platform.runLater(() ->
28-
ta.appendText("Exercise31_01Server started at" +newDate() +'\n'));
28+
ta.appendText("Exercise31_01Server started at "
29+
+newDate() +'\n'));
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3031
// Listen for a connection request
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Socketsocket =serverSocket.accept();
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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;
6+
importjavafx.scene.layout.GridPane;
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importjavafx.scene.layout.BorderPane;
8+
importjavafx.scene.control.Button;
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importjavafx.scene.control.ScrollPane;
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importjavafx.scene.control.TextArea;
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importjavafx.scene.control.TextField;
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importjavafx.scene.control.Label;
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importjavafx.geometry.Pos;
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importjavafx.stage.Stage;
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publicclassExercise31_03ClientextendsApplication {
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// Create streams
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DataInputStreamfromServer =null;
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DataOutputStreamtoServer =null;
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// Create text fields for loan information
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privateTextFieldtfAnnuealInterestRate =newTextField();
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privateTextFieldtfNumberOfYears =newTextField();
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privateTextFieldtfLoanAmount =newTextField();
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// Create button for submitting loan info to the server
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privateButtonbtSubmit =newButton("Submit");
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@Override// Override the start method in the Application class
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publicvoidstart(StageprimaryStage) {
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BorderPanepane =newBorderPane();
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// Set text fields alignment right
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tfAnnuealInterestRate.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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// GridPane to hold loan information
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GridPanepaneForLoanInfo =newGridPane();
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paneForLoanInfo.add(newLabel("Annual Interest Rate"),0,0);
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paneForLoanInfo.add(tfAnnuealInterestRate,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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// Text area to display contents
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TextAreata =newTextArea();
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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_03Client");// 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 -> {
60+
try {
61+
// Get the loan information from the text fields
62+
doubleannualInterestRate =Double.parseDouble(
63+
tfAnnuealInterestRate.getText().trim());
64+
65+
intnumberOfYears =Integer.parseInt(
66+
tfNumberOfYears.getText().trim());
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68+
doubleloanAmount =Double.parseDouble(
69+
tfLoanAmount.getText().trim());
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// Send the loan information to the server
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toServer.writeDouble(annualInterestRate);
73+
toServer.writeInt(numberOfYears);
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toServer.writeDouble(loanAmount);
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toServer.flush();
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// Get monthly payment and total payment from the server
78+
doublemonthlyPayment =fromServer.readDouble();
79+
doubletotalPayment =fromServer.readDouble();
80+
81+
// Display to text area
82+
ta.appendText("Annual Interest Rate: " +annualInterestRate +'\n');
83+
ta.appendText("Number Of Years: " +numberOfYears +'\n');
84+
ta.appendText("Loan Amount: " +loanAmount +'\n');
85+
ta.appendText("monthlyPayment: " +monthlyPayment +'\n');
86+
ta.appendText("totalPayment: " +totalPayment +'\n');
87+
}
88+
catch (IOExceptionex) {
89+
System.err.println(ex);
90+
}
91+
});
92+
93+
try {
94+
// Create a socket to connect to the server
95+
Socketsocket =newSocket("localhost",8000);
96+
97+
// Create an input stream to receive data from the server
98+
fromServer =newDataInputStream(socket.getInputStream());
99+
100+
// Create an output stream to send data to the server
101+
toServer =newDataOutputStream(socket.getOutputStream());
102+
}
103+
catch (IOExceptionex) {
104+
ta.appendText(ex.toString() +'\n');
105+
}
106+
}
107+
}
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importjava.io.*;
2+
importjava.net.*;
3+
importjava.util.Date;
4+
importjavafx.application.Application;
5+
importjavafx.application.Platform;
6+
importjavafx.scene.Scene;
7+
importjavafx.scene.control.TextArea;
8+
importjavafx.scene.control.ScrollPane;
9+
importjavafx.stage.Stage;
10+
11+
publicclassExercise31_03ServerextendsApplication {
12+
// Text area for displaying contents
13+
privateTextAreata =newTextArea();
14+
15+
// Number a client
16+
privateintclientNo =0;
17+
18+
@Override// Override the start method in the Application class
19+
publicvoidstart(StageprimaryStage) {
20+
21+
// Create a scene and place it in the stage
22+
Scenescene =newScene(newScrollPane(ta),400,200);
23+
primaryStage.setTitle("Exercise31_03Server");// Set the stage title
24+
primaryStage.setScene(scene);// Place the scene in the stage
25+
primaryStage.show();// Display the stage
26+
27+
newThread(() -> {
28+
try {
29+
// Create a server socket
30+
ServerSocketserverSocket =newServerSocket(8000);
31+
Platform.runLater(() ->
32+
ta.appendText("Exercise31_03Server started at "
33+
+newDate() +'\n'));
34+
35+
while (true) {
36+
// Listen for a new connection request
37+
Socketsocket =serverSocket.accept();
38+
39+
Platform.runLater(() -> {
40+
// Display the client number
41+
ta.appendText("Starting thread for client " + ++clientNo +
42+
" at " +newDate() +'\n');
43+
});
44+
45+
// Create and start a new thread for the connection
46+
newThread(newHandleAClient(socket)).start();
47+
}
48+
}
49+
catch(IOExceptionex) {
50+
System.err.println(ex);
51+
}
52+
}).start();
53+
}
54+
55+
// Define the thread class for handling new connection
56+
classHandleAClientimplementsRunnable {
57+
privateSocketsocket;// A connected socket
58+
59+
/** Construct a thread */
60+
publicHandleAClient(Socketsocket) {
61+
this.socket =socket;
62+
}
63+
64+
/** Run a thread */
65+
publicvoidrun() {
66+
try {
67+
// Create data input and output streams
68+
DataInputStreaminputFromClient =newDataInputStream(
69+
socket.getInputStream());
70+
DataOutputStreamoutputToClient =newDataOutputStream(
71+
socket.getOutputStream());
72+
73+
// Continuously serve the client
74+
while (true) {
75+
// Receive loan information from the client
76+
doubleannualInterestRate =inputFromClient.readDouble();
77+
intnumberOfYears =inputFromClient.readInt();
78+
doubleloanAmount =inputFromClient.readDouble();
79+
80+
// Compute monthly payments and total payment
81+
doublemonthlyInterestRate =annualInterestRate /1200;
82+
doublemonthlyPayment =loanAmount *monthlyInterestRate / (
83+
1 -1 /Math.pow(1 +monthlyInterestRate,numberOfYears *12));
84+
doubletotalPayment =monthlyPayment *numberOfYears *12;
85+
86+
// Send monthly payment and total payment back to the client
87+
outputToClient.writeDouble(monthlyPayment);
88+
outputToClient.writeDouble(totalPayment);
89+
90+
Platform.runLater(() -> {
91+
ta.appendText("Annual Interest Rate: " +
92+
annualInterestRate +'\n');
93+
ta.appendText("Number Of Years: " +numberOfYears +'\n');
94+
ta.appendText("Loan Amount: " +loanAmount +'\n');
95+
ta.appendText("monthlyPayment: " +monthlyPayment +'\n');
96+
ta.appendText("totalPayment: " +totalPayment +'\n');
97+
});
98+
}
99+
}
100+
catch(IOExceptionex) {
101+
ex.printStackTrace();
102+
}
103+
}
104+
}
105+
}

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