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bug fix ex 31 023
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@HarryDulaney
HarryDulaney committed Nov 19, 2023
1 parent ff55044 commit 0c07efd
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Showing 3 changed files with 114 additions and 128 deletions.
7 changes: 5 additions & 2 deletions ch_31/exercise31_02/Exercise31_02.java
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Expand Up @@ -15,7 +15,10 @@ public class Exercise31_02 extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
System.out.println("##-_-_--_--_--__-_-- Starting: Exercise31_02 --_-__--__--__--_--_--##");
Platform.runLater(() -> new Exercise31_02Server().start(new Stage()));
Platform.runLater(() -> new Exercise31_02Client().start(new Stage()));
new Thread(() -> {
Platform.runLater(() -> new Exercise31_02Server().start(new Stage()));
Platform.runLater(() -> new Exercise31_02Client().start(new Stage()));
}).start();

}
}
152 changes: 69 additions & 83 deletions ch_31/exercise31_02/Exercise31_02Client.java
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@@ -1,106 +1,92 @@
package ch_31.exercise31_02;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.HPos;
import javafx.geometry.Pos;
import javafx.geometry.VPos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.control.*;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

import java.io.*;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;

public class Exercise31_02Client extends Application {
private TextField weightTextInput = new TextField();
private TextField heightTextInput = new TextField();
private TextArea displayResultTextArea = new TextArea();
DataOutputStream toServer = null;
DataInputStream fromServer = null;

private Button submitButton = new Button("Submit");
// Text fields for BMI information
private TextField tfWeight = new TextField();
private TextField tfHeight = new TextField();

// Host name or ip
String host = "localhost";
@Override // Override the start method in the Application class
public void start(Stage primaryStage) {
// Main pane
BorderPane pane = new BorderPane();

private ObjectOutputStream toServer;
private DataInputStream fromServer;
// Set text field alignment right
tfWeight.setAlignment(Pos.BASELINE_RIGHT);
tfHeight.setAlignment(Pos.BASELINE_RIGHT);

public Exercise31_02Client() {
System.out.println("##-_-_--_--_--__-_-- Starting: Exercise31_02Client --_-__--__--__--_--_--##");
}
// Create button to send BMI info to server
Button btSubmit = new Button("Submit");

@Override
public void start(Stage primaryStage) {
Stage stage = new Stage();
GridPane pane = new GridPane();
pane.add(new Label("Weight in pounds"), 0, 0);
pane.add(weightTextInput, 1, 0);
pane.add(new Label("Height in inches"), 0, 1);
pane.add(heightTextInput, 1, 1);
pane.add(submitButton, 1, 3);
pane.add(displayResultTextArea, 1, 4);
GridPane.setHalignment(submitButton, HPos.RIGHT);
GridPane.setValignment(displayResultTextArea, VPos.BOTTOM);
pane.setAlignment(Pos.CENTER);
weightTextInput.setPrefColumnCount(15);
heightTextInput.setPrefColumnCount(15);
submitButton.setOnAction(new ButtonListener());

Scene scene = new Scene(pane, 450, 200);
stage.setTitle("BMI Client");
stage.setScene(scene);
stage.show();

try (Socket socket = new Socket(host, 8000)) {
// Create an output stream to the server
toServer = new ObjectOutputStream(socket.getOutputStream());
// Create an input stream from the server
fromServer = new DataInputStream(socket.getInputStream());
} catch (IOException ex) {
System.out.println("##----------- Client Error: IOException: " + ex.getMessage() + " -----------##");
}
}
// Pane to hold BMI information and submit button
GridPane paneForBmiInfo = new GridPane();
paneForBmiInfo.add(new Label("Weight in pounds"), 0, 0);
paneForBmiInfo.add(tfWeight, 1, 0);
paneForBmiInfo.add(new Label("Height in inches"), 0, 1);
paneForBmiInfo.add(tfHeight, 1, 1);
paneForBmiInfo.add(btSubmit, 2, 1);

// Text Area to display contents
TextArea ta = new TextArea();
pane.setTop(paneForBmiInfo);
pane.setCenter(new ScrollPane(ta));

/**
* Custom event handler for the submit button
*/
private class ButtonListener implements EventHandler<ActionEvent> {
@Override
public void handle(ActionEvent e) {
// Create a scene and place it in the stage
Scene scene = new Scene(pane, 400, 200);
primaryStage.setTitle("Exercise31_01Client"); // Set the stage title
primaryStage.setScene(scene); // Place the scene in the stage
primaryStage.show(); // Display the stage

btSubmit.setOnAction(e -> {
try {
// Get weight and height from the text fields
double weight = Double.parseDouble(weightTextInput.getText().trim());
double height = Double.parseDouble(heightTextInput.getText().trim());
// Create a BmiDto and send to the server
BmiDto s = new BmiDto(weight, height);
toServer.writeObject(s);
// Get the weight and height from the text fields
double weight = Double.parseDouble(tfWeight.getText().trim());
double height = Double.parseDouble(tfHeight.getText().trim());

// Send the BMI information to the server
toServer.writeDouble(weight);
toServer.writeDouble(height);
toServer.flush();
// Get resulting BMI from the server
double bmi = fromServer.readDouble();
// Display to the text area
displayResultTextArea.setText("Weight: " + weight + "\nHeight: " + height + "\nBMI is: " + bmi
+ "\n" + getCategory(bmi));
} catch (IOException ex) {
System.out.println("##----------- Client Error: IOException: " + ex.getMessage() + " -----------##");

// Get string from the server
String bmi = fromServer.readUTF();

// Display to text area
ta.appendText("Weight: " + weight + '\n');
ta.appendText("Height: " + height + '\n');
ta.appendText(bmi + '\n');
}
}
}
catch (IOException ex) {
System.err.println(ex);
}
});

private String getCategory(double bmi) {
if (bmi < 18.5) {
return "Underweight";
} else if (bmi < 25) {
return "Normal";
} else if (bmi < 30) {
return "Overweight";
} else {
return "Obese";
try {
// Create a socket to connect to the server
Socket socket = new Socket("localhost", 8000);

// Create an input stream to receive data from the server
fromServer = new DataInputStream(socket.getInputStream());

// Create an output stream to send data to the server
toServer = new DataOutputStream(socket.getOutputStream());
}
catch (IOException ex) {
ta.appendText(ex.toString() + '\n');
}
}

}
83 changes: 40 additions & 43 deletions ch_31/exercise31_02/Exercise31_02Server.java
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Expand Up @@ -11,67 +11,64 @@
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicBoolean;


public class Exercise31_02Server extends Application {
private static final double KILOGRAMS_PER_POUND = 0.45359237;
private static final double METERS_PER_INCH = 0.0254;

private AtomicBoolean isRunning = new AtomicBoolean(true);

public Exercise31_02Server() {
System.out.println("##-_-_--_--_--__-_-- Starting: Exercise31_02Server --_-__--__--__--_--_--##");
}


@Override
public void start(Stage primaryStage) {
TextArea displayLogTextArea = new TextArea();
Scene scene = new Scene(new ScrollPane(displayLogTextArea), 450, 200);
primaryStage.setTitle("TicTacToeServer");
primaryStage.setScene(scene);
primaryStage.show();
new Thread(() -> runServer(displayLogTextArea)).start();
}
new Thread(() -> {
try {
ServerSocket serverSocket = new ServerSocket(8000);
Platform.runLater(() ->
displayLogTextArea.appendText("Exercise31_02Server started at "
+ new Date() + '\n'));

private void runServer(TextArea displayLogTextArea) {
/* Create a server socket. Use try with resources to close the socket automatically */
try (ServerSocket serverSocket = new ServerSocket(8000)) {
// Listen for a connection request
Socket socket = socket = serverSocket.accept();
// Create data input and output streams
try (ObjectInputStream inputFromClient = new ObjectInputStream(
socket.getInputStream())) {
try (DataOutputStream outputToClient = new DataOutputStream(
socket.getOutputStream())) {
Socket socket = serverSocket.accept();
DataInputStream inputFromClient = new DataInputStream(
socket.getInputStream());
DataOutputStream outputToClient = new DataOutputStream(
socket.getOutputStream());

Platform.runLater(() -> displayLogTextArea.appendText(new Date() +
": Server started at socket 8000\n"));
while (true) {
if (!isRunning.get()) {
break;
}
if (inputFromClient.available() > 0) {
// Receive Object from the client
Object object = inputFromClient.readObject();
if (Objects.nonNull(object) && object instanceof BmiDto) {
BmiDto bmiDto = (BmiDto) object;
double weight = bmiDto.getWeight();
double height = bmiDto.getHeight();
double bmi = calculateBmi(weight, height);
// Send area back to the client
outputToClient.writeDouble(bmi);
}
}
while (true) {
Date date = new Date();
double weight = inputFromClient.readDouble();
double height = inputFromClient.readDouble();
double weightInKilograms = weight * KILOGRAMS_PER_POUND;
double heightInMeters = height * METERS_PER_INCH;
double bmi = calculateBmi(weightInKilograms, heightInMeters);
StringBuilder bmiString = new StringBuilder("BMI is " +
String.format("%.2f", bmi) + ". ");

if (bmi < 18.5) {
bmiString.append("Underweight");
} else if (bmi < 25) {
bmiString.append("Normal");
} else if (bmi < 30) {
bmiString.append("Overweight");
} else {
bmiString.append("Obese");
}
outputToClient.writeUTF(bmiString.toString());

Platform.runLater(() -> {
displayLogTextArea.appendText("Connected to a client at " + date + '\n');
displayLogTextArea.appendText("Weight: " + weight + '\n');
displayLogTextArea.appendText("Height: " + height + '\n');
displayLogTextArea.appendText(bmiString.toString() + '\n');
});
}
} catch (IOException ex) {
ex.printStackTrace();
}

} catch (ClassNotFoundException | IOException ex) {
System.out.println("##----------- Server Error: Exception: " + ex.getMessage() + " -----------##");
}
}).start();
}

private double calculateBmi(double weight, double height) {
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