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Commitce30a1a

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author
jsquared21
committed
Add Ex31_02
1 parent26aa084 commitce30a1a

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4 files changed

+179
-0
lines changed

4 files changed

+179
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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.geometry.Pos;
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importjavafx.scene.Scene;
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importjavafx.scene.control.Button;
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importjavafx.scene.control.Label;
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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.scene.control.ScrollPane;
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importjavafx.scene.layout.GridPane;
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importjavafx.scene.layout.BorderPane;
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importjavafx.stage.Stage;
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publicclassExercise31_02ClientextendsApplication {
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// IO streams
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DataOutputStreamtoServer =null;
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DataInputStreamfromServer =null;
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// Text fields for BMI information
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privateTextFieldtfWeight =newTextField();
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privateTextFieldtfHeight =newTextField();
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@Override// Override the start method in the Application class
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publicvoidstart(StageprimaryStage) {
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// Main pane
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BorderPanepane =newBorderPane();
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// Set text field alignment right
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tfWeight.setAlignment(Pos.BASELINE_RIGHT);
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tfHeight.setAlignment(Pos.BASELINE_RIGHT);
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// Create button to send BMI info to server
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ButtonbtSubmit =newButton("Submit");
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// Pane to hold BMI information and submit button
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GridPanepaneForBmiInfo =newGridPane();
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paneForBmiInfo.add(newLabel("Weight in pounds"),0,0);
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paneForBmiInfo.add(tfWeight,1,0);
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paneForBmiInfo.add(newLabel("Height in inches"),0,1);
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paneForBmiInfo.add(tfHeight,1,1);
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paneForBmiInfo.add(btSubmit,2,1);
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// Text Area to display contents
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TextAreata =newTextArea();
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pane.setTop(paneForBmiInfo);
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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,400,200);
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primaryStage.setTitle("Exercise31_01Client");// 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 the weight and height from the text fields
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doubleweight =Double.parseDouble(tfWeight.getText().trim());
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doubleheight =Double.parseDouble(tfHeight.getText().trim());
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// Send the BMI information to the server
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toServer.writeDouble(weight);
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toServer.writeDouble(height);
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toServer.flush();
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// Get string from the server
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Stringbmi =fromServer.readUTF();
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// Display to text area
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ta.appendText("Weight: " +weight +'\n');
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ta.appendText("Height: " +height +'\n');
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ta.appendText(bmi +'\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 data to the server
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toServer =newDataOutputStream(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.TextArea;
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importjavafx.scene.control.ScrollPane;
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importjavafx.stage.Stage;
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publicclassExercise31_02ServerextendsApplication {
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finaldoubleKILOGRAMS_PER_POUND =0.45359237;// Kilograms per pound
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finaldoubleMETERS_PER_INCH =0.0254;// Meters per Inch
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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),450,200);
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primaryStage.setTitle("Exercise31_02Server");// 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_02Server 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 data input and output streams
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DataInputStreaminputFromClient =newDataInputStream(
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socket.getInputStream());
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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 the weight and height from the server
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doubleweight =inputFromClient.readDouble();
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doubleheight =inputFromClient.readDouble();
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// Compute the BMI (Body Mass Index)
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doubleweightInKilograms =weight *KILOGRAMS_PER_POUND;
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doubleheightInMeters =height *METERS_PER_INCH;
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doublebmi =weightInKilograms /Math.pow(heightInMeters,2);
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// Create string with BMI information
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StringBuilderstrBMI =newStringBuilder("BMI is " +
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String.format("%.2f",bmi) +". ");
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if (bmi <18.5)
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strBMI.append("Underweight");
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elseif (bmi <25)
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strBMI.append("Normal");
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elseif (bmi <30)
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strBMI.append("Overweight");
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else
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strBMI.append("Obese");
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// Send string back to client
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outputToClient.writeUTF(strBMI.toString());
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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("Weight: " +weight +'\n');
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ta.appendText("Height: " +height +'\n');
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ta.appendText(strBMI.toString() +'\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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}).start();
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}
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}

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