commit Exercise_31_03

csv77 · csv77 · commit d58e83248f69 · 2017-10-05T15:43:14.000+02:00
diff --git a/Chapter_31/exercise_31_03Client/Exercise_31_03Client.java b/Chapter_31/exercise_31_03Client/Exercise_31_03Client.java
@@ -0,0 +1,96 @@
+package exercise_31_03Client;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.net.Socket;
+import javafx.application.Application;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.control.TextArea;
+import javafx.scene.control.TextField;
+import javafx.scene.layout.BorderPane;
+import javafx.scene.layout.GridPane;
+import javafx.stage.Stage;
+
+public class Exercise_31_03Client extends Application {
+    private DataInputStream inputFromServer = null;
+    private DataOutputStream outputToServer = null;
+    
+    @Override
+    public void start(Stage primaryStage) {
+        BorderPane borderPane = new BorderPane();
+        
+        TextArea taStatus = new TextArea();
+        borderPane.setCenter(new ScrollPane(taStatus));
+        
+        GridPane grid = new GridPane();
+        
+        TextField tfRate = new TextField();
+        tfRate.setAlignment(Pos.BASELINE_RIGHT);
+        tfRate.setPrefColumnCount(10);
+        
+        TextField tfYears = new TextField();
+        tfYears.setAlignment(Pos.BASELINE_RIGHT);
+        tfYears.setPrefColumnCount(10);
+        
+        TextField tfAmount = new TextField();
+        tfAmount.setAlignment(Pos.BASELINE_RIGHT);
+        tfAmount.setPrefColumnCount(10);
+        
+        Button btSubmit = new Button("Submit");
+        
+        grid.add(new Label("Annual Interest Rate"), 0, 0);
+        grid.add(tfRate, 1, 0);
+        grid.add(new Label("Number Of Years"), 0, 1);
+        grid.add(tfYears, 1, 1);
+        grid.add(btSubmit, 2, 1);
+        grid.add(new Label("Loan Amount"), 0, 2);
+        grid.add(tfAmount, 1, 2);
+        borderPane.setTop(grid);
+        
+        Scene scene = new Scene(borderPane, 300, 200);
+        primaryStage.setTitle("Exercise_31_01Client");
+        primaryStage.setScene(scene);
+        primaryStage.show();
+        
+        try {
+            Socket socket = new Socket("localhost", 8000);
+            inputFromServer = new DataInputStream(socket.getInputStream());
+            outputToServer = new DataOutputStream(socket.getOutputStream());
+        }
+        catch (IOException ex) {
+            taStatus.appendText(ex.toString() + "\n");
+        }
+        
+        btSubmit.setOnAction(e -> {
+            try {
+                double interestRate = Double.parseDouble(tfRate.getText().trim());
+                int numberOfYears = Integer.parseInt(tfYears.getText().trim());
+                double amount = Double.parseDouble(tfAmount.getText().trim());
+                
+                outputToServer.writeDouble(interestRate);
+                outputToServer.writeInt(numberOfYears);
+                outputToServer.writeDouble(amount);
+                
+                taStatus.appendText("Annual interest rate: " + interestRate + "\n" + 
+                            "Number of Years: " + numberOfYears + "\n" + "Loan amount: " + amount + "\n");
+                
+                double monthlyPayment = inputFromServer.readDouble();
+                double totalPayment = inputFromServer.readDouble();
+                taStatus.appendText("monthlyPayment: " + monthlyPayment + "\n" + 
+                            "totalPayment: " + totalPayment + "\n");
+            }
+            catch (IOException ex) {
+                System.err.println(ex);
+            }
+        });
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+}
