Java语言程序设计梁勇第31-38章全部完整习题答案

Java语言程序设计（梁勇）第31-38章全部完整习题答案

// Exercise31_01Client.java: The client sends the input to the server and receives
// result back from the server
import java.io.*;
import java.net.*;
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 Exercise31_01Client extends Application {
  // Text field for receiving radius
  private TextField tfAnnualInterestRate = new TextField（）;
  private TextField tfNumOfYears = new TextField（）;
  private TextField tfLoanAmount = new TextField（）;
  private Button btSubmit= new Button（“Submit“）;

  // Text area to display contents
  private TextArea ta = new TextArea（）;

  // IO streams
  DataOutputStream osToServer;
  DataInputStream isFromServer;
  
  @Override // Override the start method in the Application class
  public void start（Stage primaryStage） {
    ta.setWrapText（true）;
   
    GridPane gridPane = new GridPane（）;
    gridPane.add（new Label（“Annual Interest Rate“） 0 0）;
    gridPane.add（new Label（“Number Of Years“） 0 1）;
    gridPane.add（new Label（“Loan Amount“） 0 2）;
    gridPane.add（tfAnnualInterestRate 1 0）;
    gridPane.add（tfNumOfYears 1 1）;
    gridPane.add（tfLoanAmount 1 2）;
    gridPane.add（btSubmit 2 1）;
    
    tfAnnualInterestRate.setAlignment（Pos.baseLINE_RIGHT）;
    tfNumOfYears.setAlignment（Pos.baseLINE_RIGHT）;
    tfLoanAmount.setAlignment（Pos.baseLINE_RIGHT）;
    
    tfLoanAmount.setPrefColumnCount（5）;
    tfNumOfYears.setPrefColumnCount（5）;
    tfLoanAmount.setPrefColumnCount（5）;
            
    BorderPane pane = new BorderPane（）;
    pane.setCenter（new ScrollPane（ta））;
    pane.setTop（gridPane）;
    
    // Create a scene and place it in the stage
    Scene scene = new Scene（pane 200 200）;
    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 -> connectToServer（））;
    
    try {
      // Create a socket to connect to the server
      Socket connectToServer = new Socket（“localhost“ 8000）;
      //Socket connectToServer = new Socket（“130.254.204.36“ 8000）;
      //Socket connectToServer = new Socket（
      //  “drake.Armstrong.edu“ 8000）;

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

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

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     文件        559  2013-08-22 16:32  chapter33\build\web\Exercise33_01.xhtml

     文件        541  2013-08-22 16:32  chapter33\build\web\Exercise33_02.xhtml

     文件       1298  2013-08-22 16:32  chapter33\build\web\Exercise33_03.xhtml

     文件       1046  2013-08-22 16:32  chapter33\build\web\Exercise33_04.xhtml

     文件        453  2013-08-22 16:32  chapter33\build\web\Exercise33_04a.xhtml

     文件       2225  2013-08-22 16:32  chapter33\build\web\Exercise33_05.xhtml

     文件       1341  2013-08-22 16:32  chapter33\build\web\Exercise33_05a.xhtml

     文件       2728  2013-08-22 16:32  chapter33\build\web\Exercise33_07.xhtml

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