Question

in java

the program must contain the main method and example( the number 50 should be the input) must be included in the main method to check the correctness of your programs.

Create a GUI program to let user enter a positive integer n through the first window, and then your program prints out all the prime integers within the range [1, n) through the second window. Your program should contain two windows in total. Below are two example pictures: Result Input List of prime numbers within [1,50] Please enter a number below. 12, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47) 50 Submit Go Back

Answer 1

Code:-

// PrimeNumbers.java

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.HPos;
import javafx.geometry.Orientation;
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.layout.FlowPane;
import javafx.stage.Stage;
public class PrimeNumbers extends Application
{
   int number;
   public String getNo()
   {
       int i, no = 3, count;
       String res="[";
       if (number>=2)
       {
           res+="2";
       }
       while(no <= number)
       {
           count = 0;
           i = 2;
       while(i <= no/2 )
       {
               if(no % i == 0)
           {
               count++;
               break;
           }
           i++;
       }
       if(count == 0 && no != 1 )
               res+=", "+no;
       no++;
       }
       return res+"]";
   }
   @Override
   public void start(final Stage primaryStage)
   {
       Label inputLabel = new Label("Please enter a number below:");
       final TextField tf = new TextField("");
       Button button = new Button();
       button.setText("Submit");
       button.setOnAction(new EventHandler<ActionEvent>()
       {
           @Override
           public void handle(ActionEvent event)
           {
               number = Integer.parseInt(tf.getText());
               Label secondLabel = new Label("List of prime numbers within [1,"+number+"]");
               final TextArea pf = new TextArea(getNo());
               pf.setPrefHeight(200);
               pf.setPrefWidth(400);
               pf.setEditable(false);
               pf.setWrapText(true);
               FlowPane secondaryLayout = new FlowPane();
               secondaryLayout.setOrientation(Orientation.VERTICAL);
               secondaryLayout.setAlignment(Pos.CENTER);
               secondaryLayout.setColumnHalignment(HPos.CENTER);
               secondaryLayout.setRowValignment(VPos.CENTER);
               secondaryLayout.setVgap(10);
               Button btn = new Button("Go Back");
               secondaryLayout.getChildren().add(secondLabel);
               secondaryLayout.getChildren().add(pf);
               secondaryLayout.getChildren().add(btn);
               Scene secondScene = new Scene(secondaryLayout, 450, 280);
               final Stage newWindow = new Stage();
               newWindow.setTitle("Result");
               newWindow.setScene(secondScene);
               newWindow.setX(primaryStage.getX() + 200);
               newWindow.setY(primaryStage.getY() + 100);
               newWindow.show();
               btn.setOnAction(new EventHandler<ActionEvent>()
               {
               @Override
                   public void handle(ActionEvent event)
                   {
                       newWindow.close();
                       tf.setText("");
                   }
               });
           }
       });
       FlowPane root = new FlowPane();
       root.setOrientation(Orientation.VERTICAL);
       root.setAlignment(Pos.CENTER);
       root.setColumnHalignment(HPos.CENTER);
       root.setRowValignment(VPos.CENTER);
       root.setVgap(10);
       root.getChildren().add(inputLabel);
       root.getChildren().add(tf);
       root.getChildren().add(button);
       Scene scene = new Scene(root, 300, 180);
       primaryStage.setTitle("Input");
       primaryStage.setScene(scene);
       primaryStage.show();
   }
   public static void main(String[] args)
   {
       launch(args);
   }
}

Code Screenshots:-

1 2 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 import javafx.application. Application; import javafx.event.ActionEvent; import javafx.event. EventHandler; import javafx.geometry.HPOS; import javafx.geometry. Orientation; import javafx.geometry. Pos; import javafx.geometry.VPos; import javafx.scene. Scene; import javax.scene.control.Button; import javafx.scene.control.Label; import javafx.scene.control. TextArea; import javax.scene.control. TextField; import javafx.scene.layout. FlowPane; import javafx.stage.Stage; public class PrimeNumbers extends Application Q{ int number; public String getNo() int i, no = 3, count; String res="["; if (number>=2) { rest="2"; } while (no <= number) { 26 27 28 29 30 31 32 33 34 35 count = 0; i = 2; while (i <= no/2) { if (no % i == 0) © { count++; break; } 37 38 39 40 41 i++; } if (count == 0 && no != 1) rest=" "+no; no++;

} return rest"]"; } @Override public void start (final Stage primaryStage) { Label inputLabel = new Label("Please enter a number below:"); final TextField tf = new TextField(""); Button button = new Button(); button.setText ("Submit"); button.setOnAction (new EventHandler<ActionEvent>() { @Override public void handle (ActionEvent event) { 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 number = Integer.parseInt(tf.getText()); Label secondLabel = new Label ("List of prime numbers within [1,"+number+"]"); final TextArea pf = new TextArea (getNo()); pf.setPrefHeight (200); pf.setPrefWidth (400); pf.setEditable (false); pf. setWrapText (true); FlowPane secondaryLayout = new FlowPane(); secondaryLayout.setOrientation (Orientation. VERTICAL); secondaryLayout.setAlignment (Pos.CENTER); secondaryLayout.setColumnHalignment (HPOS.CENTER); secondaryLayout.setRowvalignment (VPOS.CENTER); secondaryLayout.setVgap (10); Button btn = new Button ("Go Back"); secondaryLayout.getChildren() .add(secondLabel); secondaryLayout.getChildren() .add (pf); secondaryLayout.getChildren() .add (btn); Scene secondScene = new Scene (secondaryLayout, 450, 280); final Stage newwindow = new Stage (); newwindow.setTitle ("Result"); newwindow.setScene (secondScene); newWindow.setX (primarystage.getX (0 + 200); newwindow.sety (primaryStage.getY() + 100);

newwindow.show(); btn.setOnAction (new EventHandler<ActionEvent>() { @Override public void handle (ActionEvent event) { newwindow.close(); tf.setText(""); }); 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 }); FlowPane root = new FlowPane(); root.setOrientation (Orientation. VERTICAL); root.setAlignment (Pos.CENTER); root.setColumnHalignment (HPOS.CENTER); root.setRowvalignment (VPOS.CENTER); root.setVgap (10); root.getChildren() .add (inputLabel); root.getChildren() .add(tf); root.getChildren() .add (button); Scene scene = new Scene (root, 300, 180); primaryStage.setTitle ("Input"); primaryStage.setScene (scene); primaryStage.show(); } public static void main(String[] args) launch(args); }

Output:-

Input Х Please enter a number below: 50 Submit

Result X List of prime numbers within [1,50] [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47] Go Back

Please UPVOTE thank you...!!!