This is probably what you want to do:
package com.mycompany.mavenproject22;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.scene.shape.Rectangle;
/**
* JavaFX App
*/
public class App extends Application {
@Override
public void start(Stage primaryStage) {
double WIDTH = 200;
double HEIGHT = 200;
// create a pane
Pane pane = new Pane();
for (int i = 0; i < 8; i++) {
boolean isWhite = i % 2 == 0;
for (int j = 0; j < 8; j++) {
Rectangle rectangle = new Rectangle(i * WIDTH / 8,
j * HEIGHT / 8, WIDTH / 8, HEIGHT / 8);
rectangle.setStroke(Color.BLACK);
if (isWhite) {
rectangle.setFill(Color.WHITE);
} else {
rectangle.setFill(Color.BLACK);
}
isWhite = !isWhite;
pane.getChildren().add(rectangle);
} // end of inner for loop
} // end of outer for loop
// create scene
Scene scene = new Scene(pane, WIDTH, HEIGHT);
primaryStage.setTitle("Display A CheckBoard");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch();
}
}
Thanks,
Gj
On Mon, Jul 6, 2020 at 11:10 AM Geertjan Wielenga <[email protected]>
wrote:
> You're creating a scene at the end of some kind of nested for loop?
>
> Gj
>
> On Mon, Jul 6, 2020 at 10:54 AM Brain Rebooting <[email protected]>
> wrote:
>
>> OK. Here I am going to submit my simple source code of JavaFX program,
>> that should show a black and white chessboard.
>>
>>
>> ------------------------------------------------------------------------------------------------------------------------------------------------
>>
>>
>> import javafx.application.Application;
>> import javafx.scene.Scene;
>> import javafx.scene.layout.Pane;
>> import javafx.scene.paint.Color;
>> import javafx.stage.Stage;
>> import javafx.scene.shape.Rectangle;
>>
>> /**
>> *
>> * @author samiul alom sium
>> * date: 07.07.2020
>> *
>> * problem: (Game: display a checkerboard) Write a program that displays
>> * a checkerboard in which each white and black cell is a Rectangle
>> * with a fill color black or white.
>> */
>>
>> public class DisplayACheckBoard extends Application {
>>
>> @Override
>> public void start(Stage primaryStage) {
>>
>> double WIDTH = 200;
>> double HEIGHT = 200;
>>
>> // create a pane
>> Pane pane = new Pane();
>>
>> for(int i = 0; i < 8; i++){
>> boolean isWhite = i % 2 == 0;
>> for(int j = 0; j < 8; j++){
>> Rectangle rectangle = new Rectangle(i * WIDTH / 8,
>> j * HEIGHT / 8, WIDTH / 8, HEIGHT / 8);
>>
>> rectangle.setStroke(Color.BLACK);
>>
>> if(isWhite){
>> rectangle.setFill(Color.WHITE);
>> }
>> else {
>> rectangle.setFill(Color.BLACK);
>> }
>>
>> isWhite = !isWhite;
>>
>> pane.getChildren().add(rectangle);
>>
>> // create scene
>> Scene scene = new Scene(pane, WIDTH, HEIGHT);
>> primaryStage.setTitle("Display A CheckBoard");
>> primaryStage.setScene(scene);
>> primaryStage.show();
>>
>> } // end of inner for loop
>> } // end of outer for loop
>>
>> }
>>
>> public static void main(String[] args) {
>> launch(args);
>>
>>
>> ------------------------------------------------------------------------------------------------------------------------------------------------------
>>
>> Here I used:
>>
>> JDK: amazon corretto 1.8.0 252
>> OS: Ubuntu 18.04.4 LTS
>> IDE: Apache NetBeans 12
>> Build Tool: Ant
>>
>> //
>> Extra info:
>> Even netbeans-12 error detector didn't show any error on the above code.
>> Problem arises when I am going to run the code. I try to clean and build
>> projects and then run the projects, but still same results come in. But the
>> strange thing is, this same source code works in IntelliJ IDEA community
>> edition with same compiler. Even I can't remember I could see any GUI
>> result of my JavaFX program in NB-12, but I could do that well in NB-11.3
>> //
>>
>> On Mon, Jul 6, 2020 at 2:52 PM Brain Rebooting <[email protected]>
>> wrote:
>>
>>> OK. Here I am going to submit my simple source code of JavaFX program,
>>> that should show a black and white chessboard.
>>>
>>>
>>> ------------------------------------------------------------------------------------------------------------------------------------------------
>>>
>>>
>>> import javafx.application.Application;
>>> import javafx.scene.Scene;
>>> import javafx.scene.layout.Pane;
>>> import javafx.scene.paint.Color;
>>> import javafx.stage.Stage;
>>> import javafx.scene.shape.Rectangle;
>>>
>>> /**
>>> *
>>> * @author samiul alom sium
>>> * date: 07.07.2020
>>> *
>>> * problem: (Game: display a checkerboard) Write a program that displays
>>> * a checkerboard in which each white and black cell is a Rectangle
>>> * with a fill color black or white.
>>> */
>>>
>>> public class DisplayACheckBoard extends Application {
>>>
>>> @Override
>>> public void start(Stage primaryStage) {
>>>
>>> double WIDTH = 200;
>>> double HEIGHT = 200;
>>>
>>> // create a pane
>>> Pane pane = new Pane();
>>>
>>> for(int i = 0; i < 8; i++){
>>> boolean isWhite = i % 2 == 0;
>>> for(int j = 0; j < 8; j++){
>>> Rectangle rectangle = new Rectangle(i * WIDTH / 8,
>>> j * HEIGHT / 8, WIDTH / 8, HEIGHT / 8);
>>>
>>> rectangle.setStroke(Color.BLACK);
>>>
>>> if(isWhite){
>>> rectangle.setFill(Color.WHITE);
>>> }
>>> else {
>>> rectangle.setFill(Color.BLACK);
>>> }
>>>
>>> isWhite = !isWhite;
>>>
>>> pane.getChildren().add(rectangle);
>>>
>>> // create scene
>>> Scene scene = new Scene(pane, WIDTH, HEIGHT);
>>> primaryStage.setTitle("Display A CheckBoard");
>>> primaryStage.setScene(scene);
>>> primaryStage.show();
>>>
>>> } // end of inner for loop
>>> } // end of outer for loop
>>>
>>> }
>>>
>>> public static void main(String[] args) {
>>> launch(args);
>>>
>>>
>>> ------------------------------------------------------------------------------------------------------------------------------------------------------
>>>
>>> Here I used:
>>>
>>> JDK: amazon corretto 1.8.0 252
>>> OS: Ubuntu 18.04.4 LTS
>>> IDE: Apache NetBeans 12
>>> Build Tool: Ant
>>>
>>> //
>>> Extra info:
>>> Even netbeans-12 error detector didn't show any error on the above code.
>>> Problem arises when I am going to run the code. I try to clean and build
>>> projects and then run the projects, but still same results come in. But the
>>> strange thing is, this same source code works in IntelliJ IDEA community
>>> edition with same compiler. Even I can't remember I could see any GUI
>>> result of my JavaFX program in NB-12, but I could do that well in NB-11.3
>>> //
>>>
>>> On Mon, Jul 6, 2020 at 1:08 PM Geertjan Wielenga <[email protected]>
>>> wrote:
>>>
>>>> Can you provide any info so someone can reproduce the problem?
>>>>
>>>> Gj
>>>>
>>>> On Mon, 6 Jul 2020 at 08:02, Brain Rebooting <[email protected]>
>>>> wrote:
>>>>
>>>>> Probably not only this specific program. After installing NetBeans 12,
>>>>> none of my JavaFX program show output (with ant build). But NetBeans 11.3
>>>>> with all same configuration, did output my JavaFX program.
>>>>>
>>>>> On Mon, Jul 6, 2020 at 11:47 AM Brain Rebooting <
>>>>> [email protected]> wrote:
>>>>>
>>>>>>
>>>>>> Problems started from this line on the console:
>>>>>>
>>>>>> Exception in Application start method
>>>>>>
>>>>>> But when I run the same program in IntelliJ IDEA community edition,
>>>>>> it just works and literally I don't see any error on my own source code.
>>>>>> Apache NetBeans error detector don't show any error on my source code.
>>>>>> But
>>>>>> still when I try to execute it, these errors are displaying on the
>>>>>> console.
>>>>>>
>>>>>> On Mon, Jul 6, 2020 at 11:43 AM Emilian Bold <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>>> Please send email to the mailing list (reply all) not just to me.
>>>>>>>
>>>>>>> --emi
>>>>>>>
>>>>>>> lun., 6 iul. 2020, 08:34 Brain Rebooting <[email protected]>
>>>>>>> a scris:
>>>>>>>
>>>>>>>> Problems started from this line on the console:
>>>>>>>>
>>>>>>>> Exception in Application start method
>>>>>>>>
>>>>>>>> But when I run the same program in IntelliJ IDEA community edition,
>>>>>>>> it just works and literally I don't see any error on my own source
>>>>>>>> code.
>>>>>>>> Apache NetBeans error detector don't show any error on my source code.
>>>>>>>> But
>>>>>>>> still when I try to execute it, these errors are displaying on the
>>>>>>>> console.
>>>>>>>>
>>>>>>>> On Mon, Jul 6, 2020 at 11:30 AM Emilian Bold <
>>>>>>>> [email protected]> wrote:
>>>>>>>>
>>>>>>>>> Start by telling us which errors you see.
>>>>>>>>>
>>>>>>>>> --emi
>>>>>>>>>
>>>>>>>>> lun., 6 iul. 2020, 08:04 Brain Rebooting <[email protected]>
>>>>>>>>> a scris:
>>>>>>>>>
>>>>>>>>>> Why Apache NetBeans 12 don't execute my JavaFX program? I run the
>>>>>>>>>> same to same program in IntelliJ IDEA community edition and it
>>>>>>>>>> works. But
>>>>>>>>>> NetBeans shows there are some errors. Here is my software usage:
>>>>>>>>>>
>>>>>>>>>> Apache NetBeans 12
>>>>>>>>>> Ubuntu 18
>>>>>>>>>> JDK 8
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Samiul alom sium
>>>>>>>>>> Bangladesh
>>>>>>>>>>
>>>>>>>>>
