Thread: no idea what is wrong with this code

had to fix this code for school, everyone now fixed every error they previously had and now everyone has the same errors and nobody can figure out why


the code:

import javafx.scene.Scene;
import javafx.stage.Stage;
 
 
import javafx.scene.layout.*;
import javafx.scene.control.*;
import javafx.scene.text.*;
 
 
 
public class Opdracht1WEEE extends Application
{
 
 
	GridPane mijnGrid;
	Scene scene;
 
	Text scenetitle;
 
 
 
	public void start(Stage primaryStage)
	{
 
 
 
		primaryStage.setScene(scene);
		Scene scenE = new Scene(mijnGrid, 400, 250);
		primaryStage.setTitle(titelTekst);
    primaryStage.show();
 
 
		String titelTekst = "WEEE - Periode 1, Les 1";
 
 
		Text scenetitel = new Text(titelTekst);
		scenetitel.setFont(Font.font("Calibri", FontWeight.NORMAL, 30));
    mijnGrid.add(scenetitle, 0, 0, 2, 1);
 
		Label vraag0 = new Label("Gefeliciteerd! Het werkt!");
    vraag0.setFont(Font.font("Arial", FontPosture.ITALIC, 20));
    mijnGrid.add(vraagO, 0, 1); mijnGrid = new GridPane();
 
		for (char karakter : vraag0.getText(ToCharArray())) {
			System.out.println(karakter);
		}
 
		System.out.println(vraag0.getText).replace(('!'),(' ') + ("nog niet helemaal"));
 
 
		Label vraag1 = new Label("Hoe vond je de opdracht?");
		TextField antwoord1 = new TextField();
    mijnGrid.add(vraag1, 0, 2);
		mijnGrid.add(antwoord1, 1, 2);
 
 
 
		Label vraag2 = new Label("Wat vond je lastig?");
		mijnGrid.add(vraag2, 0, 3);
 
		if (vraag.getText())toCharArray [0] = 'W';
		{ CheckBox antwoord2A = new CheckBox("Spelling");
			CheckBox antwoord2B = new CheckBox("Interpunctie");
      CheckBox antwoord2C = new CheckBox("Volgorde");
			CheckBox antwoord2D = new CheckBox("Structuur & Layout");
			mijnGrid.add(antwoordA, 1, 3);
			mijnGrid.add(antwoord2B, 1, 4);
			mijnGrid.add(antwoorb2D, 1, 6);
			mijnGrid.add(antwoord2C, 1, 5);
    }
 
		}
 
 
 
	public static void main(String[] args)
	{
 
 
		int getalNummerA = -1;
 
 
 
		if (args.length > 0) {
			tekstEen = args[0].toString();
		}
 
 
		String tekstEen = "";
 
		System.out.println(getalnummerA);
 
		System.out.println("Hallo" + tekstEen);
 
 
		if (magVerder && (getalNummerA == 0 || textEen.isEmpty()))
		{
			getalNumerA = Math.round( (20.0f  * (float)Math.random() ));
 
			if (getalNummerA > 0) { launch(Args);
 
 
 
		boolean magverder = true;
		}
 
	}
}
}

the errors when compiling:

D:\School\TPR CODE JAVA\CODE>javac Opdracht1WEEE.java
Opdracht1WEEE.java:13: error: cannot find symbol
public class Opdracht1WEEE extends Application
                                   ^
  symbol: class Application
Opdracht1WEEE.java:31: error: cannot find symbol
                primaryStage.setTitle(titelTekst);
                                      ^
  symbol:   variable titelTekst
  location: class Opdracht1WEEE
Opdracht1WEEE.java:44: error: cannot find symbol
    mijnGrid.add(vraagO, 0, 1); mijnGrid = new GridPane();
                 ^
  symbol:   variable vraagO
  location: class Opdracht1WEEE
Opdracht1WEEE.java:46: error: cannot find symbol
                for (char karakter : vraag0.getText(ToCharArray())) {
                                                    ^
  symbol:   method ToCharArray()
  location: class Opdracht1WEEE
Opdracht1WEEE.java:50: error: cannot find symbol
                System.out.println(vraag0.getText).replace(('!'),(' ') + ("nog niet helemaal"));
                                         ^
  symbol:   variable getText
  location: variable vraag0 of type Label
Opdracht1WEEE.java:63: error: cannot find symbol
                if (vraag.getText())toCharArray [0] = 'W';
                    ^
  symbol:   variable vraag
  location: class Opdracht1WEEE
Opdracht1WEEE.java:63: error: cannot find symbol
                if (vraag.getText())toCharArray [0] = 'W';
                                    ^
  symbol:   variable toCharArray
  location: class Opdracht1WEEE
Opdracht1WEEE.java:68: error: cannot find symbol
                        mijnGrid.add(antwoordA, 1, 3);
                                     ^
  symbol:   variable antwoordA
  location: class Opdracht1WEEE
Opdracht1WEEE.java:70: error: cannot find symbol
                        mijnGrid.add(antwoorb2D, 1, 6);
                                     ^
  symbol:   variable antwoorb2D
  location: class Opdracht1WEEE
Opdracht1WEEE.java:87: error: cannot find symbol
                        tekstEen = args[0].toString();
                        ^
  symbol:   variable tekstEen
  location: class Opdracht1WEEE
Opdracht1WEEE.java:93: error: cannot find symbol
                System.out.println(getalnummerA);
                                   ^
  symbol:   variable getalnummerA
  location: class Opdracht1WEEE
Opdracht1WEEE.java:98: error: cannot find symbol
                if (magVerder && (getalNummerA == 0 || textEen.isEmpty()))
                    ^
  symbol:   variable magVerder
  location: class Opdracht1WEEE
Opdracht1WEEE.java:98: error: cannot find symbol
                if (magVerder && (getalNummerA == 0 || textEen.isEmpty()))
                                                       ^
  symbol:   variable textEen
  location: class Opdracht1WEEE
Opdracht1WEEE.java:100: error: cannot find symbol
                        getalNumerA = Math.round( (20.0f  * (float)Math.random() ));
                        ^
  symbol:   variable getalNumerA
  location: class Opdracht1WEEE
Opdracht1WEEE.java:102: error: cannot find symbol
                        if (getalNummerA > 0) { launch(Args);
                                                       ^
  symbol:   variable Args
  location: class Opdracht1WEEE
15 errors

hope some of you know what is going on.

Wow, with so many issues with that code this it's hard to know where to start.

You're definitely missing an import statement:

import javafx.application.Application;

You're trying to use a variable 'titelTekst' before it's even declared:

primaryStage.setTitle(titelTekst);
primaryStage.show();
String titelTekst = "WEEE - Periode 1, Les 1";

You're trying to add 'vraagO' to the GridPane but you created the label with the name as 'vraag0' (with a zero, not upper-case O):

mijnGrid.add(vraagO, 0, 1);

You're calling a 'ToCharArray()' function that doesn't exist anywhere:

for (char karakter : vraag0.getText(ToCharArray())) { // Should be 'vraag0.getText().toCharArray()'
	System.out.println(karakter);
}

You're calling the getText() function of the label incorrectly:

System.out.println(vraag0.getText).replace(('!'), (' ') + ("nog niet helemaal"));

You're referencing a 'vraag' label that doesn't exist, and referencing a 'toCharArray' array that doesn't exist anywhere:

if (vraag.getText()) {
	toCharArray[0] = 'W';
}

You're creating CheckBoxes with names 'antwoord2A' and 'antwoord2D' but then you're misspelling the names when trying to use them:

CheckBox antwoord2A = new CheckBox("Spelling");
CheckBox antwoord2B = new CheckBox("Interpunctie");
CheckBox antwoord2C = new CheckBox("Volgorde");
CheckBox antwoord2D = new CheckBox("Structuur & Layout");
mijnGrid.add(antwoordA, 1, 3); // NO, you named it 'antwoord2A' not 'antwordA'
mijnGrid.add(antwoord2B, 1, 4);
mijnGrid.add(antwoorb2D, 1, 6); // NO, you named it 'antwoord2D' not 'antwoorb2D'
mijnGrid.add(antwoord2C, 1, 5);

Your main() function also has references to variables and functions that don't exist (e.g. 'Args' instead of 'args', for one).

I would start by adding the missing import statement and cleaning up the simple mistakes like variable name mismatches and using variables before they're defined. Once all that noise is gone, the remaining issues should be easier to isolate and fix.

Thanks, with your help i got it down to 4 errors. i am kinda stuck again tho :/

code now:

 
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.application.Application;
 
 
import javafx.scene.layout.*;
import javafx.scene.control.*;
import javafx.scene.text.*;
 
 
 
public class Opdracht1WEEE extends Application
{
 
 
	GridPane mijnGrid;
	Scene scene;
 
	Text scenetitle;
 
 
 
	public void start(Stage primaryStage)
	{
 
 
 
		primaryStage.setScene(scene);
		Scene scenE = new Scene(mijnGrid, 400, 250);
		String titelTekst = "WEEE - Periode 1, Les 1";
		primaryStage.setTitle(titelTekst);
    primaryStage.show();
 
 
 
 
		Text scenetitel = new Text(titelTekst);
		scenetitel.setFont(Font.font("Calibri", FontWeight.NORMAL, 30));
    mijnGrid.add(scenetitle, 0, 0, 2, 1);
 
		Label vraag0 = new Label("Gefeliciteerd! Het werkt!");
    vraag0.setFont(Font.font("Arial", FontPosture.ITALIC, 20));
    mijnGrid.add(vraag0, 0, 1); mijnGrid = new GridPane();
 
		for (char karakter : vraag0.getText(toCharArray())) {
			System.out.println(karakter);
		}
 
		System.out.println(vraag0.getText(replace(('!'),(' ') + ("nog niet helemaal"))));
 
 
		Label vraag1 = new Label("Hoe vond je de opdracht?");
		TextField antwoord1 = new TextField();
    mijnGrid.add(vraag1, 0, 2);
		mijnGrid.add(antwoord1, 1, 2);
 
 
 
		Label vraag2 = new Label("Wat vond je lastig?");
		mijnGrid.add(vraag2, 0, 3);
 
		if (vraag0.getText())toCharArray() [0] = 'W';
		{ CheckBox antwoord2A = new CheckBox("Spelling");
			CheckBox antwoord2B = new CheckBox("Interpunctie");
      CheckBox antwoord2C = new CheckBox("Volgorde");
			CheckBox antwoord2D = new CheckBox("Structuur & Layout");
			mijnGrid.add(antwoord2A, 1, 3);
			mijnGrid.add(antwoord2B, 1, 4);
			mijnGrid.add(antwoord2D, 1, 6);
			mijnGrid.add(antwoord2C, 1, 5);
    }
 
		}
 
 
 
	public static void main(String[] args)
	{
 
 
		int getalNummerA = -1;
		String tekstEen = "";
 
 
 
		if (args.length > 0) {
			tekstEen = args[0].toString();
		}
 
 
 
		System.out.println(getalNummerA);
 
		System.out.println("Hallo" + tekstEen);
		boolean magVerder = true;
 
 
		if (magVerder && (getalNummerA == 0 || tekstEen.isEmpty()))
		{
			getalNummerA = Math.round( (20.0f  * (float)Math.random() ));
 
			if (getalNummerA > 0) { launch(args);
 
 
 
		}
 
	}
}
}

errors now:

Opdracht1WEEE.java:47: error: cannot find symbol
                for (char karakter : vraag0.getText(toCharArray())) {
                                                    ^
  symbol:   method toCharArray()
  location: class Opdracht1WEEE
Opdracht1WEEE.java:51: error: cannot find symbol
                System.out.println(vraag0.getText(replace(('!'),(' ') + ("nog niet helemaal"))));
                                                  ^
  symbol:   method replace(char,String)
  location: class Opdracht1WEEE
Opdracht1WEEE.java:64: error: incompatible types: String cannot be converted to boolean
                if (vraag0.getText())toCharArray() [0] = 'W';
                                  ^
Opdracht1WEEE.java:64: error: cannot find symbol
                if (vraag0.getText())toCharArray() [0] = 'W';
                                     ^
  symbol:   method toCharArray()
  location: class Opdracht1WEEE
4 errors

i dont get how i use the replace() and toCharArray().

vraag0.getText().toCharArray();

vraag0.getText().replace("!", " ");