用Java将一类的char数组发送到另一类的可观察列表时出现问题

Question

I am new to Java and I am trying to send a string / array generated in one class to another to be used in an observable list. Basically I want the string in one class sent to the other class as a char array to an observable list so the letters can be presented in a tile like format in the GUI.

This is my first class:

public class Phrase {

    String gamePhrase = "Keep moving forwards";
    String guessPhrase = gamePhrase.replaceAll("[a-zA-Z0-9]", "*"); 

    char[] array = guessPhrase.toCharArray();

}

This is my second class where I Am trying to add add the characters to:

private ObservableList<Node> phraseList;

private Phrase p1 = new Phrase();

private void start() {

    phraseList.clear();
    for (p1.toCharArray()) {
        phraseList.add(new LetterBoxes(c));
    }
}


private static class LetterBoxes extends StackPane {
    private Rectangle bg = new Rectangle(40, 60);
    private Text text;

    public LetterBoxes(char x) {
        bg.setFill(x == ' ' ? Color.DARKSEAGREEN : Color.WHITE);
        bg.setStroke(Color.BLUE);

        text = new Text(String.valueOf(x).toUpperCase());
        text.setFont(DEFAULT_FONT);
        text.setVisible(false);

        setAlignment(Pos.CENTER);
        getChildren().addAll(bg, text);
    }
}

I am not sure how to get the array in correctly and am having difficulty moving forward. Any help would be amazing!

Answer 1

for (p1.toCharArray()) {

is wrong for 2 reasons:

1. The Phrase class does not provide a toCharArray method.
2. The syntax of the for loop is wrong.

you probably need a getter for the array in the Phase class and use a enhanced for loop:

public class Phrase {

    public char[] getArray() {
        return array;
    }

    ...

}

for (char c : p1.getArray()) {

Answer 2

I think you are french no? Ce tombe bien, moi aussi ! But something are really wrong I guess like that:

for(p1.toCharArray())

I don't know what you want to do but I don't think it works.

So first, you have to pass your variable in the class "phrase" in private, and build some getters-setters:

public class Phrase {
private String gamePhrase = "Keep moving forwards";
private String guessPhrase = gamePhrase.replaceAll("[a-zA-Z0-9]", "*"); 
private char[] array = guessPhrase.toCharArray();

public void setGamePhrase(String s){
    gamePhrase = s;
}
public void setGuessPhrase(String s){
    guessPhrase = s;
}
public void setArray(Char[] s){
    array = s;
}
public String getGamePhrase(){
    return gamePhrase;
}
public String getGuessPhrase(){
    return guessPhrase;
}
public char[] getArray(){
    return array;
}
}

With that you will be able to set and get your data correctly. Then, on your other class, you can do

private Phrase p1 = new Phrase();
private void start() {

    phraseList.clear();
    for (int i=0; i<p1.getArray().size(); i++) { //Perhaps it's something else than .size(), but the idea is that you take the size of array
        phraseList.add(new LetterBoxes(p1.getArray().get(i))); // Here is the same thing, perhaps it's not get(i), but the idea is that you take the value which is associate to the rank i in array.
     }
}
public LetterBoxes(char x) {...}//don't change this function

Hope it will help you,

don't hesitate to answer me