CODEWITHSUNDEEP
javaswinguser-interfacejframe
Aaron
Aaron

Reputation: 1016

Accessing Components in JFrame from External Class

I am having trouble accessing several components in a JFrame to use their setText("...") method. My main is in a seperate class, because the actual program has many windows that need to be managed at the same time.

public GameWindow() {

    initialize();
    gameFrame.setVisible(true);
}

private void initialize() {     
    gameFrame = new JFrame();

JTextPane gameTextPane = new JTextPane();       // text pane to contain all game text
    gameTextPanel.add(gameTextPane);

And this is my main:

public class GameMain {
    public static GameWindow gW = new GameWindow();
    //I have tried using the code below with various numbers, but the "setText()" method is never available
    gW.getGameFrame().getContentPane().getComponent(x);
}

I am trying to set the text of this from a seperate class, but I can not access the components. Ultimately, the final code should look something like this:

public static void main(String[] args) {

    // make the GUI and initilize
    changeTheText();
}

public static void changeTheText() {
    [CODE TO ACCESS TEXTFIELD].setText("Hello World");
}

I have tried many different methods I've found searching around, but I don't really understand any of them, and none of them still allow me to access the methods I need.

Upvotes: 0

Views: 2732

Answers (2)

DeadlyJesus
DeadlyJesus

Reputation: 1533

Move the declaration of the JTextPane out of the initialize method to make it a parameter so you can acces it anytime from within the class. To make it accessible from another class you can either make it public or add a set method. Like this:

public class GameWindow {
    private JTextPane gameTextPane;
    ...
    private void initialize(){...}
    ...
    public void setText(String s) {
        gameTextPane.setText(s);
    }
}

To change your text from the main class:

gW.setText("This is a cool text");

Upvotes: 1

dratewka
dratewka

Reputation: 2114

Create a setText(String text) method in your GameWindow class. In that method call setText on the components you need to change.

Upvotes: 1

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