how to access the jbutton that is in the other class?

Question

I got the jbutton in the main class, so I put him in the public room so I could access from another class. but you’re not doing the right thing

public class piscarbt{

 tela t = new tela();
public void piscar(){

    t.jButton1.setBackground(Color.white);

}


}

I made this code and the color of jbutton does not change, remembering that in the main class it ispublic javax.swing.JButton jButton1;

I don’t know what to do

Answer 1

You can leave the button as static:

Private Static JButton btnBotão;

And create a statistical method to call this button:

public static JButton getButton(){ return btnBotao; }

all this in the main class.

In the class you call this button you can call by the statistical method:

Principal.getButton().addActionListener() .... anyway, implements as you wish

Answer 2

Get a button in the main class:

public JButton getBotao() {
return seuBotao;
}

In the other instance class the main:

ClassePrincipal controle = new ClassePrincipal():

And your code will stay that way:

JButton botao = controle.getBotao();
t.botao.setBackground(Color.white);

Try it and give feedback