创建一个类并将其扩展到 JButton，如下所示，您可以在那里更改与 JButton 相关的所有类型.

create a class and extend it to JButton like below and there you can change all sort of things that has to do with JButton.

import javax.swing.JButton;

public class CustomJButton extends JButton {

    public CustomJButton() {
        this.setText("Custom JButton");
        // initialize
    }

    // add your own methods or override JButton methods
    public void myFunc(){

    }
}