JAVA 添加第二个按钮及其 actionListener 后，动作会执行两次

Question

向第二个按钮添加侦听器后，第一个创建的按钮执行两次相同的操作：

public class ControladorTablaMaterial implements ActionListener {


 private VistaTablaMaterial vistaTablaMaterial;
    private JPanel jContentPane = null;
    private JScrollPane scrollPane = null;
    private JTable tablaMaterial;
    private JButton mostrarElementoButton;
    private JButton eliminarElementoButton;
    private ModeloTablaMaterial modeloTablaMaterial;


    public ControladorTablaMaterial(ArrayList<Material> coleccionMaterial, ActionListener listener) {
        String[] cabecera = {"Material", "Titulo"};
        this.vistaTablaMaterial = new VistaTablaMaterial(cabecera, coleccionMaterial);
        setupVistaTablaMAterial(listener);
    }

    private void setupVistaTablaMAterial(ActionListener listener) {
        this.scrollPane = vistaTablaMaterial.getScrollPane();
        this.tablaMaterial = vistaTablaMaterial.getTablaMaterial();
        this.modeloTablaMaterial = vistaTablaMaterial.getModeloTablaMaterial();
        this.mostrarElementoButton = vistaTablaMaterial.getMostrarElementoButton();
        this.eliminarElementoButton = vistaTablaMaterial.getMostrarElementoButton();
        this.initListeners(listener);
    }


    private void initListeners (ActionListener listener) {
        getMostrarElementoButton().addActionListener(listener);
        getEliminarElementoButton().addActionListener(listener);

    }

     @Override
    public void actionPerformed(ActionEvent e) {

    }

}

如果我删除以下行，一切正常：

getEliminarElementoButton().addAtionListener(listener);

但当然我也需要那个按钮被收听。

在侦听器 class 中，在 actionPerformed(actionEvent e) 方法中，我使用以下代码来区分两个按钮：

if (e.getSource().equals(this.getControladorTablaMaterial().getMostrarElementoButton())) {

除了这个框架之外，这似乎工作正常。任何猜测？

题外话：为什么代码缩进在 Whosebug 的编辑器上无法正常工作？

Answer 1

问题出在这些行中：

this.mostrarElementoButton = vistaTablaMaterial.getMostrarElementoButton();
this.eliminarElementoButton = vistaTablaMaterial.getMostrarElementoButton();

你得到的是同一个按钮。

JAVA 添加第二个按钮及其 actionListener 后，动作会执行两次

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