java - JButton 不执行任何操作

Question

您好，我有一个 JButton 定义如下:

private JButton btnExp;

private JPanel jpShow = new JPanel();
jpShow.setLayout(null);

btnExp = new JButton("Export");
btnExp.setBounds(100, 250, 120, 25);

jpShow.add(jspTable);
jpShow.add(btnExp);
//Adding Panel to Window.
getContentPane().add(jpShow);

public void actionPerformed(ActionEvent ae) {
    try{
        Object obj = ae.getSource();
        if (obj == btnExp) {
            FileWriter excel = new FileWriter("File.TSV");

            for(int i = 0; i < dtmCustomer.getColumnCount(); i++){
                excel.write(dtmCustomer.getColumnName(i) + "\t");
            }
            excel.write("\n");

            for(int i=0; i< dtmCustomer.getRowCount(); i++) {
                for(int j=0; j < dtmCustomer.getColumnCount(); j++) {
                    excel.write(dtmCustomer.getValueAt(i,j).toString()+"\t");
                }
                excel.write("\n");
            }
            excel.close();
            JOptionPane.showMessageDialog(this, "File Written","Success", JOptionPane.PLAIN_MESSAGE);
        }
    }catch(Exception e){
        System.out.println(e);
    }
}

我试图在用户单击按钮后导出 JTable，但没有任何反应，也没有引发异常。我做错了吗？

Answer 1

您没有正确地将 ActionListener 添加到您的按钮。正确的做法是:

btnExp.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
    // add here the contents in your actionPerformed method
  }
})