无法生成JTextField ActionListener

Question

我正在尝试添加ActionListener一个JTextField并将该文本字段作为动作侦听器本身.每当我这样做,我都会收到错误,说

The method addActionListener(ActionListener) in the type JTextField is not applicable for the arguments (JTextField)

码

String strBox1;

JTextField textBox1, textBox2, textBox3;

JTextArea textArea1, displayArea;

public textBoxes()
{       

    setLayout (new GridLayout(10,2));

    JLabel query1 = new JLabel("Daily Savings:");
    add(query1);
    textBox1 = new JTextField("Dsave", 5);
    add(textBox1);
    textBox1.addActionListener(textBox1);
    //textBox1.getDocument().addDocumentListener(new MyDocumentListener());

    JLabel query2 = new JLabel("Current Age:");
    add(query2);
    textBox2 = new JTextField("Cage", 5);
    add(textBox2);

    JLabel query3 = new JLabel("Initial Savings amount:");
    add(query3);
    textBox3 = new JTextField("ISA", 5);
    add(textBox3);

    JLabel query4 = new JLabel("Age of Retirement:");
    add(query4);
    JTextField textBox4 = new JTextField("AoR", 5);
    add(textBox4);

    JLabel query5 = new JLabel("Annual Retirement Income:");
    add(query5);
    JTextField textBox5 = new JTextField("ARI", 5);
    add(textBox5);

    JLabel query6 = new JLabel("Life Expectancy:");
    add(query6);
    JTextField textBox6 = new JTextField("LR", 5);
    add(textBox6);

    JLabel query7 = new JLabel("Interest Rate on Return of Savings:");
    add(query7);
    JTextField textBox7 = new JTextField("IRoRoS", 5);
    add(textBox7);

    JLabel query8 = new JLabel("Inflation %:");
    add(query8);
    JTextField textBox8 = new JTextField("I%", 5);
    add(textBox8);
}


class MyDocumentListener implements DocumentListener 
{
    public void insertUpdate(DocumentEvent e) {

    }
    public void removeUpdate(DocumentEvent e) {
        System.out.println("change -" + e);
    }
    public void changedUpdate(DocumentEvent e) {
    }
}

class MyTextActionListener implements ActionListener {

    public void actionPerformed(ActionEvent e) {

    }
}
}

Answer 1

基本上,JTextField没有实现ActionListener界面,所以你不能做你正在尝试的.

您需要提供有效的ActionListener实现.

有关更多详细信息,请参见如何编写动作侦听器