数组中的JButton不会更新文本

Question

I've created an array of buttons, added them to my frame and (inefficiently) created action listeners for each of them which open a JOptionPane to take an input and add it to a String array, yet the text on the array button does not update after the popup is closed, while a button not part of an array updates its text fine.

The string array grabs the data from the JOptionPane fine, it just wont update the button's caption.

In my full program I'm writing ar_str_vals to a .xml file, and it can properly save and load the array, and surprisingly the array buttons properly set their text but only at the beginning of my program.

package wtf;

    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JOptionPane;

    public class Wtf extends JFrame{
        JButton[] ar_btn_vals = new JButton[2];
        String[] ar_str_vals = new String[2];
        public Wtf(){
        super("Title");
        setLayout(null);
        setSize(300, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        constructor();
        actionlisteners();
        }

public void constructor(){
    for (int x = 0;x<=1;x++){
        ar_btn_vals[x] = new JButton();
        ar_btn_vals[x].setText(ar_str_vals[x]);
        ar_btn_vals[x].setBounds(5,(100 * x)+20, 100,40);
        ar_btn_vals[x].setVisible(true);
        add(ar_btn_vals[x]);
        System.out.println(ar_str_vals[x]);
    }

}

public void actionlisteners(){
    for (int x=0;x<=1;x++){
        switch (x){
        case 0:
                ar_btn_vals[0].addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent evt) {
                        ar_btn_vals0ActionPerformed(evt);
                    }
                });
            break;
            case 1:
                ar_btn_vals[1].addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent evt) {
                        ar_btn_vals1ActionPerformed(evt);
                    }
                });
            break;
        }
    }
}

private void ar_btn_vals0ActionPerformed(java.awt.event.ActionEvent evt) {
    JFrame frm_val0change = new JFrame();
    String newval = JOptionPane.showInputDialog(frm_val0change, "Enter new Button 1 Value");
    ar_str_vals[0] = newval;  
    constructor();
}

private void ar_btn_vals1ActionPerformed(java.awt.event.ActionEvent evt) {
    JFrame frm_val1change = new JFrame();
    String newval = JOptionPane.showInputDialog(frm_val1change, "Enter new Button 2 Value");
    ar_str_vals[1] = newval;  
    constructor();
}

public static void main(String[] args) {
    Wtf frame = new Wtf();
}
    }

I'm aware that this isn't as efficient as it could be, but I've got limited time to finish this and I have absolutely no idea why this isn't working properly.

This is also my first time asking a question, so please have mercy if I've formatted anything wrong.

Answer 1

正如MadProgrammer所说，我要做的就是更新动作侦听器中的按钮文本，而不是再次调用构造函数。