Disabling remaining Buttons, On Click of one button

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Java

Swing

i have small problem while disabling/enabling buttons in Swing Application. It's very basic problem, but I'm new to this concept.

I have a requirement like, having 2 buttons to perform 2 individual operations.

1)While Running initially B1 & B2 Should be Visible/Enabled.

2)If B1 Clicked, then B2 should be disabled/Invisible. After B1 work Completed, then Both B1 & B2 Should be Visible/Enabled.

3)If B2 Clicked, then B1 should be disabled/Invisible. After B2 work Completed, then Both B1 & B2 Should be Visible/Enabled.

But, my problem, is, after processing B1/B2 SetEnable/SetVisible is working.

It should be disabled before start and enabled after completing task

Can anyone help in this case?

Below is my Code...

import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.WindowConstants;

public class FinCSV implements ActionListener {

JFrame frame = new JFrame("ICON");
JPanel panel = new JPanel(new GridLayout(2, 1, 4, 4));
JButton primaryButton = new JButton(" Primary Process");
JButton secondaryButton = new JButton(" Secondary Process");

public static void main(String[] args)
        throws Exception {
    FinCSV msql = new FinCSV();
    msql.initGUI();
}

public void initGUI() {
    this.primaryButton.setActionCommand("Primary");
    this.secondaryButton.setActionCommand("Secondary");
    this.primaryButton.addActionListener(this);
    this.secondaryButton.addActionListener(this);

    this.primaryButton.setFont(new Font("Serif", Font.BOLD, 22));
    this.secondaryButton.setFont(new Font("Serif", Font.BOLD, 22));

    panel.add(this.primaryButton);
    panel.add(this.secondaryButton);
    frame.setContentPane(panel);
    frame.setSize(650, 300);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e) {

    if (e.getActionCommand().equals("Primary")) {
         secondaryButton.setVisible(false);
   // secondaryButton.setEnabled(false);
        for (int i = 0; i < 10000; i++) {
            System.out.println("[ " + (i + 1) + " ] Inside Primary Process");
        }
          secondaryButton.setVisible(true);
   // secondaryButton.setEnabled(true);
    } else if (e.getActionCommand().equals("Secondary")) {
        primaryButton.setVisible(false);
   // primaryButton.setEnabled(false);
        for (int i = 0; i < 10000; i++) {
            System.out.println("[ " + (i + 1) + " ] Inside Secondary Process");
        }
        primaryButton.setVisible(true);
   // primaryButton.setEnabled(true);
    }
}
}