Why Isn't My JTable Showing Up in My JFrame?

JTable Not Appearing in JFrame: Resolving the Issue

In the provided code snippet, the JTable is not visible due to an incorrect layout manager setting.

Original Problem:

The code calls setLayout(null); on the JFrame, which disables all layout managers. This results in the JTable not being automatically placed or sized within the JFrame.

Solution:

To resolve this issue, replace setLayout(null); with an appropriate layout manager, such as BorderLayout, GridLayout, or BoxLayout. This will allow the JTable to be added and displayed correctly.

Improved Code:

public class accCreator extends JFrame {
    // Use a BorderLayout for easy component placement
    private JPanel main;
    private JTable tbl_Accounts;
    // ...

    public accCreator() {
        super("Account Manager");
        // Use a BorderLayout
        setLayout(new BorderLayout());

        // Create and add JTable to the center
        tbl_Accounts = new JTable(data, columnNames);
        JScrollPane scrollPane = new JScrollPane(tbl_Accounts);
        add(scrollPane, BorderLayout.CENTER);

        // ...
    }
    // ...
}

With this change, the JTable should now appear in the JFrame as expected.

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