How to hide the JPanel?

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Java

netbeans

i have developed a program and it has a login panel and visa info panel.
visa panel only visible to users if user name and passwords are correct?

but i have tried to hide JPanel,
using setVisible option.
but it wont work. its still visible to everyone.

visaUser.java means my panel

public Visa_Request() {
        initComponents();
        visaUsers.setVisible(false);
    
    }