Dynamically remove Component from JPanel

Question

I am adding and deleting components dynamically in a JPanel. Adding and deleting functionality works fine but when I delete the component it deletes the last component rather than the component to be deleted.

How can I solve this issue?

Answer 1

Interestingly enough I am coming across the same issue and I am surprised people are upvoting the other answer, as he is clearly asking about dynamically created Components, not components already created under a variable name which is obtainable, instead of anonymously created objects.

The answer is pretty simple. Use getComponents() to iterate through an array of components added to the JPanel. Find the kind of component you want to remove, using instanceof for example. In my example, I remove any JCheckBoxes added to my JPanel.

Make sure to revalidate and repaint your panel, otherwise changes will not appear

Component is from java.awt.Component.

//Get the components in the panel
Component[] componentList = panelName.getComponents();

//Loop through the components
for(Component c : componentList){

    //Find the components you want to remove
    if(c instanceof JCheckBox){

        //Remove it
        clientPanel.remove(c);
    }
}

//IMPORTANT
panelName.revalidate();
panelName.repaint();

Answer 2

Using the method Container.remove(Component), you can remove any component from the container. For example:

JPanel j = new JPanel();

JButton btn1 = new JButton();

JButton btn2 = new JButton();

j.add(btn1);

j.add(btn2);

j.remove(btn1);