java – How would I dynamically add swing component to gui on click?

What I am looking to do is a similar principle to adding attachments to emails, you can click a button and a new browse box would open increasing the number of separate attachments you can have.

I’m fairly new so if someone could point me towards an example?

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public static void main(String[] args) {

    final JFrame frame = new JFrame("Test");
    frame.setLayout(new GridLayout(0, 1));

    frame.add(new JButton(new AbstractAction("Click to add") {
        public void actionPerformed(ActionEvent e) {

            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    frame.add(new JLabel("Bla"));

    frame.setSize(400, 300);

java - How would I dynamically add swing component to gui on click?

Sample code to add Buttons on the fly dynamically.

panel.add(new JButton("Button")); 

Full code :

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import java.awt.FlowLayout;
import java.awt.BorderLayout;

public class AddComponentOnJFrameAtRuntime extends JFrame implements ActionListener
JPanel panel;

public AddComponentOnJFrameAtRuntime()
 super("Add component on JFrame at runtime");
 setLayout(new BorderLayout());
 panel=new JPanel();
 panel.setLayout(new FlowLayout());
 JButton button=new JButton("CLICK HERE");

public void actionPerformed(ActionEvent evt)
 panel.add(new JButton("Button"));

public static void main(String[]args)
 AddComponentOnJFrameAtRuntime acojfar=new AddComponentOnJFrameAtRuntime();

Component was not visible until setSize() was called:





Java : Dynamically add swing components

for Example : count=3
//Java Swing: Add Component above method
public void  dya_addcomp(int count)
//Dynamicaly Delete Image_icon
 BufferedImage Drop_Tablefield = null;
 try {
     Drop_Tablefield ="/images/drop.png"));
 } catch (IOException ex) {
     msg(" Error: drop and edit icon on Table, "+ex);
 //count Items:  3 times for loop executed..
 for(int i=0;i<count;i++)
     //lblcount.setText("Count : "+cnt);
     JTextField txtcolnm=new JTextField("",20);
     JComboBox cmbtype=new JComboBox();
     JTextField txtcolsize=new JTextField("",20);

     JButton Drop_Table_Field = new JButton(new ImageIcon(Drop_Tablefield));

     cmbtype.addItem("INTEGER"); cmbtype.addItem("FLOAT");
     cmbtype.addItem("STRING");  cmbtype.addItem("BOOLEAN");

     colnamepanel.add(txtcolnm);   colnamepanel.add(cmbtype);
     colnamepanel.add(txtcolsize); colnamepanel.add(Drop_Table_Field);


     //refresh panel

     //set the layout on Jpanel
     colnamepanel.setLayout(new FlowLayout(FlowLayout.LEFT,5,0));
  }//end for loop
 }//end method