Here is an example that displays three buttons and display another frame when they are clicked.

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class MultipleFrame{

public static void main(String[] args){
JFrame f = new JFrame("");
f.setLayout(new FlowLayout());
JButton button1=new JButton("Fruit");
Icon icon1 = new ImageIcon("c:/fruit.png");
JButton button2=new JButton("Bird");
Icon icon2 = new ImageIcon("c:/bird.png");
JButton button3=new JButton("Animal");
Icon icon3 = new ImageIcon("c:/animal.png");
button1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
 JFrame f1=new JFrame("Mango");
 Icon icon = new ImageIcon("c:/mango.jpg");
 JLabel lab=new JLabel();
 lab.setIcon(icon);
 f1.add(lab);
 f1.setVisible(true);
 f1.setSize(300,300);
 }
});
button2.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
 JFrame f1=new JFrame("Peacock");
 Icon icon = new ImageIcon("c:/peacock.jpg");
 JLabel lab=new JLabel();
 lab.setIcon(icon);
 f1.add(lab);
 f1.setVisible(true);
 f1.setSize(500,300);
 }
});
button3.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
 JFrame f1=new JFrame("Giraffe");
 Icon icon = new ImageIcon("c:/giraffe.jpg");
 JLabel lab=new JLabel();
 lab.setIcon(icon);
 f1.add(lab);
 f1.setVisible(true);
 f1.setSize(300,300);
 }
});
f.add(button1);
f.add(button2);
f.add(button3);

f.setSize(300,150);
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

In the previous code, we forget to add an icon to button. So we are sending the updated code.

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class MultipleFrame{

public static void main(String[] args){
JFrame f = new JFrame("");
f.setLayout(new FlowLayout());
JButton button1=new JButton("Fruit");
Icon icon1 = new ImageIcon("c:/fruit.png");
button1.setIcon(icon1);
JButton button2=new JButton("Bird");
Icon icon2 = new ImageIcon("c:/bird.png");
button2.setIcon(icon2);
JButton button3=new JButton("Animal");
Icon icon3 = new ImageIcon("c:/animal.png");
button3.setIcon(icon3);
button1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
 JFrame f1=new JFrame("Mango");
 Icon icon = new ImageIcon("c:/mango.jpg");
 JLabel lab=new JLabel();
 lab.setIcon(icon);
 f1.add(lab);
 f1.setVisible(true);
 f1.setSize(300,300);
 }
});
button2.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
 JFrame f1=new JFrame("Peacock");
 Icon icon = new ImageIcon("c:/peacock.jpg");
 JLabel lab=new JLabel();
 lab.setIcon(icon);
 f1.add(lab);
 f1.setVisible(true);
 f1.setSize(500,300);
 }
});
button3.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
 JFrame f1=new JFrame("Giraffe");
 Icon icon = new ImageIcon("c:/giraffe.jpg");
 JLabel lab=new JLabel();
 lab.setIcon(icon);
 f1.add(lab);
 f1.setVisible(true);
 f1.setSize(300,300);
 }
});
f.add(button1);
f.add(button2);
f.add(button3);

f.setSize(300,150);
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}