from javax.swing import JButton, JFrame
from javax.swing import UIManager as UIManager
from java.lang import System as JavaSys
from java.lang import Runtime
from net.miginfocom.swing import MigLayout

UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel")

frame = JFrame('Hi There!!!',
            defaultCloseOperation = JFrame.EXIT_ON_CLOSE,
            size = (300, 300)
        )
frame.layout = MigLayout()

def change_text(event):
    button.text = "Button Pressed!"

def start_terminal(event):
    process = Runtime.getRuntime.exec("gnome-terminal")

def stop_terminal(event):
    process.destroy()

button = JButton('Click Me!', actionPerformed=change_text)
button2 = JButton("Start", actionPerformed=start_terminal)
button3 = JButton("Stop", actionPerformed=stop_terminal)
frame.add(button, "w 100px, h 32px, wrap")
frame.add(button2, "w 100px, h 32px, wrap")
frame.add(button3, "w 100px, h 32px, wrap")
frame.visible = True