Colocar botao

import javax.swing.JFrame;

import javax.swing.JButton;

import java.awt.Toolkit;

import java.awt.Dimension;

import java.awt.Container;

import java.awt.FlowLayout;

public class Nflow {

// The window object

static JFrame aWindow = new JFrame(“This is a Flow Layout”);

public static void main(String[] args) {

Toolkit theKit = aWindow.getToolkit(); // Get the window toolkit

Dimension wndSize = theKit.getScreenSize(); // Get screen size

// Set the position to screen center & size to half screen size

aWindow.setBounds(wndSize.width/4, wndSize.height/4, // Position

wndSize.width/2, wndSize.height/2); // Size

aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

FlowLayout flow = new FlowLayout(); // Create a layout manager

Container content = aWindow.getContentPane(); // Get the content pane

content.setLayout(flow); // Set the container layout mgr

// Now add six button components

//for(int i = 1; i <= 6; i++)

content.add(new JButton("Press " ));// Add a Button to content pane

aWindow.setVisible(true); // Display the window

}

}