import javax.swing.*; //for Swing classes import java.awt.*; //for FlowLayout class public class Ex33_FlowWindow extends JFrame { private final int WINDOW_WIDTH = 200; private final int WINDOW_HEIGHT = 105; //constructor public Ex33_FlowWindow() { setTitle("Flow Layout"); //title bar setSize(WINDOW_WIDTH, WINDOW_HEIGHT); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLayout(new FlowLayout()); //setLayout(new FlowLayout(FlowLayout.LEFT, 10, 7)); //alignment, horizontalgap, verticalgap JButton button1 = new JButton("Button 1"); JButton button2 = new JButton("Button 2"); JButton button3 = new JButton("Button 3"); JButton button4 = new JButton("Button 4"); add(button1); add(button2); add(button3); add(button4); setVisible(true); } public static void main(String[] args) { new Ex33_FlowWindow(); } }