import javax.swing.*;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.BorderLayout;

public class FlowLayoutTest1 extends JFrame{

  public static void main(String[] args){
    FlowLayoutTest1 frame = new FlowLayoutTest1();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 300, 200);
    frame.setTitle("ƒ^ƒCƒgƒ‹");
    frame.setVisible(true);
  }

  FlowLayoutTest1(){
    JButton button1 = new JButton("Button");
    JButton button2 = new JButton("Long Button");
    JButton button3 = new JButton("Bic Size Button");
    button3.setPreferredSize(new Dimension(150, 100));
    JButton button4 = new JButton("a");
    JButton button5 = new JButton("b");

    JPanel p = new JPanel();
    p.setLayout(new FlowLayout());

    p.add(button1);
    p.add(button2);
    p.add(button3);
    p.add(button4);
    p.add(button5);

    getContentPane().add(p, BorderLayout.CENTER);
  }