import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class Main {
JFrame f = new JFrame();
Container c;
JButton btn;
JTextField tf;
public Main() {
f.setBounds(50, 50, 300, 300);
c = f.getContentPane();
c.setLayout(new FlowLayout());
btn = new JButton("OK");
tf = new JTextField(20);
c.add(btn);
c.add(tf);
f.setVisible(true);
f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
}
public static void main(String[] val) {
new Main();
}
}