import javax.swing.*;
import java.awt.*;
public class exa9_12{
  public static void main(String [] args) {
    JFrame f=new JFrame("JTextFieldС");
    f.setLocation(10,100);
    f.setSize(600,400);  
    f.getContentPane().setLayout(new FlowLayout());
    JTextField tf = new JTextField("");
    tf.setColumns(10);        //ʾ
    f.getContentPane().add(tf);
     JPasswordField pf = new JPasswordField("France");
    pf.setColumns(10);       //ʾ
    f.getContentPane().add(pf);
    f.setVisible(true);
    f.pack();                //ʹԶСʾһı
  }
}
