app15_12.java

JAVA 2面向对象程序设计(随书范例程序)13-15.rar

// app15_12, TextField的应用
import java.awt.*;
public class app15_12 extends Frame
{
   static Frame frm=new Frame("TextFile class"); 
   static TextField txf1=new TextField("TextField Demo");
   static TextField txf2=new TextField("Editable");
   static TextField txf3=new TextField("password");
  
   public static void main(String args[])
   {
      frm.setSize(200,150);
      frm.setLayout(null);
      frm.setBackground(Color.yellow);
      txf1.setBounds(20, 40,120,20);
      txf2.setBounds(20, 70,120,20);
      txf3.setBounds(20,100,120,20);
      txf1.setEditable(false);    // 设置txf1为不可编辑
      txf3.setEchoChar('*');      // 设置txf3的回应字符为'*'
      frm.add(txf1);
      frm.add(txf2); 
      frm.add(txf3); 
      System.out.println(txf1.getText()); 
      System.out.println(txf2.getText()); 
      System.out.println(txf3.getText());
      frm.setVisible(true); 
   }
}