java的文本字段[Java编程]

//: TextField1.java
// Using the text field control
import java.awt.*;
import java.applet.*;

public class TextField1 extends Applet {
  Button
    b1 = new Button("Get Text"),
    b2 = new Button("Set Text");
  TextField 
    t = new TextField("Starting text", 30);
  String s = new String();
  public void init() {
    add(b1);
    add(b2);
    add(t);
  }
  public boolean action (Event evt, Object arg) {
    if(evt.target.equals(b1)) {
      getAppletContext().showStatus(t.getText());
      s = t.getSelectedText();
      if(s.length() == 0) s = t.getText();
      t.setEditable(true);
    }
    else if(evt.target.equals(b2)) {
      t.setText("Inserted by Button 2: " + s);
      t.setEditable(false);
    }
    // Let the base class handle it:
    else 
      return super.action(evt, arg);
    return true; // We've handled it here
  }
} ///:~