appgraphinout.java

针对越来越多的用户喜欢JAVA

import java.awt.*;
import java.awt.event.*;
public class AppGraphInOut
{
  public static void main ( String args[] )
  {
    new AppFrame();
  }
}

class AppFrame extends Frame implements ActionListener
{
  TextField in = new TextField(6);
  Button btn = new Button("确定");
  Label out = new Label("                                 ");
  public AppFrame()
  {
    setLayout(new FlowLayout());
    add( in );
    add( btn );
    add( out );
    btn.addActionListener(this);
    setSize( 400,100 );
    show();
  }
  public void actionPerformed( ActionEvent e)
  {
    String s = in.getText();
    double d = Double.parseDouble( s );
    double q = d * d * d;
    out.setText( d+"的立方是："+ q);
  }
}