one.java

《A first book of java》by Gary J.Bronson 北大出版社

import javax.swing.*;
public class One
{
  public static void main(String[] args)
  {
    String s1, outMessage;
    
    double firstnum, secnum;

    s1 = JOptionPane.showInputDialog("Enter a number:");
    firstnum = Double.parseDouble(s1);
    s1 = JOptionPane.showInputDialog("Great! Please enter a second number:");
    secnum = Double.parseDouble(s1);

    Two.findMaximum(firstnum, secnum); // the method is called here

    System.exit(0);
  }
} // end of first class