multiplynumbers.java

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

import java.io.*;   // needed to access input stream classes
public class MultiplyNumbers
{
  public static void main (String[] args) 
  throws java.io.IOException
  {
    String s1;
    String s2;
    double num1, num2, product;
    // set up the basic input stream
      // needed for conversion capabilities  
    InputStreamReader isr = new InputStreamReader(System.in);
      // needed to use ReadLine()
    BufferedReader br = new BufferedReader(isr);
     
    System.out.print("Enter a number: ");
    s1 = br.readLine();
    num1 = Double.parseDouble(s1);
     
    System.out.print("Great! Now enter another number: ");
    s2 = br.readLine();
    num2 = Double.parseDouble(s2);
     
    product = num1 * num2;   
    System.out.println(num1 + " times " + num2 + " is " + product);
  }
}