exercise2_4.java

java程序设计导论（daniel liang著） 所有偶数课后习题答案

import javax.swing.JOptionPane;

public class Exercise2_4 {
  public static void main(String[] args) {
    // Prompt the input
    String poundString = JOptionPane.showInputDialog(null,
      "Enter a number in pound:",
      "Exercise2_4 Input", JOptionPane.QUESTION_MESSAGE);

    // Convert string to double
    double pound = Double.parseDouble(poundString);
    double kilogram = pound * 0.454;

    System.out.println("It is " + kilogram + " kilograms");

    System.exit(0);
  }
}