ex2_2.java

Introduction to java programming 一书中所有编程练习部分的源码

import javax.swing.JOptionPane;

public class EX2_2 {

    public static void main(String[] args) {
        double radius, height;
        double area, volume;

        radius = Double.parseDouble(JOptionPane.showInputDialog("输入半径："));
        height = Double.parseDouble(JOptionPane.showInputDialog("输入高度："));

        area = Math.PI * radius * radius;
        volume = area * height;

        JOptionPane.showMessageDialog(null, "半径为：" + radius + 
                                            ", 高度为：" + height + 
                                            "的圆柱体积是：" + volume);
    }
}