?? ex2_2.java
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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("輸入半徑：")); height = Double.parseDouble(JOptionPane.showInputDialog("輸入高度：")); area = Math.PI * radius * radius; volume = area * height; JOptionPane.showMessageDialog(null, "半徑為：" + radius + ", 高度為：" + height + "的圓柱體積是：" + volume); }}?? 快捷鍵說明
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