java - 如何在switch case语句中匹配多个输入值？

我需要编写什么代码，以便用户输入7、8或9条狗；在情况6下仍会输出该消息？

int dogs;

dogs = Integer.parseInt(JOptionPane.showInputDialog("How many dogs do you have?"));

switch (dogs)
{
           ...
           ...
           ...
case 4: JOptionPane.showMessageDialog(null,"Four dogs is too many."); break;

case 5: JOptionPane.showMessageDialog(null,"Five dogs means you're a crazy person."); break;

case 6: JOptionPane.showMessageDialog(null,"That is totally unbelieveable.");

default: JOptionPane.showMessageDialog(null,"Invalid input.");

} // end switch

最佳答案

检查一个无效的数字，然后只使用default子句：

if (dogs < 0) {
  JOptionPane.showMessageDialog(null,"Invalid input.");
} else {
  switch(dogs) {
    // ...
  case 5:
    JOptionPane.showMessageDialog(null,"Five dogs means you're a crazy person.");
    break;
  default:
    JOptionPane.showMessageDialog(null,"That is totally unbelieveable.");
    break;
  }
}