同人类任何语言一样，Java为我们提供了一种表达思想的方式。如操作得当，同其他方式相比，随着问题变得愈大和愈复杂，这种表达方式的方便性和灵活性会显露无遗。-Like any human language, Java provides us with a way of expression. If the operation is properly compared with other means, as the issues become larger and more complex, the expression of the convenience and flexibility will be shown.