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。-With human beings, like any language, Java provides us with a way to express ideas. If operating properly, when compared with other methods, with the problem has become