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java集合框架------Collection接口，List接口与实现类，Set接口与实现类

导语对于多个同一类型的数据进行存放和处理时，相信很多人想到的第一个方法就是使用数组，但是数组的使用有非常多的局限性，比如长度不够啦，增删操作需要移动多个元素啦。对于此种问题，采用集合才是最好的解决办法，由于java语言对数据结构进行了封装，我们只需要在java已有的集合框架中选择对我们问题最合适的类...

java中集合类中Collection接口中的List接口的常用方法熟悉

1：集合类，在java语言中的java.util包提供了一些集合类，这些集合类又被称作容器。 2：区别集合类和数组。（1）数组的长度是固定的，集合的长度是可变的。（2）数组是用来存放基本数据类型的，集合是用来存放对象的引用。 3 : 常用的集合有List集合，Set集合，Map集合。其中List集合...

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