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Mathematical Expressions, Algorithms, Flow charts.

A list is an ordered sequence of elements(元素). Indexes of lists start from 1.

Variables, assignment operator, swap values of two variables.

Implement ArrayList Algorithms such as finding a maxium or minimum, computing a sum or average, etc.

You may traverse an ArrayListusing for, for-each, and while loops.

ArrayList vs. Arrays. ArrayList Methods. ArrayList Traversals.

Wrapper Classes allow you to implement conversion between primitive types and the wrapper classess.

Programs can be used to process data to acquire information.

Data and Metadata (数据和元数据). Process data. Extract information from data.