AP计算机科学A各模块重难点 

Block A：Java Features  (35–45% AP Exam Weighting) 
-第一单元 (考试占比2.5–5%) •  Variables and Data Types  •  Expressions and Statements  •  Operators  •  Casting  •  Ranges of Variables   

-第三单元 (考试占比15–17.5%) •  Boolean Expressions  •  Compound Boolean Expressions  •  if Statements and Control Flow  •  Nested if statement, extended if statement   

 -第四单元 (考试占比17.5–22.5%) •  while Loops  •  for Loops  •  Nested Iteration     

 Block B：Class and Object  (15–25% AP Exam Weighting) 
-第二单元 (考试占比5–7.5%) •  Objects: Instances of Classes  •  Creating and Storing Objects  •  Void Method/Non-void Method  •  Wrapper Classes: Integer and Double  •  Math Class  •  String   

-第五单元 (考试占比5–7.5%) •  Structure of a Class  •  Writing different types of Methods   

-第九单元 (考试占比5–10%) •  Superclasses and Subclasses  •  Overriding Methods  •  Polymorphism     

 Block C: Array and ArrayList  (20–32.5% AP Exam Weighting)

  -第六单元 (考试占比10–15% ) •  Array Creation and Access  •  Traversing Arrays  •  Algorithms Using Arrays   

 -第七单元 (考试占比2.5–7.5%) •  ArrayList and its Methods  •  Traversing ArrayList  •  Developing Algorithms Using ArrayList  •  Searching and Sorting   

 -第八单元 (考试占比7.5–10%) •  Idea of 2D Array  •  Traversing 2D Arrays     

 
Block D: Recursion 5–7.5% AP Exam Weighting 
-第十单元 (考试占比5–7.5%) •  Understanding of Recursion  •  Recursive Searching and Sorting