摘要：
Reflection: To obtain meta level information about the program structure itself at runtime. To change the program interpretation or meaning at the run 阅读全文
摘要：
unit tests def High-level testing vs. low-level testing: High-level: system function testing, acceptance testing, … Low-level: unit testing and integr 阅读全文
摘要：
Collection classes Types of collection -Collection -Map ArrayList HashMap Iterator Java Arrays Declaring an array int[] myArray; int[] myArray = new i 阅读全文
摘要：
Polymorphism Polymorphism: Means many (poly) shapes (morph) In OO programming, it means the ability of an object to take on many forms It is an import 阅读全文
摘要：
Errors An Error is any unexpected result obtained from a program during execution. Unhandled errors may manifest themselves as incorrect results or be 阅读全文
摘要：
AWT and Swing Abstract Window Toolkit (AWT): Introduced in Java 1.0 Provides classes and other tools for building programs that have a graphical user 阅读全文