Introduction to Java and Android 2-boring and whining

After the failure of the interview on the previous trip, today to talk about java! In fact, we used more Android APIs in the mainstream Android development process, and really didn't use Java much, but a building to build, and finally a strong foundation!

Currently our most commonly used Java API documentation is JDKAPI1.6 This version, this document has a lot of csdn! Environment construction I will not say, the main purpose of this article is to introduce the Java

First of all we do not pay attention to things, and sometimes will be directly in the written examination to!

OOA: Object-oriented Analysis

OOD: Object-oriented design

OOP: Object-Oriented Programming

So, AOP or something, you should know what it is!

In Java, do not separate arrays from the array type to understand, then we should pay attention to:

It is defined as: Type[]arrayname and I write the most C language there is a certain difference:

C:int a[10] and java:int [] a = new int [10]

So how does it work in memory?

The object-oriented features we often talk about, though mentioned above, have not been summed up.

After understanding the object-oriented knowledge point, we want to know the class, but in Java has a variety of packages, so in different classes to reference other classes, then we need to understand the qualifier.

These two large chunks are often asked during an interview, so be sure to remember!

This is the class of some knowledge point, the following will be I in Java according to code to analyze Java, in this process, I also in the process of learning gradually, so inevitably some mistakes it, so I hope you don't mind!

Introduction to Java and Android 2-boring and whining