Java outline of the review

Java outline of the review

 

1. Basic data types
   • Understand the basic data structure java int, float, double, long, long long, char.
   • Understand the use of java primitive type wrapper classes Integer, Double, Float, String, etc., focusing on attention to the String class method
   • Understand the use of java arrays, including creating, initializing, use
   • Java understand the operators and their usage
   • Preliminary basic console IO, using Scanner and System.out
2. Program Structure
   • The basic structure and selected using a multi-branch structure
   • Using a switch statement
   • and while for, for-each loop
   • Status of programming methods (functions)
   • Recursive programming to understand and grasp the meaning of the advantages and disadvantages
   • Understanding Scope and survival, and proficiency in the use of static const keyword and final
3. Object-Oriented
   • Understanding the meaning of object-oriented
   • Define a class to create an object
   • Constructor of the class
   • Overloaded class methods
   • Master the inheritance mechanism
   • Grasp the role of static in class
   • Meaning cited
   • Abstract classes to create an interface, there is a mind
4. Exception Handling
   • Master understanding try-catch block
   • The throw and the throws
   • Throwable master interface
   • Familiar with common exception classes
5. Binary IO

   • Familiar with and master class structure diagram javaIO flow

     
     
     
   • Familiar interface for each class to achieve, what features, how to initialize with the scene at what
     content to view the document jdk to
   • Master the understanding and use of the object IO interface Serializable
   • Master the use of a random file reading and writing classes
6. Generic (template)
   • Generic motives and advantages, why use generics, what strengths?
   • How to define a generic class and interfaces, familiar with the generic class definition syntax interface, understand a class may have multiple generic parameters
   • How to define the generic method is called, you can understand a static method is defined as a generic method
   • Learn generics wildcard, wildcard understanding unrestricted, restricted wildcard, meaning lower limit of the Wild
   • Understand how to deal with generics at runtime, there is only the generic understanding of the build process, and understand some of the resulting restrictions on generics
     • You can not create an instance of a generic type parameter
     • You can not be used to create an array of generic type
     • In a static context does not allow class is a generic parameter
     • Exception type can not be generic

7. java collections
   java collections following structure

   
   
   
   • collection interface extends Iterator, it is iterative, and its subclasses are also iterable
   • Familiar with and master the method of collection
   • The method of linear form List interface, and the characteristics of the different subclasses of LinkedList ArrayList
   • Static methods familiar collections for the linear form
   • Vector and Vector Stack and Stack
   • Queue and Queue priority queue and PriorityQueue
   • Collection, understand and grasp the difference between the use HashSet \ LinkedHashSet \ TreeSet of
   • Mapping, master understanding HashMap \ linkedHashMap \ TreeMap using the difference
8. Multithreading
   • Java appreciated that in use the Thread class interface runable
   • Familiar with and master the steps two ways to create multi-threaded programs
     • New class inheritance Thread
     • New class implements runnable interfaces
   • Familiar with and master the method of Thread
   • Familiar with and master thread pool usage
   • Grasp the meaning and understanding thread synchronization method
     • Use keywords to synchronize the code lock, synchronization method invocation on an object, the object needs to be locked, call the static synchronization method of a class, you need to lock this class. It may also be synchronized directly locked by an object, the synchronized block
     • Explicit use locking mechanism
     • Use blocking queue
     • Use semaphores
     • Understand and grasp the thread state transition diagram
     • Understand and grasp the synchronized version of the collection for multi-threaded