java se 8 programmer 1

Use super and this to access objects and constructors Use abstract classes and interfaces Handling Exceptions Differentiate among checked exceptions, unchecked exceptions, and Errors Create a try-catch block and determine how to exceptions alter normal program flow Describe the advantages of Exception handling Create and invoke a method that throws an exception "Recognize common exception classes (such as NullPointerException, Arithmeticexcpetion, arrayinde

DriverManager class including the JDBC URL Submit queries and read results from the database including creating statements, returning result sets, iterating through The results, and properly closing result sets, statements, and connections Localization Describe the advantages of localizing an application Read and set the locale by using the locale object Create and read a Properties file Build A resource bundle for each locale and load a resource bundle in an appli

, Java virtual machines can better support the use of JavaScript code.Finally, I'll cover features that few people know about, such as new ways to add strings to lists and other features that can help you with your daily tasks.For more Java SE 8 features and guidelines, I recommend you refer to the Http://docs.oracle.c

----Java SE Basics Review1. Break in a looping statement terminates all loops, jumps out of the loop body, and continue terminates the loop, jumping to the next loopThe 2.return statement has two functions: return value; End method Run3. For object-oriented understanding in Java: Organize the code as a class and encapsulate the data as an object. Classes are equi

an abstract class and an interface?(1) Abstract classes need to be inherited, and can only be inherited. Interface needs to be implemented, and can be implemented more, that is, to implement multiple interfaces(2) Abstract classes can be defined abstract methods and non-abstract methods, subclass inheritance can directly invoke non-abstract methods, the interface can only define abstract methods (that is, all of the interfaces are not implemented met

Lambda expressions are a core feature of Java SE 8, and most of the improvements are spread around lambda expressions. (The jigsaw project has been postponed to Java SE 9.) The contents of the lambda expression are described in the previous article. This article focuses on e

*/ A Public classDemo02 { - - Private Static FinalString FilePath = "G:\\idea\\src\\com\\itheima05\\test_javase\\test_20171214\\word.txt"; the - Public Static voidMain (string[] args)throwsException { - -String contents =NewString (Files.readallbytes (Paths.get (FilePath)), standardcharsets.utf_8); + -string[] ws = Contents.split ("\\pl+"); + //Convert an array to a collection Alistarrays.aslist (WS); at //using Flow - //stream - //The Long Count (

Computer System: Windows 8 Here we will introduce three versions of the java platform: Java SE -- Java Standard Edition, Java Standard Edition, is mainly used for table-level application and database development.

Now only to understand java8, is not after the understanding of the point?New programming techniques, individuals do not like the first time to follow up.Is it more cost-effective to have practice in the community?A little shrewd Consideration. Not much to say, on the Code.Read the note code for "java se 8" for busy people//i hope you're too busy to read this boo

The Java SE 8 has been fully functional in the June 13 version. In these new features, lambda expressions are the most important new features that drive the release of this release. Because Java first tried to introduce the relevant content of functional programming. The community has also been looking forward to lambd

1. Three basic features of object-oriented programming: Inheritance (inheritence), Encapsulation (encapsulation), polymorphism (polymorphism)2. Encapsulation: Classes contain data and methods, and the data and methods in a class constitute the encapsulation3. How to define a class:The name of the Modifier class class{The contents of the class (including properties and methods)}4. Method: How to define a methodModifier returns the type method name ([pa

Constant:A constant is an identifier whose value is constant during run time, and constants can only be referenced in the program and cannot be re-assigned.Naming rules for constants:1. In Java, adding the final keyword to a variable declaration represents a constant, and adding the static keyword represents a class variable. The General union declares a variable;2. Try to use the represented meaning intuit

, and super refers to a reference to the parent classe) The Super keyword must be the first line statement in the constructor method.13. Method override (Override): Also called overwrite, the subclass is the same as the method return type of the parent class, the method name is the same as the parameter, so we say that the child class and the parent class's methods constitute an overriding relationship.14. Method overrides relationship to method overloads: Overloads two or more methods that occu

1. Java Basic Data typeint 4 max 0x7fffffff 2147483647=2 31 square-1 first bit symbol bit minimum -2147483648 0x80000000 complement store first constant other bit reverse plus 1Short 2 max 2^15-1 32767 min -2^15-32768Long 8 maximum 2^63-