java 8 complete reference

1, the computer's memory unit The data in the computer is represented by 0 and one, and one of the 0 or 1 is called a bit. 8 bits are called a byte (byte), two bytes are called a word (word), and four bytes are called two-word (Dword). 1byte=8bit, 1kb= 1024 Byte, 1m=1024 KB. 2, Java has four categories of 8 basic types A, 4 kinds of integral type BYTE 1 byte Shor

Java 8 New Attribute method reference For reference we are generally used in objects, and object references are characterized by: different reference objects can manipulate the same piece of content! The Java

Java 8 new features-4 method reference, new features-4 ForReferenceIn general, we use the object, and the characteristics of object reference are:Different referenced objects can operate on the same content.! Java 8 method

What is a method referenceSimply put, it is a lambda expression. In Java 8, we use lambda expressions to create anonymous methods, but sometimes our lambda expressions may simply invoke an existing method without doing anything else, and in that case it would be clearer to refer to the existing method by a method name, Java The

the right person.comparebyage (A, B) method has defined the input and output.Therefore, the above code can be simplified as follows:Method reference notationArrays.sort(rosterAsArray, Person::compareByAge);Several typesMethod reference are available in the following categories: Reference static method: Classname::staticmethodname

1 What is a method reference (methods references)Java 8 adds a familiar but unfamiliar symbol::. You might see this code.System.out::p rintlnis actually a method reference (methods references). Since Java 8 also takes the method/f

The double-colon operator is a method reference in Java, and the method references the format of the class Name:: Method name.This is only the method name, and the method name is not followed by the parentheses "()". --------> Such a formula does not necessarily call this method. This is generally used as a lambda expression, and lambda has the so-called lazy load, not parentheses that is, to see how the me

Computed observables Reference Calculation Monitoring Property ReferenceThe following document describes how to construct and use the computed monitoring properties.Constructing a computed ovservable construction calculation monitoring propertiesA computed monitoring property can be constructed in any of the following ways:　　　　1. ko.computed (evaluator [, TargetObject, Options]) --This is the most common way to create a calculated monitoring attribute

complete path .: 'Union select 1 from thisafakename. faketable % 00 Returns the ASCII value of a character. ASC () function: 'Union select ASC ('A') from validtable % 00: Returns the ASCII value of 65 ('A) Convert ASCII values to characters CHR () function: 'Union select CHR (65) from validtablename % 00: 'A' is returned' If statement You can use

final variable in the parameter. In terms of syntax, Java 8 does not require that the external reference parameter be final, but the semantics is still final. This is similar to the anonymous internal class. In addition, this pointer must be a pointer to the outer class. The lamda expression does not have this. Now java