atonement object lesson

;}intDemo_add (demo* pThis,intvalue) { structclassdemo* obj = (structclassdemo*) PThis; returnObj->mi + OBJ-GT;MJ +value;}// DestructorsvoidDemo_free (demo*pThis) { Free(pThis);}Main.c#include #include"50-2.h"intMainvoid) {Demo* d = demo_create (1,2);//demo* d = new Demo (1, 2); //in each function call, pass the This pointer: Dprintf"D.MI =%d\n", Demo_geti (d));//D->geti ();printf"D.MJ =%d\n", DEMO_GETJ (d));//D->GETJ ();printf"ADD (3) =%d\n", Demo_add (D,3));//D->add (3); //D->mi = +;//e

(); Jdk1.6offerfrist () offerlast (); JDK1.5 before Getfrist (); Gets the first element (not deleted), if link is empty, throws a Nosuchelementexception exception getlast (); Jdk1.6peekfrist (): Gets the first element (not deleted) if link is empty, return nullpeeklast (); Jdk1.5removefrist (): Gets the first element and deletes if link is empty, throws Nosuchelementexception exception Removelast (): Jdk1.6pullfrist (): Gets the first element and deletes it, If link is empty, return Nullpulllas

is:" +mess);} }2) "some attention points of the class"A) "import statement"--"location" If the source file contains an import statement, it should be placed between the package statement and the class Definition. If there is no package statement, the import statement should be first in the source File.--the "scope" Import Statement and the package statement are valid for all classes defined in the source File. In the same source file, you cannot give different package declarations to differen

the E-containerThe object (it) must be dependent on the container for the element to be fetched, because the data structure of each container is different, so the iterator object must be implemented inside the container, and for the container holder, the implementation is unimportant, as long as the object of the iterator to the implementation is obtained throug

("span"). AddClass ("MyClass1"). End (). addclass ("MyClass2")3) $ ("P"). FIND ("span"). AddClass ("MyClass1"). Andself (). addclass ("MyClass2")A: 1) in all P tags, find the span tag for them plus the MYCLASS1 style, plus the MYCLASS2 style2) in all P tags, locate the span tag for them with the MyClass1 style, and then return to the previous object $ ("P"), and add the MyClass2 style to all P tags3) in all P tags, locate the span tag to add the MyCl

("span"). AddClass ("MyClass1"). End (). addclass ("MyClass2")3) $ ("P"). FIND ("span"). AddClass ("MyClass1"). Andself (). addclass ("MyClass2")A: 1) in all P tags, find the span tag for them plus the MYCLASS1 style, plus the MYCLASS2 style2) in all P tags, locate the span tag for them with the MyClass1 style, and then return to the previous object $ ("P"), and add the MyClass2 style to all P tags3) in all P tags, locate the span tag to add the MyCl

What is a class and what is an object? How do I define a class? How do I define an object?First, to define a human　　class person{ public: void getweight (); void setweight (); Private: int weight; };Declare a human with the class keyword. Now just declaring a class without using a class? The system does not allocate memory to the class. Public is a common member method. Private is

= Ca.get (calendar.month) +1;int day = Ca.get (calendar.day_of_month); int week = Ca.get (calendar.day_of_week); int hour = Ca.get (calendar.hour); int minute = Ca.get (calendar.minute); int second = Ca.get (Calendar.second); System.out.print (year+ "-" +mon+ "-" +day+ "-" +getweek (week) + "-" +hour+ ":"), if (minute>9) {System.out.println ( Minute+ ":" +second);} else {System.out.println ("0" +mInute+ ":" +second);}} private static String Getweek (int i) {string[] week = {"", "Sunday", "Monda

", 11)); Al.add (New Man ("B", 12)); Al.add (New Man ("C", 13)); Al.add (New Man ("a", one));p rintf (AL); Al = Arraylisthashdemo (AL);p rintf (AL); System.out.println (Al.remove (New Man ("a", one)));p rintf (AL); public static ArrayList Arraylisthashdemo (ArrayliSt al) {ArrayList temp = new ArrayList (); Iterator it = Al.iterator (); while (It.hasnext ()) {Object obj = It.next (); if (!temp.c Ontains (obj)) temp.add (obj); return temp;} public stati

completedReturn value type: Method The data type of the result to returnArguments: Data that is actually passed to the method form parameter when the method is calledSecond, the example method:Method declarations are called class methods that are decorated with static, and are called instance methods without static adornments.The difference between a class method and an instance method:Methods in a class can be called to each other, where instance methods can invoke instance methods or class me

1. Order of construction of objects(1) for a local object : Constructed when the program execution Flow arrives at the object's definition statementThe construction order of the "instance analysis" local objects(2) for heap Objects① creating an object when the program execution flow arrives at the new statement② using new to create an object will automatically t

;} public int getage () {return age;} public void Setage (int.) {this.age = age;} Public Mans (String name, int age) {super (); this.name = Name;this.age = age;} Public Man () {super ();//TODO auto-generated constructor stub} @Overridepublic int Hashcode () {final int prime = 31;int Res Ult = 1;result = Prime * result + Age;result = Prime * result + ((name = = null)? 0:name.hashcode ()); return result; @Overridepublic boolean equals (Object obj) {if (

knowledge pointsOutside double quotes, inside the double quotation marks to single quotation marks;When the row height setting is set in the Div, the row occupied by default is in the middle position (middle of the div in the upper and lower section-"default" vertically centered), no matter how high the setting is.The value of the text box is a string that needs to be converted to a number using parseint ().S.match (REG); s represents a string, and Reg represents a string that matches both, and

Service1.javaPackage publicclass Service1 { publicvoid DoService1 () { System.out.println ("Business Method 1");} }Service2.javaPackage publicclass Service2 { publicvoid DoService2 () { System.out.println ("Business Method 1");} }Spring.txt (D:\spring)Class=reflection. Service1method=doservice1Test.java Packagereflection;ImportJava.io.File;ImportJava.io.FileInputStream;ImportJava.lang.reflect.Constructor;ImportJava.lang.reflect.Method;Importjava.util.Properties;

circumference of the PI circle to the diameter E is the base of the natural logarithm and these two do not need to be defined directlyImport Java.io.ioexception;import Java.util.random;public class Main {public static void main (string[] args) {Double D1 = M Ath.ceil (11.51);//returns the smallest integer greater than the parameter double D2 = Math.floor (11.51);//returns the largest integer less than the number of parameters double D3 = Math.Round (11.51);// Returns rounded System.out.println

original list and then updates the value of the original list, with no return value sorted the function generates a new list, does not change the value of the original list and has a return value# a=[' BBB ', ' aaa ', ' CCV ', ' Zoo ']# print (sorted (a,key=str.lower)) #根据字符串大小写进行排序## #self代表当前对象# class Person:# def __init__ (self,sex=none): #初始化函数# Self.sex=sex# Def eat (self):# print ("Eating Now")# Def sleep (self):# print ("Sleeping ....")# def Say (self):# Print (self.name,self.age,self.se

characters, with an initial capacity of 16Variable-length arraysThe data stored in the array, when not saved, will automatically open a new array, the new book Group is usually about 1 time times the length of the original array, and then copy the original array, and then continue to store new data, pay attention to efficiency issuesSecond, StringBuilder classActually, it's stringbuffer.The serious difference is that the birth time is different.StringBuffer: Guaranteed synchronization, Thread s

JAVA learning lesson 40th (Common Object API)-Map set exercises, apimap 1. LinkedHashMap set Import java. util. hashMap; import java. util. iterator; import java. util. linkedHashMap; import java. util. map; public class Main {public static void main (String [] args) {HashMap Exercise: Number of occurrences of letters Import java. util. iterator; import java. util. map; import java. util. treeMap;/* "as

Individual instances, individual individual---Singleton modeLong long ago, there was only a basic data type in JS.I want to describe a personvar name = "Side East strategy";var age = 28;var height = "148cm";var weight = "200kg";I want to describe the second person.var name = "Li Jianjie";var age = 18;var height = "188cm";var weight = "60kg";Now that we have a problem, the information we described later covers the first person's information. The conflict between variables and the pollution of glo

JAVA learning lesson 30th (Common Object API)-String class: Class Method exercises Intern Method Public class Main {public static void main (String [] args) {String str1 = new String ("asd"); String str2 = str1.intern ();/* The String constant pool has, returns the string. If no string is returned, the System creates */System. out. println (str2); System. out. println (str1 = str2 );}} Exercise 1: Sort st