private Class class=new Class();和private Class class;的区别

private Class class=new Class();和private Class class;的区别 [code=C#] public class Instance { private class SingletonInstance { private SingletonInstance() { } private static final log log = logfactory.getlog(***.class); class中publice什么意思?还有private class class Class class Point{ private double x; private double y; Point(double x1,double y1){ x=x1; y=y1; } public private static final Log log = LogFactory.getLog(DataSourceManager.class); 它的作用? JAVA program about compareTo methodConsoder the following incomplete declaration of a Name class.public class Name something missing{private String first;private String last;public Name(String firstName,String lastName){first=firstName;last=lastName; 关于一个类的语句解释using System;public class student{private string Sid; static int count;public student(string id){Sid = id;count++;}public void display(){Console.WriteLine(sid:{0},Sid);Console.WriteLine(count:{0},count);}}class Class 希望有人能帮我解释一下下面的代码! 关于c#namespace NewHMIBth{ public partial class Form1 : Form { private BluetoothListener Listener; private List clientList = new List(); private bool listening = true; C#语法的问题 get set的用法public class Users { private int _userid; private string _username; private string _userpwd; public int UserId { get { return this._userid; } set { this._userid = value; } } public string UserName { get { return this C#语法问题 this的用法public class Users{private int _userid;private string _username;private string _userpwd;public int UserId{get { return this._userid; }set { this._userid = value; }}public string UserName{get { return this._username; }set { selection does not contain a main type的问题import java.util.Scanner;public class Population {private String name;private int population;private double growthRate;public void readInput(){Scanner keyboard = new Scanner(System.in);System.out.println class=box height class=tbl是什么? class=wordstyle是什么意思