static void Main(string[] args)
{
Singleton2 s1 = Singleton2.GetInstance();
Singleton2 s2 = Singleton2.GetInstance();
if (s1 == s2)
{
Console.WriteLine("两个对象是相同的");
}
Console.Read();
}
private static void TestLasyInitialSingleton()
{
Console.WriteLine("延迟初始化实例");
Singleton2 singleton2 = Singleton2.Instance();
singleton2.GetInfo();
singleton2.Reset();
Console.ReadLine();
}
public static Singleton2 GetSingleton()
{
lock (syncRoot)
{
if (instance == null)
{
instance = new Singleton2();
}
}
return(instance);
}
public static Singleton2 GetInstance()
{
lock (_lock)
{
if (instance == null)
{
instance = new Singleton2();
}
}
return(instance);
}
public static Singleton2 GetSingleton2()
{
if (_singleton2 == null)
{
lock (LockHelper)
{
if (_singleton2 == null)
{
_singleton2 = new Singleton2();
}
}
}
return(_singleton2);
}
static void Main(string[] args)
{
//
var company1 = Singleton1.GetInstance("Company 1");
var company2 = Singleton1.GetInstance("Company 2");
Console.WriteLine(company1.Name); // 1
Console.WriteLine(company2.Name); // 1
//
(new Thread(() =>
{
var os1 = Singleton2.GetInstance("Windows 10");
Console.WriteLine(os1.Name);
})).Start();
var os2 = Singleton2.GetInstance("Ubuntu");
Console.WriteLine(os2.Name);
//
(new Thread(() =>
{
var createDate1 = Singleton3.GetInstance();
Console.WriteLine(createDate1.Date.Ticks);
})).Start();
var createDate2 = Singleton3.GetInstance();
Console.WriteLine(createDate2.Date.Ticks);
//
(new Thread(() =>
{
var modifyDate1 = Singleton4.GetInstance();
Console.WriteLine(modifyDate1.Date.Ticks);
})).Start();
var modifyDate2 = Singleton4.GetInstance();
Console.WriteLine(modifyDate2.Date.Ticks);
//
(new Thread(() =>
{
var lazy1 = Singleton5.GetInstance();
Console.WriteLine(lazy1.Id);
})).Start();
var lazy2 = Singleton5.GetInstance();
Console.WriteLine(lazy2.Id);
}
public static void Main(string[] args)
{
//0
var i0 = Singleton.GetInstance();
Console.WriteLine($"Singleton {ReferenceEquals(i0, Singleton.GetInstance())}");
//1
var i1 = Singleton1.GetInstance();
Console.WriteLine($"Singleton1 {ReferenceEquals(i1, Singleton1.GetInstance())}");
//2
var i2 = Singleton2.GetInstance();
Console.WriteLine($"Singleton2 {ReferenceEquals(i2, Singleton2.GetInstance())}");
Console.ReadLine();
}
public static void Main(string[] args)
{
// //0
// var i0 = Singleton.GetInstance();
// Console.WriteLine($"Singleton {ReferenceEquals(i0, Singleton.GetInstance())}");
// //1
// var i1 = Singleton1.GetInstance();
// Console.WriteLine($"Singleton1 {ReferenceEquals(i1, Singleton1.GetInstance())}");
// //2
// var i2 = Singleton2.GetInstance();
// Console.WriteLine($"Singleton2 {ReferenceEquals(i2, Singleton2.GetInstance())}");
Console.WriteLine($"Singleton");
Enumerable.Range(1, 10).Select(i => Task.Run(() =>
{
Console.WriteLine($"{Singleton.GetInstance().GetHashCode()}");
})).WhenAll().Wait();
Console.WriteLine($"Singleton1");
Enumerable.Range(1, 10).Select(i => Task.Run(() =>
{
Console.WriteLine($"{Singleton1.GetInstance().GetHashCode()}");
})).WhenAll().Wait();
Console.WriteLine($"Singleton2");
Enumerable.Range(1, 10).Select(i => Task.Run(() =>
{
Console.WriteLine($"{Singleton2.GetInstance().GetHashCode()}");
})).WhenAll().Wait();
Console.WriteLine($"Singleton3");
Enumerable.Range(1, 10).Select(i => Task.Run(() =>
{
Console.WriteLine($"{Singleton3.GetInstance().GetHashCode()}");
})).WhenAll().Wait();
Console.ReadLine();
}
/// <summary>
/// 使用此方法销毁已创建的实例
/// </summary>
public void Reset()
{
_instance = null;
}
public static Singleton2 Instance()
{
return(_instance ?? (_instance = new Singleton2()));
}
public static Singleton2 Instance()
{
return(_instance ?? (_instance = new Singleton2()));//变量定义中含有两个问号，意思是取所赋值??左边的，如果左边为null，取所赋值??右边的。
}
