java

#include<stdio.h>
#include<string.h>
#include<iostream>
#include<algorithm>
using namespace std;
class Singleton
{
public:
static Singleton* getInstance();

private:
Singleton();
Singleton(const Singleton&);
Singleton& operator=(const Singleton&);
static Singleton* instance;
};
Singleton::Singleton()
{
}
Singleton::Singleton(const Singleton&)
{
}
Singleton& Singleton::operator=(const Singleton&)
{
}
Singleton* Singleton::instance = new Singleton();
Singleton* Singleton::getInstance(){
return instance;
}
int main(){
Singleton* singleton1 = Singleton::getInstance();
Singleton* singleton2 = Singleton::getInstance();
return 0;
}
package dsssd;

class Emperor {
private static Emperor emperor = null;

private Emperor() {
}

public static Emperor getInstance() {
if (emperor == null) {
emperor = new Emperor();
}
return emperor;
}

public void getName() {
return ;
}

}

class aaaa {
public static void main(String[] args)  {

Emperor emperor1 = Emperor.getInstance();
emperor1.getName();

Emperor emperor2 = Emperor.getInstance();
emperor2.getName();

}

}