写单例模式中的代码,懒汉模式,饿汉模式
时间: 2024-04-29 17:25:55 浏览: 8
懒汉模式:
```
public class Singleton {
private static Singleton instance;
private Singleton() {}
public static synchronized Singleton getInstance() {
if (instance == null) {
instance = new Singleton();
}
return instance;
}
}
```
饿汉模式:
```
public class Singleton {
private static Singleton instance = new Singleton();
private Singleton() {}
public static Singleton getInstance() {
return instance;
}
}
```