以下單例實現(xiàn)思想來自《Java Design Patterns: A Programmer's Approach》.
該方法利用了Java缺省的Lazy類實例化機制克服了傳統(tǒng)單例模式實現(xiàn)中Lazy實例化方式的不足。
public class Singleton {
private Singleton(){}
public static Singleton getInstance(){
return Helper.instance;
}
static class Helper {
private static Singleton instance = new Singleton();
}
}