Java并发 | 单例的其他实现

单例模式

静态内置类实现

class MyObject {

    private static class MyObjectHandler {
        private static MyObject object = new MyObject();
    }

    private MyObject() {
    }

    public static MyObject getInstance() {
        return MyObjectHandler.object;
    }
}

使用static代码块实现

class MyObject {

    private static MyObject object;

    private MyObject() {
    }

    static {
        object = new MyObject();
    }

    public static MyObject getInstance() {
        return object;
    }
}

使用enum枚举实现