如何强制立即实例化枚举值？

public enum MyEnum {
    VALUE1,
    VALUE2,
    VALUE3;

    static {
        // 在静态代码块中实例化枚举值
        VALUE1 = new MyEnum();
        VALUE2 = new MyEnum();
        VALUE3 = new MyEnum();
    }
}

public enum MyEnum {
    VALUE1 {
        @Override
        public void instantiate() {
            // 实例化VALUE1
        }
    },
    VALUE2 {
        @Override
        public void instantiate() {
            // 实例化VALUE2
        }
    },
    VALUE3 {
        @Override
        public void instantiate() {
            // 实例化VALUE3
        }
    };

    // 实例化方法
    public abstract void instantiate();
}