一个Java Singleton示例，我可以像这样修改代码吗？

public class Singleton {
    private static Singleton instance;
    
    private Singleton() {
        // 私有化构造函数
    }
    
    public static Singleton getInstance() {
        if (instance == null) {
            synchronized (Singleton.class) {
                if (instance == null) {
                    instance = new Singleton();
                }
            }
        }
        return instance;
    }
}