这个静态内部类实现的单例是迟加载且线程安全的吗？

public class JiveProperties {    private static final String LOAD_PROPERTIES = "SELECT name, propValue FROM ofProperty";    private JiveProperties() {    System.out.println("JiveProperties constructor");    }        static {    System.out.println("static block");    }        private static class JivePropertyHolder {    static {            System.out.println("initing1");        }        private static final String LOAD_PROPERTIES = "Inner Static Class...";        private JivePropertyHolder() {    System.out.println("inner class...");    }            private static final JiveProperties instance = new JiveProperties();                static {            System.out.println("initing2");        }    }    public static JiveProperties getInstance() {        return JivePropertyHolder.instance;    }    public static void main(String[] args) {    System.out.println(JiveProperties.JivePropertyHolder.LOAD_PROPERTIES);}    }

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结果：

static block
Inner Static Class...

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因此初步判断是迟加载且是线程安全的（由final保证）

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