一些java的demo

　　　　　//1. false
        System.out.println(Integer.parseInt("01")>10);
        //2. abcdefghijklmnopqrstuvwxyz
        System.out.println("ABCDEFGHIJKLMNOPQRSTUVWXYZ".toLowerCase(Locale.ENGLISH));
        //3.　true
        String regex = "CCNB-APPROVAL-[0-9]{8}-[0-9]{1,5}\\.ok";
        String name = "CCNB-APPROVAL-20150306-01.ok";
        System.out.println(name.matches(regex));
        //4.  false
        System.out.println(!true);
        //5.  a
        System.out.println("abc".substring(0,1));
        //6.  null
        System.out.println("null");
        //编译不通过
        System.out.println(null);