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);