JAVA時間間隔文字列の有効性検証

String[] zone1="08:30-11:00".split("-");
        String[] zone2="13:00-17:00".split("-");
        String[] actzone="9:00-11:00".split("-");
        DateFormat df = new SimpleDateFormat("hh:mm");
        try{
        long mintime=df.parse("00:00").getTime();
        long maxtime=df.parse("24:00").getTime();
        long[] time1={df.parse(zone1[0]).getTime(),df.parse(zone1[1]).getTime()};
        long[] time2={df.parse(zone2[0]).getTime(),df.parse(zone2[1]).getTime()};
        long[] acttime={df.parse(actzone[0]).getTime(),df.parse(actzone[1]).getTime()};
        if(time1[0]>=time1[1]||time1[0]<=mintime||time1[1]>=maxtime)
            System.out.println("操作区间一不合法");
        if(time2[0]>=time2[1]||time2[0]<=mintime||time2[1]>=maxtime)
            System.out.println("操作区间二不合法");
        if(acttime[0]>=acttime[1]||acttime[0]<=mintime||acttime[1]>=maxtime)
            System.out.println("高峰期区间不合法");
        boolean ifLegal=false;
        if(acttime[0]>=time1[0]&&acttime[1]<=time1[1])
            ifLegal=true;
        if(acttime[0]>=time2[0]&&acttime[1]<=time2[1])
            ifLegal=true;
        if(ifLegal)
            System.out.println("info:高峰期区间合法");
        else
            System.out.println("warn:高峰期区间不合法");
        }catch(Exception e){
            e.printStackTrace();
        }