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package zeittest;

public class ZeitTest 
{
    public static void main(String[] args) 
    {
        Zeit t = new Zeit ("1","33");
        t.print();
    }
}


class Zeit 
{
    private String stunde1;
    private String minute1; 
    
    public Zeit ()
    {
        stunde1="00";
        minute1="00";
    }
    
    public Zeit (String stunde, String minute)
    {
        stunde1 = stunde;
        minute1 = minute; 
        
        if (Integer.valueOf(stunde)>23 || Integer.valueOf(stunde)<0 )
        {
            stunde1="00";
            minute1="00";
        }
        else if (Integer.valueOf(minute)>59 || Integer.valueOf(minute)<0)
        {
            stunde1="00";
            minute1="00";
        }
        else if (Integer.valueOf(stunde)>=0 && Integer.valueOf(stunde)<10) 
        {
            stunde1= "0" + stunde; 
        }
    }

    
    public void print ()
    {
        System.out.println(stunde1 + ":" + minute1);
    }
}