Java Date operation

//String to date     Public Static voidDT7 ()throwsparseexception {String str_date= "------08"; DateFormat DT=NewSimpleDateFormat ("Yyyy--mm--dd"); Date Date=Dt.parse (str_date);    SYSTEM.OUT.PRINTLN (date); }     Public Static voidDT6 ()throwsparseexception {String str_date= "August 08, 2015"; DateFormat DT=dateformat.getdateinstance (Dateformat.long); Date Date=Dt.parse (str_date);    SYSTEM.OUT.PRINTLN (date); }     Public Static voidDa3 ()throwsparseexception {String str_date= "2015-08-08"; DateFormat DT=dateformat.getdateinstance (); Date Date=Dt.parse (str_date);    SYSTEM.OUT.PRINTLN (date); }        //Date to String     Public Static voiddt3 () {Date dt=NewDate (); DateFormat DTF=NewSimpleDateFormat ("Yyyy-mm-dd"); String s=dtf.format (DT);    System.out.println (s); }     Public Static voidDT2 () {Date dt=NewDate (); DateFormat DTF=dateformat.getdateinstance (Dateformat.long); String s=dtf.format (DT);    System.out.println (s); }     Public Static voidcl () {LongTime=System.currenttimemillis (); Date DT=NewDate (20151440592355603l);        System.out.print (DT);    System.out.print (time); }

Java Date operation