Compiling Problem

[Bharadwaj Adepu]

This is a piece of a code am trying to compile
This is compeling fine when i compile with
javac -source 1.5 -target 1.5

  SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
String strCalDate = (String)request.getParameter("serFromDate");
strCalDate=(strCalDate==null)?dateFormat.format(new Date().getTime()):strCalDate;
  

But this gives the following error when i compile with
javac -source 1.4 -target 1.4

  com/WebTracker/Action/TSHandler.java:206: cannot find symbol
symbol  : method format(long)
location: class java.text.SimpleDateFormat
                strCalDate=(strCalDate==null)?dateFormat.format(new Date().getTime()):strCalDate;  

What might be the problem.
Ive gone through APIs of both 1.5 and 1.4 version of Java, but not able to find out

[Campbell Ritchie]

The API documentation and the error message tell it all; you are passing the wrong sort of argument to the format() method. It takes Date, and you are passing getTime(). You want to pass the Date with the getTime() method call removed.

[Campbell Ritchie]

The format(Object) method of DateFormat might accept the long argument by autoboxing, which was introduced in Java 5.

[James Basller]

Originally posted by Bharadwaj Adepu:
This is a piece of a code am trying to compile
This is compeling fine when i compile with
javac -source 1.5 -target 1.5

  SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
String strCalDate = (String)request.getParameter("serFromDate");
strCalDate=(strCalDate==null)?dateFormat.format(new Date().getTime()):strCalDate;
  

But this gives the following error when i compile with
javac -source 1.4 -target 1.4

  com/WebTracker/Action/TSHandler.java:206: cannot find symbol
symbol  : method format(long)
location: class java.text.SimpleDateFormat
                strCalDate=(strCalDate==null)?dateFormat.format(new Date().getTime()):strCalDate;  

What might be the problem.
Ive gone through APIs of both 1.5 and 1.4 version of Java, but not able to find out

Yes, Campbell is right!!!
Here you are passing long where dateFormat.format() parameter accepts Date Object.

[Campbell Ritchie]

No, I think you have misunderstood my reply.

The long is autoboxed to a Long, and passed as an argument to the overloaded method with Object as its parameter type.
Not to the overloaded version taking Date as its parameter type. Since autoboxing was introduced in Java5, that explains why it won't work in Java4 . . .


At least I think that's right.

CR