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Re: how does one explain this syntax?

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On Sunday, May 22, 2016 at 4:21:29 AM UTC-7, Eric Sosman wrote:
> On 5/22/2016 1:51 AM, ruben safir wrote:
> > This passes for a demonstration and teaching example for a TreeMap
> 
>      Until somebody added uncompilable junk to it, perhaps.
> 
> > import java.util.TreeMap;
> > import java.util.Set;
> > import java.util.Iterator;
> > import java.util.Map;
> >
> > public class Details {
> >
> >    public static void main(String args[]) {
> >
> >       /* This is how to declare TreeMap */
> >       TreeMap<Integer, String> tmap =
> >              new TreeMap<Integer, String>(); <<studdering is always good
> 
>      Not sure what you mean here.

Hard to tell, since "studdering" is not a word in English.

> 
> >       /*Adding elements to TreeMap*/
> >       tmap.put(1, "Data1");
> >       tmap.put(23, "Data2");
> >       tmap.put(70, "Data3");
> >       tmap.put(4, "Data4");
> >       tmap.put(2, "Data5");
> >
> >       /* Display content using Iterator*/
> >       Set set = tmap.entrySet(); <<random obscure syntax... that is a
> > constructor for another class?
> 
>      It's a method call.

It's a method call to a method that is well documented in the Javadocs and has been around since Java 1.2, introduced about seventeen and a half years ago. It's rather important for all Java programmers to be familiar with 'Map', 'List', 'Set', and the other interfaces in the collections framework. I commend the Oracle Java Tutorials to your attention, @ruben safir.
> 
> >       Iterator iterator = set.iterator(); <<again, twice?

Again, what twice?

Have you even read the Java Tutorials?

>      It's a method call.
> 
> >       while(iterator.hasNext()) {
> >          Map.Entry mentry = (Map.Entry)iterator.next();  <<What the heck
> > is this?

Pretty much bog-standard calls in Java, very common and universal.

Check out the Java Tutorials.

>      It's a method call, with a cast applied to the returned value.
> 
> >          System.out.print("key is: "+ mentry.getKey() + " & Value is:
> > "); <<How many levels of random systax does one need to just to do a loop?

None.

>      It's a method call, not something random and certainly not "systax."
> 
> >          System.out.println(mentry.getValue());
> >       }
> >
> >    }
> > }

ruben safir, your main difficulty is that you have neither taken any elementary Java training, nor studied any introductory Java tutorial material.

-- 
Lew

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how does one explain this syntax? ruben safir <ruben@mrbrklyn.com> - 2016-05-22 01:51 -0400
  Re: how does one explain this syntax? Martin Gregorie <martin@address-in-sig.invalid> - 2016-05-22 10:05 +0000
  Re: how does one explain this syntax? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-22 07:21 -0400
    Re: how does one explain this syntax? Popping mad <rainbow@colition.gov> - 2016-05-22 20:21 +0000
      Re: how does one explain this syntax? Lars Enderin <lars.enderin@telia.com> - 2016-05-22 22:32 +0200
      Re: how does one explain this syntax? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-22 17:32 -0400
      Re: how does one explain this syntax? Lew <lewbloch@gmail.com> - 2016-05-23 14:36 -0700
    Re: how does one explain this syntax? Lew <lewbloch@gmail.com> - 2016-05-23 14:34 -0700
  Re: how does one explain this syntax? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-05-22 08:41 -0700
    Re: how does one explain this syntax? Robert Klemme <shortcutter@googlemail.com> - 2016-05-22 22:22 +0200
      Re: how does one explain this syntax? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-05-22 22:13 -0700
        Re: how does one explain this syntax? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-23 07:32 -0400
          Re: how does one explain this syntax? Robert Klemme <shortcutter@googlemail.com> - 2016-05-23 04:57 -0700
  Re: how does one explain this syntax? Popping mad <rainbow@colition.gov> - 2016-05-22 20:23 +0000
  Re: how does one explain this syntax? Roedy Green <inquiry@mindprod.com> - 2016-05-30 21:51 -0700
  Re: how does one explain this syntax? Roedy Green <inquiry@mindprod.com> - 2016-05-30 21:54 -0700
  Re: how does one explain this syntax? Roedy Green <inquiry@mindprod.com> - 2016-05-30 22:00 -0700
  Re: how does one explain this syntax? Roedy Green <inquiry@mindprod.com> - 2016-05-30 22:17 -0700

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