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Java2Nrx "educational" question...

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Michael (maillists) Dag

Java2Nrx "educational" question...

Found this piece of java code:

import java.io.*;

import java.net.*;

import java.util.*;

import static java.lang.System.out;

public class ListNets {

public static void main(String args[]) throws SocketException {

Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();

for (NetworkInterface netint : Collections.list(nets))

displayInterfaceInformation(netint);

}

static void displayInterfaceInformation(NetworkInterface netint) throws SocketException {

out.printf("Display name: %s\n", netint.getDisplayName());

out.printf("Name: %s\n", netint.getName());

Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();

for (InetAddress inetAddress : Collections.list(inetAddresses)) {

out.printf("InetAddress: %s\n", inetAddress);

}

out.printf("\n");

}

Java2Nrx-ed it to:

import java.io.

import java.net.

import java.util.

class ListNets public

method main( args=String[] ) static signals SocketException

nets = Enumeration /* **nonrx** <NetworkInterface> ** */

nets = NetworkInterface.getNetworkInterfaces()

for (netint = NetworkInterface

: Collections.list(nets)) displayInterfaceInformation(netint)

method displayInterfaceInformation( netint=NetworkInterface ) static signals SocketException

say "Display name: " netint.getDisplayName()

say "Name: " netint.getName()

inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

inetAddresses = netint.getInetAddresses()

for (inetAddress = InetAddress

: Collections.list(inetAddresses)) say "InetAddress: " inetAddress

say "\n"

when it try to compile this with nrc I get:

C:\NetRexx\java2nrx>nrc ListNets

NetRexx portable processor, version NetRexx 3.02, build 172-20130625-1742

Parts Copyright (c) IBM Corporation, 1995,2008.

Program ListNets.nrx

12 +++ : Collections.list(nets)) displayInterfaceInformation(netint)

+++ ^

+++ Error: Unexpected character found in source: ':' (hexadecimal encoding: 003A)

Compilation of 'ListNets.nrx' failed [one error]

I re-wrote part of this in another way,so I have the code working now…

but I fail to understand what the bold orange part does or what it is supposed to translate into?

Can someone shed some light on this for me please?

It feels I took the long way home and fail to see the short cut…

Working different nrx code but doing the same…

import java.io.

import java.net.

import java.util.

class ListNetsx public

method main( args=String[] ) static signals SocketException

net_list = Enumeration /* **nonrx** <NetworkInterface> ** */

net_list = NetworkInterface.getNetworkInterfaces()

net_if = NetworkInterface

loop while net_list.hasMoreElements()

net_if = (NetworkInterface net_list.nextElement())

inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

inetAddresses = net_if.getInetAddresses()

say "Display name: "||net_if.getDisplayName()

say "Name: "||net_if.getName()

inetAddr = InetAddress

loop while inetAddresses.hasMoreElements()

inetAddr = (InetAddress inetAddresses.nextElement())

say inetAddr

end

Michael

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alansam

Re: Java2Nrx "educational" question...

Michael,

As of Java 5 the looping construct [for] was enhanced to provide a "loop over" capability for members of the Collection classes. The Java syntax above is shorthand for:

for (Iterator i = Collections.list(nets).iterator(); i.hasNext();) {

NetworkInterface netint = (NetworkInterface) i.next();

displayInterfaceInformation(netint);

}

Regards,
Alan.

On 10 May 2014 06:00, <[hidden email]> wrote:

Found this piece of java code:

import java.io.*;
import java.net.*;

import java.util.*;
import static java.lang.System.out;

public class ListNets {

    public static void main(String args[]) throws SocketException {
        Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();

        for (NetworkInterface netint : Collections.list(nets))
            displayInterfaceInformation(netint);

    }

    static void displayInterfaceInformation(NetworkInterface netint) throws SocketException {

        out.printf("Display name: %s\n", netint.getDisplayName());
        out.printf("Name: %s\n", netint.getName());

        Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();
        for (InetAddress inetAddress : Collections.list(inetAddresses)) {

            out.printf("InetAddress: %s\n", inetAddress);
        }

        out.printf("\n");
     }
}

Java2Nrx-ed it to:

import java.io.
import java.net.

import java.util.

class ListNets public

    method main( args=String[] ) static signals SocketException

        nets = Enumeration /* **nonrx** <NetworkInterface> ** */
        nets = NetworkInterface.getNetworkInterfaces()

        for (netint = NetworkInterface
         : Collections.list(nets)) displayInterfaceInformation(netint)

    method displayInterfaceInformation( netint=NetworkInterface ) static signals SocketException

        say "Display name: " netint.getDisplayName()
        say "Name: " netint.getName()

        inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */
        inetAddresses = netint.getInetAddresses()

        for (inetAddress = InetAddress
         : Collections.list(inetAddresses)) say "InetAddress: " inetAddress

        say "\n"

when it try to compile this with nrc I get:

C:\NetRexx\java2nrx>nrc ListNets
NetRexx portable processor, version NetRexx 3.02, build 172-20130625-1742

Copyright (c) RexxLA, 2011,2013. All rights reserved.
Parts Copyright (c) IBM Corporation, 1995,2008.

Program ListNets.nrx
12 +++          : Collections.list(nets)) displayInterfaceInformation(netint)

    +++          ^
    +++ Error: Unexpected character found in source: ':' (hexadecimal encoding: 003A)

Compilation of 'ListNets.nrx' failed [one error]

I re-wrote part of this in another way,so I have the code working now…

but I fail to understand what the bold orange part does or what it is supposed to translate into?

Can someone shed some light on this for me please?
It feels I took the long way home and fail to see the short cut…

Working different nrx code but doing the same…

import java.io.
import java.net.

import java.util.

class ListNetsx public

    method main( args=String[] ) static signals SocketException

        net_list = Enumeration /* **nonrx** <NetworkInterface> ** */
        net_list = NetworkInterface.getNetworkInterfaces()

        net_if = NetworkInterface
        loop while net_list.hasMoreElements()

          net_if = (NetworkInterface net_list.nextElement())


          inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */
          inetAddresses = net_if.getInetAddresses()

          say "Display name: "||net_if.getDisplayName()
          say "Name: "||net_if.getName()

          inetAddr = InetAddress
          loop while inetAddresses.hasMoreElements()

            inetAddr = (InetAddress inetAddresses.nextElement())
              say inetAddr

          end
        end

Michael

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Alan

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Kermit Kiser

Re: Java2Nrx "educational" question...

Alan forgot to mention that NetRexx 3.01 included an enhancement of the "LOOP" instruction allowing use of "OVER" with Java collections. A simple NetRexx code equivalent with "loop over" is this:

class ListNets public

    method main( args=String[] ) static signals SocketException

        nets = Enumeration /* **nonrx** <NetworkInterface> ** */
        nets = NetworkInterface.getNetworkInterfaces()

       netint = NetworkInterface
       loop netint over Collections.list(nets)
         displayInterfaceInformation(netint)
        end

    method displayInterfaceInformation( netint=NetworkInterface ) static signals SocketException

        say "Display name: " netint.getDisplayName()
        say "Name: " netint.getName()

        inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */
        inetAddresses = netint.getInetAddresses()

        inetAddress = InetAddress
        loop inetAddress over Collections.list(inetAddresses)
             say "InetAddress: " inetAddress
           end

        say "\n"

On 5/10/2014 11:26 AM, Alan Sampson wrote:

Michael,

As of Java 5 the looping construct [for] was enhanced to provide a "loop over" capability for members of the Collection classes. The Java syntax above is shorthand for:

for (Iterator i = Collections.list(nets).iterator(); i.hasNext();) {

NetworkInterface netint = (NetworkInterface) i.next();

displayInterfaceInformation(netint);

}

Regards,
Alan.

On 10 May 2014 06:00, <[hidden email]> wrote:

Found this piece of java code:

import java.io.*;

import java.net.*;

import java.util.*;

import static java.lang.System.out;

public class ListNets {

    public static void main(String args[]) throws SocketException {

        Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();

        for (NetworkInterface netint : Collections.list(nets))

            displayInterfaceInformation(netint);

    }

    static void displayInterfaceInformation(NetworkInterface netint) throws SocketException {

        out.printf("Display name: %s\n", netint.getDisplayName());

        out.printf("Name: %s\n", netint.getName());

        Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();

        for (InetAddress inetAddress : Collections.list(inetAddresses)) {

            out.printf("InetAddress: %s\n", inetAddress);

        }

        out.printf("\n");

     }

}

Java2Nrx-ed it to:

import java.io.

import java.net.

import java.util.

class ListNets public

    method main( args=String[] ) static signals SocketException

        nets = Enumeration /* **nonrx** <NetworkInterface> ** */

        nets = NetworkInterface.getNetworkInterfaces()

        for (netint = NetworkInterface

         : Collections.list(nets)) displayInterfaceInformation(netint)

    method displayInterfaceInformation( netint=NetworkInterface ) static signals SocketException

        say "Display name: " netint.getDisplayName()

        say "Name: " netint.getName()

        inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

        inetAddresses = netint.getInetAddresses()

        for (inetAddress = InetAddress

         : Collections.list(inetAddresses)) say "InetAddress: " inetAddress

        say "\n"

when it try to compile this with nrc I get:

C:\NetRexx\java2nrx>nrc ListNets

NetRexx portable processor, version NetRexx 3.02, build 172-20130625-1742

Copyright (c) RexxLA, 2011,2013. All rights reserved.

Parts Copyright (c) IBM Corporation, 1995,2008.

Program ListNets.nrx

12 +++          : Collections.list(nets)) displayInterfaceInformation(netint)

    +++          ^

    +++ Error: Unexpected character found in source: ':' (hexadecimal encoding: 003A)

Compilation of 'ListNets.nrx' failed [one error]

I re-wrote part of this in another way,so I have the code working now…

but I fail to understand what the bold orange part does or what it is supposed to translate into?

Can someone shed some light on this for me please?

It feels I took the long way home and fail to see the short cut…

Working different nrx code but doing the same…

import java.io.

import java.net.

import java.util.

class ListNetsx public

    method main( args=String[] ) static signals SocketException

        net_list = Enumeration /* **nonrx** <NetworkInterface> ** */

        net_list = NetworkInterface.getNetworkInterfaces()

        net_if = NetworkInterface

        loop while net_list.hasMoreElements()

          net_if = (NetworkInterface net_list.nextElement())



          inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

          inetAddresses = net_if.getInetAddresses()

          say "Display name: "||net_if.getDisplayName()

          say "Name: "||net_if.getName()

          inetAddr = InetAddress

          loop while inetAddresses.hasMoreElements()

            inetAddr = (InetAddress inetAddresses.nextElement())

              say inetAddr

          end

        end

Michael

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alansam

Re: Java2Nrx "educational" question...

Yep I did forget to mention LOOP OVER which is a pretty neat enhancement to NetRexx and way more expressive than the Java equivalent.

Note though that even with the for (Iterator...) syntax, java2nrx still has a hard time converting the code into instantly compiled NetRexx; it inserts the Iterator declaration between the loop and while statements.

loop i = Iterator

i = Collections.list(nets).iterator() while i.hasNext()

NetRexx doesn't like the import static java.lang.System.out; clause, use of System.out.printf(String, ...) [not impossible to overcome but messy & not very Rexx like], variable names that are the same as type names and the way args is declared as main(String args[]) either.

I took a little extra time and recoded the Java as follows:

import java.io.*;

import java.net.*;

import java.util.*;

public class ListNets2 {

public static void main(String[] args) throws SocketException {

Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();

Iterator netsIter = Collections.list(nets).iterator();

while (netsIter.hasNext()) {

NetworkInterface netint = (NetworkInterface) netsIter.next();

displayInterfaceInformation(netint);

}

static void displayInterfaceInformation(NetworkInterface netint) /*throws SocketException*/ {

System.out.println("Display name: " + netint.getDisplayName());

System.out.println("Name: " + netint.getName());

Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();

Iterator netaddrIter = Collections.list(inetAddresses).iterator();

while (netaddrIter.hasNext()) {

InetAddress inetAddress_ = (InetAddress) netaddrIter.next();

System.out.println("InetAddress: " + inetAddress_);

}

System.out.println();

}

which renders the following NetRexx:

import java.io.

import java.net.

import java.util.

class ListNets2 public

method main( args=String[] ) static signals SocketException

nets = Enumeration /* **nonrx** <NetworkInterface> ** */

nets = NetworkInterface.getNetworkInterfaces()

netsIter = Iterator

netsIter = Collections.list(nets).iterator()

loop while netsIter.hasNext()

netint = NetworkInterface

netint = (NetworkInterface) netsIter.next()

displayInterfaceInformation(netint)

end

method displayInterfaceInformation( netint=NetworkInterface ) static

System.out.println("Display name: " || netint.getDisplayName())

System.out.println("Name: " || netint.getName())

inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

inetAddresses = netint.getInetAddresses()

netaddrIter = Iterator

netaddrIter = Collections.list(inetAddresses).iterator()

loop while netaddrIter.hasNext()

inetAddress_ = InetAddress

inetAddress_ = (InetAddress) netaddrIter.next()

System.out.println("InetAddress: " || inetAddress_)

end

System.out.println()

it still doesn't compile due to the (NetworkInterface) and (InetAddress) casts but that's easily resolved by removing the surrounding parentheses. Once those tweaks are applied the code compiles and runs.

Good luck,
Alan.

On 10 May 2014 12:54, Kermit Kiser <[hidden email]> wrote:

Alan forgot to mention that NetRexx 3.01 included an enhancement of the "LOOP" instruction allowing use of "OVER" with Java collections. A simple NetRexx code equivalent with "loop over" is this:

class ListNets public

    method main( args=String[] ) static signals SocketException

        nets = Enumeration /* **nonrx** <NetworkInterface> ** */
        nets = NetworkInterface.getNetworkInterfaces()

       netint = NetworkInterface
       loop netint over Collections.list(nets)
         displayInterfaceInformation(netint)
        end

    method displayInterfaceInformation( netint=NetworkInterface ) static signals SocketException

        say "Display name: " netint.getDisplayName()
        say "Name: " netint.getName()

        inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */
        inetAddresses = netint.getInetAddresses()

        inetAddress = InetAddress
        loop inetAddress over Collections.list(inetAddresses)
             say "InetAddress: " inetAddress
           end

        say "\n"
On 5/10/2014 11:26 AM, Alan Sampson wrote:
Michael,

As of Java 5 the looping construct [for] was enhanced to provide a "loop over" capability for members of the Collection classes. The Java syntax above is shorthand for:

for (Iterator i = Collections.list(nets).iterator(); i.hasNext();) {

NetworkInterface netint = (NetworkInterface) i.next();

displayInterfaceInformation(netint);

}

Regards,
Alan.

On 10 May 2014 06:00, <[hidden email]> wrote:

Found this piece of java code:

import java.io.*;

import java.net.*;

import java.util.*;

import static java.lang.System.out;

public class ListNets {

    public static void main(String args[]) throws SocketException {

        Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();

        for (NetworkInterface netint : Collections.list(nets))

            displayInterfaceInformation(netint);

    }

    static void displayInterfaceInformation(NetworkInterface netint) throws SocketException {

        out.printf("Display name: %s\n", netint.getDisplayName());

        out.printf("Name: %s\n", netint.getName());

        Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();

        for (InetAddress inetAddress : Collections.list(inetAddresses)) {

            out.printf("InetAddress: %s\n", inetAddress);

        }

        out.printf("\n");

     }

}

Java2Nrx-ed it to:

import java.io.

import java.net.

import java.util.

class ListNets public

    method main( args=String[] ) static signals SocketException

        nets = Enumeration /* **nonrx** <NetworkInterface> ** */

        nets = NetworkInterface.getNetworkInterfaces()

        for (netint = NetworkInterface

         : Collections.list(nets)) displayInterfaceInformation(netint)

    method displayInterfaceInformation( netint=NetworkInterface ) static signals SocketException

        say "Display name: " netint.getDisplayName()

        say "Name: " netint.getName()

        inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

        inetAddresses = netint.getInetAddresses()

        for (inetAddress = InetAddress

         : Collections.list(inetAddresses)) say "InetAddress: " inetAddress

        say "\n"

when it try to compile this with nrc I get:

C:\NetRexx\java2nrx>nrc ListNets

NetRexx portable processor, version NetRexx 3.02, build 172-20130625-1742

Copyright (c) RexxLA, 2011,2013. All rights reserved.

Parts Copyright (c) IBM Corporation, 1995,2008.

Program ListNets.nrx

12 +++          : Collections.list(nets)) displayInterfaceInformation(netint)

    +++          ^

    +++ Error: Unexpected character found in source: ':' (hexadecimal encoding: 003A)

Compilation of 'ListNets.nrx' failed [one error]

I re-wrote part of this in another way,so I have the code working now…

but I fail to understand what the bold orange part does or what it is supposed to translate into?

Can someone shed some light on this for me please?

It feels I took the long way home and fail to see the short cut…

Working different nrx code but doing the same…

import java.io.

import java.net.

import java.util.

class ListNetsx public

    method main( args=String[] ) static signals SocketException

        net_list = Enumeration /* **nonrx** <NetworkInterface> ** */

        net_list = NetworkInterface.getNetworkInterfaces()

        net_if = NetworkInterface

        loop while net_list.hasMoreElements()

          net_if = (NetworkInterface net_list.nextElement())



          inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

          inetAddresses = net_if.getInetAddresses()

          say "Display name: "||net_if.getDisplayName()

          say "Name: "||net_if.getName()

          inetAddr = InetAddress

          loop while inetAddresses.hasMoreElements()

            inetAddr = (InetAddress inetAddresses.nextElement())

              say inetAddr

          end

        end

Michael

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Alan

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Needs more cowbell.

duvangrd

Re: Java2Nrx "educational" question...

In reply to this post by Michael (maillists) Dag

Please remove me from this list.

Thank you.

From: [hidden email] [mailto:[hidden email]] On Behalf Of [hidden email]
Sent: Saturday, May 10, 2014 8:00 AM
To: IBM Netrexx
Subject: [Ibm-netrexx] Java2Nrx "educational" question...

Found this piece of java code:

import java.io.*;

import java.net.*;

import java.util.*;

import static java.lang.System.out;

public class ListNets {

public static void main(String args[]) throws SocketException {

Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();

for (NetworkInterface netint : Collections.list(nets))

displayInterfaceInformation(netint);

}

static void displayInterfaceInformation(NetworkInterface netint) throws SocketException {

out.printf("Display name: %s\n", netint.getDisplayName());

out.printf("Name: %s\n", netint.getName());

Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();

for (InetAddress inetAddress : Collections.list(inetAddresses)) {

out.printf("InetAddress: %s\n", inetAddress);

}

out.printf("\n");

}

Java2Nrx-ed it to:

import java.io.

import java.net.

import java.util.

class ListNets public

method main( args=String[] ) static signals SocketException

nets = Enumeration /* **nonrx** <NetworkInterface> ** */

nets = NetworkInterface.getNetworkInterfaces()

for (netint = NetworkInterface

: Collections.list(nets)) displayInterfaceInformation(netint)

method displayInterfaceInformation( netint=NetworkInterface ) static signals SocketException

say "Display name: " netint.getDisplayName()

say "Name: " netint.getName()

inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

inetAddresses = netint.getInetAddresses()

for (inetAddress = InetAddress

: Collections.list(inetAddresses)) say "InetAddress: " inetAddress

say "\n"

when it try to compile this with nrc I get:

C:\NetRexx\java2nrx>nrc ListNets

NetRexx portable processor, version NetRexx 3.02, build 172-20130625-1742

Parts Copyright (c) IBM Corporation, 1995,2008.

Program ListNets.nrx

12 +++ : Collections.list(nets)) displayInterfaceInformation(netint)

+++ ^

+++ Error: Unexpected character found in source: ':' (hexadecimal encoding: 003A)

Compilation of 'ListNets.nrx' failed [one error]

I re-wrote part of this in another way,so I have the code working now…

but I fail to understand what the bold orange part does or what it is supposed to translate into?

Can someone shed some light on this for me please?

It feels I took the long way home and fail to see the short cut…

Working different nrx code but doing the same…

import java.io.

import java.net.

import java.util.

class ListNetsx public

method main( args=String[] ) static signals SocketException

net_list = Enumeration /* **nonrx** <NetworkInterface> ** */

net_list = NetworkInterface.getNetworkInterfaces()

net_if = NetworkInterface

loop while net_list.hasMoreElements()

net_if = (NetworkInterface net_list.nextElement())

inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

inetAddresses = net_if.getInetAddresses()

say "Display name: "||net_if.getDisplayName()

say "Name: "||net_if.getName()

inetAddr = InetAddress

loop while inetAddresses.hasMoreElements()

inetAddr = (InetAddress inetAddresses.nextElement())

say inetAddr

end

Michael

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Michael (maillists) Dag

Re: Java2Nrx "educational" question...

In reply to this post by alansam

Thanks both of you for the additional insights!

From: [hidden email] [mailto:[hidden email]] On Behalf Of Alan Sampson
Sent: zaterdag 10 mei 2014 22:24
To: IBM Netrexx
Subject: Re: [Ibm-netrexx] Java2Nrx "educational" question...

Yep I did forget to mention LOOP OVER which is a pretty neat enhancement to NetRexx and way more expressive than the Java equivalent.

loop i = Iterator

i = Collections.list(nets).iterator() while i.hasNext()

I took a little extra time and recoded the Java as follows:

import java.io.*;

import java.net.*;

import java.util.*;

public class ListNets2 {

public static void main(String[] args) throws SocketException {

Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();

Iterator netsIter = Collections.list(nets).iterator();

while (netsIter.hasNext()) {

NetworkInterface netint = (NetworkInterface) netsIter.next();

displayInterfaceInformation(netint);

}

static void displayInterfaceInformation(NetworkInterface netint) /*throws SocketException*/ {

System.out.println("Display name: " + netint.getDisplayName());

System.out.println("Name: " + netint.getName());

Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();

Iterator netaddrIter = Collections.list(inetAddresses).iterator();

while (netaddrIter.hasNext()) {

InetAddress inetAddress_ = (InetAddress) netaddrIter.next();

System.out.println("InetAddress: " + inetAddress_);

}

System.out.println();

}

which renders the following NetRexx:

import java.io.

import java.net.

import java.util.

class ListNets2 public

method main( args=String[] ) static signals SocketException

nets = Enumeration /* **nonrx** <NetworkInterface> ** */

nets = NetworkInterface.getNetworkInterfaces()

netsIter = Iterator

netsIter = Collections.list(nets).iterator()

loop while netsIter.hasNext()

netint = NetworkInterface

netint = (NetworkInterface) netsIter.next()

displayInterfaceInformation(netint)

end

method displayInterfaceInformation( netint=NetworkInterface ) static

System.out.println("Display name: " || netint.getDisplayName())

System.out.println("Name: " || netint.getName())

inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */

inetAddresses = netint.getInetAddresses()

netaddrIter = Iterator

netaddrIter = Collections.list(inetAddresses).iterator()

loop while netaddrIter.hasNext()

inetAddress_ = InetAddress

inetAddress_ = (InetAddress) netaddrIter.next()

System.out.println("InetAddress: " || inetAddress_)

end

System.out.println()

Good luck,
Alan.

On 10 May 2014 12:54, Kermit Kiser <[hidden email]> wrote:

Alan forgot to mention that NetRexx 3.01 included an enhancement of the "LOOP" instruction allowing use of "OVER" with Java collections. A simple NetRexx code equivalent with "loop over" is this:

class ListNets public

    method main( args=String[] ) static signals SocketException

        nets = Enumeration /* **nonrx** <NetworkInterface> ** */
        nets = NetworkInterface.getNetworkInterfaces()

       netint = NetworkInterface
       loop netint over Collections.list(nets)
         displayInterfaceInformation(netint)
        end

    method displayInterfaceInformation( netint=NetworkInterface ) static signals SocketException

        say "Display name: " netint.getDisplayName()
        say "Name: " netint.getName()

        inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */
        inetAddresses = netint.getInetAddresses()

        inetAddress = InetAddress
        loop inetAddress over Collections.list(inetAddresses)
             say "InetAddress: " inetAddress
           end

        say "\n"

On 5/10/2014 11:26 AM, Alan Sampson wrote:

Michael,

As of Java 5 the looping construct [for] was enhanced to provide a "loop over" capability for members of the Collection classes. The Java syntax above is shorthand for:

for (Iterator i = Collections.list(nets).iterator(); i.hasNext();) {
NetworkInterface netint = (NetworkInterface) i.next();
displayInterfaceInformation(netint);
}

Regards,
Alan.

On 10 May 2014 06:00, <[hidden email]> wrote:
Found this piece of java code:

import java.io.*;
import java.net.*;
import java.util.*;
import static java.lang.System.out;

public class ListNets {

    public static void main(String args[]) throws SocketException {
        Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();
        for (NetworkInterface netint : Collections.list(nets))
            displayInterfaceInformation(netint);
    }

    static void displayInterfaceInformation(NetworkInterface netint) throws SocketException {
        out.printf("Display name: %s\n", netint.getDisplayName());
        out.printf("Name: %s\n", netint.getName());
        Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();
        for (InetAddress inetAddress : Collections.list(inetAddresses)) {
            out.printf("InetAddress: %s\n", inetAddress);
        }
        out.printf("\n");
     }
}

Java2Nrx-ed it to:

import java.io.
import java.net.
import java.util.

class ListNets public

    method main( args=String[] ) static signals SocketException
        nets = Enumeration /* **nonrx** <NetworkInterface> ** */
        nets = NetworkInterface.getNetworkInterfaces()
        for (netint = NetworkInterface
         : Collections.list(nets)) displayInterfaceInformation(netint)

    method displayInterfaceInformation( netint=NetworkInterface ) static signals SocketException
        say "Display name: " netint.getDisplayName()
        say "Name: " netint.getName()
        inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */
        inetAddresses = netint.getInetAddresses()
        for (inetAddress = InetAddress
         : Collections.list(inetAddresses)) say "InetAddress: " inetAddress

        say "\n"

when it try to compile this with nrc I get:

C:\NetRexx\java2nrx>nrc ListNets
NetRexx portable processor, version NetRexx 3.02, build 172-20130625-1742
Copyright (c) RexxLA, 2011,2013. All rights reserved.
Parts Copyright (c) IBM Corporation, 1995,2008.
Program ListNets.nrx
12 +++          : Collections.list(nets)) displayInterfaceInformation(netint)
    +++          ^
    +++ Error: Unexpected character found in source: ':' (hexadecimal encoding: 003A)
Compilation of 'ListNets.nrx' failed [one error]

I re-wrote part of this in another way,so I have the code working now…
but I fail to understand what the bold orange part does or what it is supposed to translate into?
Can someone shed some light on this for me please?
It feels I took the long way home and fail to see the short cut…

Working different nrx code but doing the same…

import java.io.
import java.net.
import java.util.

class ListNetsx public

    method main( args=String[] ) static signals SocketException
        net_list = Enumeration /* **nonrx** <NetworkInterface> ** */
        net_list = NetworkInterface.getNetworkInterfaces()
        net_if = NetworkInterface
        loop while net_list.hasMoreElements()
          net_if = (NetworkInterface net_list.nextElement())

          inetAddresses = Enumeration /* **nonrx** <InetAddress> ** */
          inetAddresses = net_if.getInetAddresses()
          say "Display name: "||net_if.getDisplayName()
          say "Name: "||net_if.getName()
          inetAddr = InetAddress
          loop while inetAddresses.hasMoreElements()
            inetAddr = (InetAddress inetAddresses.nextElement())
              say inetAddr
          end
        end

Michael

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