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Message |
< Erlang ~ Erlang port + java while loop |
| ea6611 |
 Posted: Mon May 17, 2010 5:28 pm |
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User
Joined: 30 Apr 2010
Posts: 5006
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Hi,
I am using open_port and port_command to interact with a java program.
The java program is simple and works fine with erlang:
Code:
import java.util.Scanner;
import java.lang.String;
public class ReadString {
public static void main(String[] args) {
String dest,command,body;
System.out.println("inside main********");
Scanner in = new Scanner(System.in);
command = in.next();
System.out.println("JavaCommand :"+command);
if (command.equals("test"))
System.out.println("Testing : "+command+" OK");
if (command.equals("exit"))
in.close();
}
}
Now I want to add a while loop to keep the java prog running:
Code:
import java.util.Scanner;
import java.lang.String;
public class ReadString {
public static void main(String[] args) {
String dest,command,body;
System.out.println("inside main********");
Scanner in = new Scanner(System.in);
do
{
command = in.next();
System.out.println("JavaCommand :"+command);
if (command.equals("test"))
System.out.println("Testing : "+command+" OK");
if (command.equals("exit"))
in.close();
}while(!command.equal("exit"));
}
}
this compiles right but at the execution nothing happens (even the "inside main********" doesn't show up)
is there something else to import? |
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| Michal Ptaszek |
| Posted: Wed May 19, 2010 2:35 pm |
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User
Joined: 01 May 2008
Posts: 35
Location: Krakow
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I think Java should have some kind of System.out.flush() somewhere. When I was using Erlang and Python scripts as external ports it turned out to be very helpful when forcing messages to appear on the other side.
Moreover, if you would like to bind java and erlang, look at the Jinterface: http://www.erlang.org/doc/apps/jinterface/jinterface_users_guide.html |
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| ponik |
| Posted: Mon Aug 29, 2011 9:09 am |
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Joined: 29 Aug 2011
Posts: 4
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| Good work chap, continue doing. Think some kind of System.out.flush () is there somewhere in Java. Long time back when I was using Erlang and Python scripts as external ports, I tried to force messages to appear on the other side and it drive out to be very helpful with ingersoll rand security technologies . Moreover, if you would like to bind java and erlang, there is lots of information available in net. |
Last edited by ponik on Mon Sep 05, 2011 7:16 am; edited 1 time in total |
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| wuji |
| Posted: Fri Sep 07, 2012 6:58 am |
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User
Joined: 10 Aug 2012
Posts: 654
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| dongdongwu |
| Posted: Wed Sep 19, 2012 8:27 am |
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Joined: 19 Sep 2012
Posts: 236
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