AgentBase for SICStus Prolog

AgentBase for SICStus Prolog
Swedish Institute of Computer Science
http://www.sics.se/isl/agentbase/

Example - Jeval - single user GUI

This is a simple example of communication between Java and Prolog where Java is the server and prolog is the client.

Instructions

1. Change directory to jeval/ and start a jeval server with

java -jar jeval.jar

The server will listen for connections at port 7138.

2. Change directory to examples/jeval/ and start sicstus with

sicstus -l jeval_eval

Then start the jeval client with start.. It will connect to the server and send information about how its GUI should look like in Java code (BeanShell scripted). In this example it is the following code that describes the GUI:

   jeval:jeval('window=new JFrame("Jeval Demo");\c
                pane = window.getContentPane();\c
                pane.setLayout(new GridLayout(0,1));\c
                pane.add(new JLabel("Enter expression"));\c
                expr = new JTextField("5 * 7");\c
                pane.add(expr);\c
                result = new JLabel("Result:");\c
                pane.add(result);\c
                button = new JButton("Evaluate!");\c
                pane.add(button);\c
	        window.show();\c
	        window.pack();\c
	        window.setLocation(100, 100);\c
                jeval.addActionListener("button");\c
                jeval.addActionListener("expr");')

When you have successfully started the jeval_eval example you will see a small window looking like the screenshot below.

Source Code

The code of the Jeval example jeval_eval.pl.