Simplest Sample Class for Calling R from Java

import java.awt.Component;

import javax.swing.JFrame;

import org.rosuda.JRI.Rengine;
import org.rosuda.javaGD.GDInterface;
import org.rosuda.javaGD.JGDBufferedPanel;



public class TryR6 extends GDInterface
{
	JFrame f;
	public void gdOpen(double w, double h) 
	{
		if (f!=null) gdClose();
        f = new JFrame("JavaGD Example");
    
        c = new JGDBufferedPanel(w, h);
        f.getContentPane().add((Component) c);
        f.pack();
        f.setVisible(true);
	}
	
	public static void main(String args[])
	{
		Rengine engine = new Rengine(new String[]{ "--vanilla" }, false, null);    
		
		engine.eval(".setenv <- if (exists(\"Sys.setenv\")) Sys.setenv else Sys.putenv");
		engine.eval(".setenv(\"JAVAGD_CLASS_NAME\"=\"TryR6\")");
        engine.eval("library(JavaGD)");
        engine.eval("JavaGD()");
        engine.eval("plot(rnorm(100))"); 
	}

}
import java.awt.Component;

import javax.swing.