sqrt(36)

RSample.java

package rJava;

import org.rosuda.JRI.REXP;
import org.rosuda.JRI.Rengine;

public class RSample {
 public static void main(String[] args) {
  System.err.println(System.getenv("R_HOME"));
  System.err.println(System.getenv("java.library.path"));

  Rengine engine = new Rengine(new String[] {
   "--no-save"
  }, false, null);
  engine.assign("a", new int[] {
   36
  });
  REXP result = engine.eval("sqrt(a)");
  System.out.println(result.asDouble());
  engine.end();
 }
}