Drools : How to get String in List<String> - string

Question

I want to get String in List< String > but did not work.
Drools Rule
import schedule.Schedule
import schedule.Control_Exam_List
rule "People"
salience 5
when
$controlExamList : Control_Exam_List( ) from accumulate( $scheduleCheck : Schedule( $scheduleCECheck1 : control1 , $scheduleCECheck2 : control2 , $scheduleCECheck3 : control3 ) ,
init( Control_Exam_List CEL = new Control_Exam_List(); ),
action( CEL.addData($scheduleCECheck1); CEL.addData($scheduleCECheck2); CEL.addData($scheduleCECheck3); ),
result( CEL ) )
then
System.out.println("Test1: "+$controlExamList);
end
The result return list but I get all string from this list.
Result : Still list< String >
Test1: schedule.Control_Exam_List#22916a
Control_Exam_List Class : List< String >
import java.util.ArrayList;
import java.util.List;
public class Control_Exam_List {
private List<String> code = new ArrayList<String>();
public void addData(String code){
if(this.code.contains(code) != true && !code.equals(""))
this.code.add(code);
}
public List<String> getCode() {
return code;
}
}
Schedule Class : Accumulate from this class
public class Schedule {
private String control1 = "", control2 = "", control3 = "";
public String getControl1() {
return control1;
}
public String getControl2() {
return control2;
}
public String getControl3() {
return control3;
}
public void setControlExam1(String ce_code) {
this.control1 = ce_code;
}
public void setControlExam2(String ce_code) {
this.control2 = ce_code;
}
public void setControlExam3(String ce_code) {
this.control3 = ce_code;
}
}

Answer 1

This is almost as you'd do it Java, with $controlExamList being bound to a Control_Exam_List object; although, in Drools, you may have to cast:
then
for( Object obj: $controlExamList.getCode() ){
System.out.println( (String)obj );
}
end
But you can also try:
then
for( String str: $controlExamList.getCode() ){
System.out.println( str );
}
end