public List<StudentInfo> getStudent(ClassInfo cls) {
		List<CourseEnrollment> erlList = getCourseEnrollment(cls);
		StudentManager studentManager = StudentManager.getInstance();
		List<StudentInfo> allStd = studentManager.getStudent();
		List<StudentInfo> clsStd = new ArrayList<StudentInfo>();
		if ((allStd != null) && (allStd.size()>0)) {
			for(CourseEnrollment erl: erlList) {
				String crtStd = erl.getErlStudent().getStudentID();
				for (StudentInfo std: allStd) {
					if (crtStd.equalsIgnoreCase(std.getStudentId())) {
						clsStd.add(std);
						break;
					}
				}
			}
		}
		return clsStd;
	}