Yes, if:

1) your bean class implements Comaparable and you implement
  compareTo() right, or

2) you create a Comparator class and send an instance of that as the
  second argument to sort().

Depends on how you want them sorted and if you allow nulls.

Here we'll assume you don't allow nulls and you want  Students sorted
by name, then number.

public class Student implements Comparable {

 private String studentName = null;
 private String mobileNumber = null;

 public Student(String name, String number) throws
NullPointerException {
    //we hate nulls so we won't allow them. You can change this of
course...
    if (name == null || number == null) {
      throw new NullPointerException("Student instances requires a
valid name and number parameter");
    }
    else {
      this.studentName = name;
      this.mobileNumber = number;
    }
  }

  ...

  public int compareTo(Object o) throws ClassCastException {
    Student other = (Student) o;
    int comp = this.studentName.compareTo(other.studentName);
    if (comp == 0) {
      return this.mobileNumber.compareTo(other.mobileNumber);
    }
    else {
      return comp
    }
  }
 }

HTH.