Here you go. I added a constructor and a toString overload to make the object creation and printing as easy as possible.
public class student {
 private String _id;
 private String _name;
 private String _address;
 public student(String id, String name, String address) {
 _id = id;
 _name = name;
 _address = address;
 }
 public String toString() {
 return "Id: " + _id + "\\Name: " + _name + "\\Address: "+ _address;
 }
 public static void main(String[] args) {
 student s1 = new student("S12345", "John Doe", "Some street");
 System.out.println(s1);
 }
}