新手求解 客户端代码

服务端代码:
package voluntee.Attendance.System.EJ;

public class DataVolunteeAttendanceSystemEJ {
 private int memberId;

 public int getMemberId() {
  return memberId;
 }

 public void setMemberId(int memberId) {
  this.memberId = memberId;
 }
}

....................................................................................................................
我想把memberId 值变成12345  然后在荧幕打印出来, 客户端代码要怎麼写?
(最好给个完整的)