My code is not working after firebase databasereference

Question

I am new to firebase .I started loading data into realtime database .It works fine but when i want to retrieve data from realtime database the data is restored from database but the code after the retrieval is not working.In the below case i can't see the Log "exited all yes" .Why is this happening?Since I am using singlevalue event i need not close the reference right?

FirebaseDatabase fire=FirebaseDatabase.getInstance();
            DatabaseReference ref=fire.getReference("Users/"+userid+"/hisnumber");
            ref.addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {

                    se1 = (String) dataSnapshot.getValue();
                    System.out.println(se1);
                }

                @Override
                public void onCancelled(@NonNull DatabaseError error) {
                    System.out.println("The read failed: " + error.getCode());

                }
            });
            ref=fire.getReference("Users/"+userid+"/hisname");
            ref.addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {

                    se2 = (String) dataSnapshot.getValue();
                    System.out.println(se2);
                }

                @Override
                public void onCancelled(@NonNull DatabaseError error) {
                    System.out.println("The read failed: " + error.getCode());

                }
            });
            Log.d("exited all","yes");