timestamp formatting in scala [duplicate]

问题:

This question already has answers here:

want current date and time in “dd/MM/yyyy HH:mm:ss.SS” format (9 answers)

Formatting timestamp in Java (3 answers)

Closed 2 years ago.

IP:

test: String = 2018-10-12 07

Expected OP:

test_timestamp: Timestamp = 2018-10-12 07

Code:

val format1 = new SimpleDateFormat("yyyy-MM-dd HH")
var d = format1.parse(test)
var date =    new Date(d.getTime())
var timestamp = new Timestamp(d.getTime())

My OP:

timestamp: java.sql.Timestamp = 2018-10-12 07:00:00.0

I am trying to convert to the same datehour format.

Code:

var dateFormat = new SimpleDateFormat("yyyy-MM-dd HH");
timestamp = dateFormat.format(timestamp);

Error:

found   : String
required: java.sql.Timestamp
timestamp = dateFormat.format(timestamp);
                                ^

the variable "timestamp" is clearly of type java.sql.Timestamp, so I am not able to understand the issue. Any suggestions.