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  1. import java.sql.Timestamp;
  2. import java.time.Instant;
  3. import java.time.temporal.ChronoUnit;
  4.  
  5. class Ideone {
  6.  
  7. public static void main (String[] args) {
  8. Timestamp timestamp = Timestamp.from(Instant.now());
  9. System.out.println(timestamp);
  10. System.out.println(Timestamp.from(timestamp.toInstant().minus(3 * 7L, ChronoUnit.DAYS)));
  11. }
  12. }
Success #stdin #stdout 0.08s 34556KB
stdin
Standard input is empty
stdout
2020-08-20 20:29:10.797365
2020-07-30 20:29:10.797365