import java.sql.Timestamp;
import java.time.Instant;
import java.time.temporal.ChronoUnit;
class Ideone {
public static void main
(String[] args
) { System.
out.
println(timestamp
); System.
out.
println(Timestamp.
from(timestamp.
toInstant().
minus(3 * 7L, ChronoUnit.
DAYS))); }
}
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