Misc Unit 2

Question 1

Integer.parseInt(s1)

Answer 1

converts a string like “10” to an Integer

Question 2

ZonedTime.parse(str)

Answer 2

converts a string to ZonedDateTime
“yyyy-mm-ddThh:mm:ss+Z” (Z=offset, aka +1:00)
see baeldung.com/java-format-zoned-datetime-string

Question 3

difference between (using BigDecimal):
1. return balance.add(amount);
2. balance = balance.add(amount);
    return balance;

Answer 3

1. just adds them and returns sum, doesn’t change balance

2. adds them and replaces balance with sum, then returns new balance