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Tag: boolean

JPA repository Boolean Query – return null pointer exception

I have Java springBoot project With repository that included boolean custom query. but the system run to null pointer exception apart from return “false”. this is the query: I called the method: and this is the error: Answer Your query is designed to return whatever entity (called CustomersVsCoupons from now on) is mapped to the table customer_vs_coupons, not a Boolean.

Java Boolean method return is always false [closed]

Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. Closed 9 months ago. Improve this question

Are booleans implicitly true?

I’m a bit confused on this bit of code. My professor explained that the output will always be true but I’m confused on why. I changed the boolean to both true and false but the output is always true and I’m having a hard time explaining the logic behind it. I assumed that since a false && true will always

simple java program returning incorrect value

Hello I am brushing up on Java practice. I have this very simple program: There are two int values, along with a boolean variable. i) The program will return true if one of these values is negative and one is positive. ii) However, if the boolean variable is true, the program can only return true if both int values are

how to traverse a Boolean recursion array

The exercise: Build a recursion(with no loops) that every cell that you go inside is the number of steps that you can go, it could be right/left until you get to the last cell. if you can’t get to the last cell return false, else return true. you must start from index 0. My problem: I build the program, it’s