参考： https://vladmihalcea.com/the-best-way-to-implement-equals-hashcode-and-tostring-with-jpa-and-hibernate/ https://vladmihalcea.com/how-to-implement-equals-and ...

`参考：[https://www.journaldev.com/21095/java-equals-hashcode](https://www.journaldev.com/21095/java-equals-hashcode)` https://vladmihalcea.com/the-best-way-to ...

I have a class, say TextHolder, that overrides Object.equals() to return true if both strings in each object are equal - <tt>new TextHolder("Hello World!").equals(new ...