hibernate - hbm files attributes use -


I am new to hibernate, and While writing one of the Hbm files, some questions are raised in my head and posted on them, so in hopes of getting the answer

Question: We map pojo property in DB fields 

  & lt; Property name = "birth_dt" type = "date" & gt; & Lt; Column name = "BIRTH_DATE" height = "4" /> & Lt; / Property & gt;   
 How to  Type  help / does not help in the attribute tag and what is the difference between the "date" and "java.util.Date" type is ? How does the  length  feature help / non-help inside the column tag?  
 What do I understand: what is the use of these attributes  
 TIA   
 
 
 Type: This is type from the hibernate type system. For example, you can use a custom type here. During the type of mapping of the basic types, there is no difference in specifying the Java type name or hibernate type.  
 Length: It is used for schema generation which supports the length, such as varchar.

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