JDK packages structure
![](http://orm-chimera-prod.s3.amazonaws.com/1234000001805/figs/lj4e_0207.png)
User defined package
User defined packages are nothing but placing the right class files in right place (package).
For example,
Consider a banking application which has multiple account opening procedures.
We will have an multiple account opening classes and placed under account opening package.
com.companyname.banking.accountopening
- SavingsAccountOpen
- FixedAccountOpen and etc..
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