Converting ArrayList to HashMap

Question

Possible Duplicate    Java  How to convert List to Map       I have arrayList  ArrayList lt Product gt  productList    new ArrayList lt Product gt      productList    getProducts       Fetch the result from db   I want to convert to ArrayList to HashMap Like this    HashMap lt String  Product gt  s  new HashMap lt String Product gt       Please help me how to convert to HashMap

User · Accepted Answer

The general methodology would be to iterate through the ArrayList  and insert the values into the HashMap   An example is as follows   HashMap lt String  Product gt  productMap   new HashMap lt String  Product gt     for  Product product   productList       productMap put product getProductCode    product

User · Answer

edited   using your comment about productCode  and assuming product code is a String  as reference      for Product p   productList           s put p getProductCode     p

User · Answer

Using a supposed name property as the map key   for  Product p  productList    s put p getName    p

[java] Converting ArrayList to HashMap

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