• Java is strongly typed checking, that means each data value is associated with a particular type.
• It is sometimes helpful or necessary to convert a data value of one type to another type, but we must be careful that we don’t lose important information in the process
• There is strict enforcement of type rules
– Widening Conversions – Narrowing Conversions
• Note that Widening a type can be performed automatically without explicit casting. Narrowing a type must be performed explicitly