Explanation
1. Perform stronger type checking during compilation.
2. The Java compiler checks the strong type of the generic code and if the code violates type safety.
will go wrong. Fixing compile-time errors is easier than fixing run-time errors, which may be difficult to find.
3. Eliminate display type conversion.
4. After encoding using generic reconstruction, you can see that there is no need for forced conversion.
This will bring great convenience to programmers.
Enables programmers to implement general algorithms. By using generics, programmers can implement generic algorithms that integrate different types, can be customized, are type-safe and easy to read.
Example
List<String> list = new ArrayList<String>(); list.add("hello"); String s = list.get(0); // no cast
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