Java Generics Tutorial
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- Java Generics - Parameterized Types
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- Type Parameter Naming Conventions
- Java Generics - Generic Classes
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- Java Generics - Overview
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Java Generics - No Array
Java Generics - No Array
Arrays of parameterized types are not allowed.
//Cannot create a generic array of Box<Integer> Box<Integer>[] arrayOfLists = new Box<Integer>[2];
Because compiler uses type erasure, the type parameter is replaced with Object and user can add any type of object to the array. And at runtime, code will not able to throw ArrayStoreException.
// compiler error, but if it is allowed Object[] stringBoxes = new Box<String>[]; // OK stringBoxes[0] = new Box<String>(); // An ArrayStoreException should be thrown, //but the runtime can t detect it. stringBoxes[1] = new Box<Integer>();Advertisements