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ArrayOfGeneric.java
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28 lines (27 loc) · 910 Bytes
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// generics/ArrayOfGeneric.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
public class ArrayOfGeneric {
static final int SIZE = 100;
static Generic<Integer>[] gia;
@SuppressWarnings("unchecked")
public static void main(String[] args) {
try {
gia = (Generic<Integer>[])new Object[SIZE];
} catch(ClassCastException e) {
System.out.println(e.getMessage());
}
// Runtime type is the raw (erased) type:
gia = (Generic<Integer>[])new Generic[SIZE];
System.out.println(gia.getClass().getSimpleName());
gia[0] = new Generic<>();
//- gia[1] = new Object(); // Compile-time error
// Discovers type mismatch at compile time:
//- gia[2] = new Generic<Double>();
}
}
/* Output:
[Ljava.lang.Object; cannot be cast to [LGeneric;
Generic[]
*/