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generics

How-to articles, tricks, and solutions about GENERICS

Create instance of generic type in Java?

To create an instance of a generic type in Java, you can use the newInstance() method of the Class class, along with the Type and TypeVariable classes.

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Get generic type of class at runtime

If you want to get the generic type of a class at runtime, you can use the Type class in the System namespace.

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How do I address unchecked cast warnings?

An unchecked cast warning in Java occurs when the compiler cannot verify that a cast is safe at compile time.

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How do I get a class instance of generic type T?

To get a class instance of a generic type T, you can use the new operator and specify the type argument when creating an instance of the class. Here's an example:

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How do I make the method return type generic?

To make the return type of a method generic in Java, you can use a type parameter. A type parameter is a placeholder for a specific type that will be specified when the method is called.

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How to create a generic array in Java?

In Java, it is not possible to create a generic array directly. However, you can create an array of a specific type and then cast it to a generic type.

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How to use Class<T> in Java?

In Java, the Class<T> class represents the class or interface type of a class at runtime.

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What causes javac to issue the "uses unchecked or unsafe operations" warning

The javac compiler may issue the "uses unchecked or unsafe operations" warning if your code uses operations that may result in an Unchecked warning at runtime.

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What is SuppressWarnings ("unchecked") in Java?

@SuppressWarnings("unchecked") is an annotation in Java that tells the compiler to suppress specific warnings that are generated during the compilation of the code.

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