Why are superclass The superclass is parameterized in JAVA [closed]

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package com.android.example.spinner.test;

import com.android.example.spinner.SpinnerActivity;

impo开发者_JAVA技巧rt android.test.ActivityInstrumentationTestCase2;

public class SpinnerActivityTest extends
  ActivityInstrumentationTestCase2<SpinnerActivity> {



}

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This is because we are declaring that SpinnerActivityTest is a specific type of ActivityInstrumentationTestCase2 – one that deals in some way with SpinnerActivity objects.

As to how SpinnerActivity is significant to the TestCase class, well, you would have to look at the class concerned.