How do you cast a List of supertypes to a List of subtypes?

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面向向阳花 2020-11-22 08:43

For example, lets say you have two classes:

public class TestA {}
public class TestB extends TestA{}

I have a method that returns a L


      
      
        
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                   深忆病人
                                             
                
                
                (楼主)
            
              
              
                2020-11-22 09:01
              

            
            
                        
class MyClass {
  String field;

  MyClass(String field) {
    this.field = field;
  }
}

@Test
public void testTypeCast() {
  List