trying to understand generic Syntax

[cris9288]

Hell, I am trying to understand how to use parameterized types and I keep getting confused as to what my AnyType variable refers to. I have an example that I have been working with. In this example, Shape implements comparable and Rectangle implements Shape.

import java.util.ArrayList;
import java.util.List;


public class GenericInsertionSort {
    
    private static class DefaultComparator<AnyType extends 
            Comparable<? super AnyType>> implements Comparator<AnyType>{
        
        @Override
        public int compare(AnyType lhs, AnyType rhs) {
            
            return lhs.compareTo(rhs);
        }
    }
    
    public static <AnyType> void insertionSort(List<AnyType> myList, 
            Comparator<? super AnyType> cmp) {

        for (int p = 1; p < myList.size(); p++){
            AnyType temp = myList.get(p);
            int j = p;
            
            for (; j > 0 && cmp.compare(temp, myList.get(j-1)) < 0; j--)
                myList.set(j, myList.get(j - 1));
            myList.set(j, temp);
        }
        
        
        
    }

   
    public static void main(String[] args) {
        
        ArrayList<Integer> myInts = new ArrayList<Integer>();
        List<Rectangle> shapeList = new ArrayList<Rectangle>();
        
        shapeList.add(new Rectangle(10, 12));
        shapeList.add(new Rectangle(11, 15));


        insertionSort(shapeList, new DefaultComparator<Shape>());

    }
}

In this example, what is AnyType (in my insertionSort method) referring to? Is it shape or rectangle? I know that my comparator is of type Shape, and myList is of type Rectangle, I just don't understand how the method call is resolved. Thanks!

[DarrylBurke]

AnyType is what its name suggests.
Lesson: Generics (The Java™ Tutorials > Learning the Java Language)

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