Why am I getting a compile time error for the two method headers at the end of my code in my class ArrayListTest?

ArrayListTest: http://pastebin.com/dUHn9vPr

Student: http://pastebin.com/3Vz1Aytr

I have a compiler error at the two lines:

delete(CS242, s3)

replace(CS242, s, s4);

When I try to run the code it states:

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
    The method replace(ArrayList<Student>, Student, Student)in the type ArrayListTest is not applicable for the arguments (List<Student>, Student, Student)
    The method delete(ArrayList<Student>, Student) in the type ArrayListTest is not applicable for the arguments (List<Student>, Student)
        at ArrayListTest.main(ArrayListTest.java:54)

I fixed the compile time errors since I use Eclipse and Eclipse gives options of code you can use to fix the compile time error. I chose to "Change method to 'replace(ArrayList, Student, Student)' to 'replace(List, Student, Student)'

Although it fixed that compile time error, I don't understand why I was getting a compile time error to begin with and why that effectively fixed the error

I don't really know what missing code I need to write to correct these two methods below:

public static void replace(List<Student> cS242, Student oldItem,
                Student newItem) {

public static void delete(List<Student> cS242, Student target){