Java Generic Plz Help

I have to write a following program....can any one suggest me how to start i am not use to with hava generics classes...
Write a generic class called Gennow that has one type parameter. It should contain contains three methods, first() and second(), and third(), that return one of the three items respectively. Include a main method in the class which creates a Gennow object with a String type. The object should be created with three strings: "abc", "def", "ghi". Use the first(), second(), and third() methods to get each string from the Gennow object and print it. cann't use array...

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