The program language we use to declare for those case is Java.
The code for case 1 is,
File myFile;
This code is declaring the new File data type with name myFile in Java.
The code for case 2 is,
Menu myMenu[];
This code is declaring the new Menu objects with name myMenu that can holding references to Menu object.
The code for case 3 is,
myString = new String("Word");
We create string object of "Word" to assigned to myString variable. The myString variable doesn't written in here since the myString variable has been declared in the case.
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