Student line up a teacher has asked all her students to line up single file according to their first name. for example, in one class amy will be at the front of the line and yolanda will be at the end. write a program that prompts the user to enter the number of students in the class, then loops to read that many names. once all the names have been read it reports which student would be at the front of the line and which one would be at the end of the line. you may assume that no two students have the same name. input validation: do not accept a number less than 1 or greater than 25 for the number of students.

You need to write some code that responds to a text change in a jtextfield. how can you do that? create a class that implements the interface actionlistener and override the method textfieldchanged create a class that extends the superclass actionlistener and override the method actionperformed create a class that implements the interface actionlistener and override the method actionperformed create a class that extends the superclass actionlistener and override the method textfieldchanged

Idon understand these and need some ! ?

Write a car class having two private member variables called tank and speed. write public methods called pumpgas and gofast. the method pumpgas gets an integer for gas that must be pumped. that value needs to be added to tank (no more than 20 gallons). it must return the amount of gas that is purchased ($4 per gallon). the method gofast should increase the speed by 5 each time it is called. write a constructor for the above class that initialized both variables to zero. write a tostring to display both the tank and speed when the car is printed. modify the car class to implement the interface comparable and an interface called carinter having the public methods in carinter. write the main program to create an array of size 5 of type car. create 5 car objects having each location of the array to refer to one of the cars. test the pumpgas, gofast, equals method on the array items. write an enhanced loop to print all the car values (using a tostring written last time).write a generic method to find the minimum of four items. pass int, double, char, string and car objects to test this method.