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I understood the spoon-feeding problem....and i assure i will not repeat this...

//Creating Object To The Class APPoint using new() poerator which dynamically allocates space in heap
APPoint a = new APPoint (25.3, -6.8);
//when an object is created to the class then...

hii...
Instead of using multiple scanners use only one scanner to read all the input values of different formats...
for example..
//create Scanner
Scanner s = new Scanner(System.in);
//so you...

hii....
initially initialise top = -1 and variable max with some value......
suppose max = 4;
...removed spoonfed code

...spoonfeeding removed

hii....the code below can solve your problem...
...