understanding and implementing custom class in java

I am very new to class programming and I am trying to implement the class I have created in my application program so I have some questions on how to do so I will specify below...

[Inside application program] the user will enter a int, lets say int number.

This int number will than be sent as a parameter to my class myClass to an accessor method in myClass titled numberSearch where this method will see if number exists inside an array. Where I am having the most trouble is...

[inside the application program] checking to see if(number == any of the array integers)

which is where shows my complete lack of understanding of getting use to using my own classes. please please help me understand how to do this! Thanks guys! :)