How to merge Two arrays in java in to single One and finding greatest number

Task Two:

we can merge two arrays into single One .This task is only for beginner in java i hope .This solution makes you clear .

Task Three:

 Finding greatest number as user inputs the number , it has some logic inside ,when users input three number lets suppose f1,f2,f3 , we use nested if loops and compare those  numbers with each others as you can see in the code given below.