can you complete java code for main method, just for what i write in bold

Write a java program (xxxxxp1.java where xxxxx is the first five characters of your last name and p1 is the project number) that contains the following methods:

1. A method that returns 2^nd largest in an array with n elements.
2. A method that prints (formatted) array elements 10 elements per line.
3. A mergesort method that mergesorts array elements in descending order.
4. A binary search method that searches x in a sorted array with n elements and returns its position if exist, -1 otherwise.

public static void main(String args[]) throws exception{

try{

Scanner inf = new Scanner (System.in);

n = inf.nextInt(); // read no. of input

xxxxxp1 p1 = new xxxxxp1 (n);

read n integers and store them in array arr and print arr(formatted) 10 elements per line. (40 pts)

find 2^nd largest and print it. (40 pts)

mergesort array arr and print arr(formatted) 10 elements per line. (80 pts)

k = inf.nextInt(); // read no. of elements to search

read k keys to search using binary search and print their position in array arr. (40 pts)

}catch (Exception e) {prt(" Exception " + e + " ");}

}// end main method