cannot be applied to given types

[Tom Cummings]

import java.util.*;
public class MyLists12{
	// default values for first and last name and cousre for no arg constructor 
	private String firstName ="Thomas";
	private String lastName ="Cummings";
	private String course ="CS 1301 A";
	// Setup a pattern to read for each type
	private String integerPattern = "^[0-9]*$";
	private String decimalPattern = "^(-|\\+)?[0-9]*(\\.)+[0-9]*$"; 
	private String alphabetPattern = "^[a-zA-Z]*$";
	private String alphabetNumericPattern = "^[a-zA-Z0-9]*$";
	 
	 
	// no arg constructor
	public MyLists12(){
	
	}
	// 3 arg constructor
	public MyLists12(String first, String last, String course){
		firstName = first;
		lastName = last;
		this.course = course;
	
	}
	// Populate list method 
		public void populateLists (Scanner input, ArrayList <String> all,
			ArrayList <Integer> integerList,
			ArrayList <Double> doubleList,
			ArrayList <String> alphabetList,
			ArrayList <String> alphaNumericList,
			ArrayList <String> othersList)
		{
			/////////////							
			String token;
			while (input.hasNext()){
				token = input.next();
				//Add to all list
				all.add(token);
				//Check for integer values
				if (token.matches(integerPattern)){
				   int n = Integer.parseInt(token);
					integerList.add (n);
				}
				else {
					//Check for decimal values
					if (token.matches (decimalPattern)){
						double value = Double.parseDouble(token);
						doubleList.add(value);
					}
					else
						//Check for alphabets	
						if (token.matches(alphabetPattern))
					   	alphabetList.add(token);
						else
							//Check for alphabets	
							if (token.matches(alphabetNumericPattern))
						   	alphaNumericList.add(token);
				}
			
		}
	}
	public double average(int [] list){
		if (list == null)
        return -9999;
		int average = 0;
		for (int i = 0; i < list.length; i ++)
			average += list[i];
		return (double)average / list.length;
	}
	public double largest(double [] list){
		if (list == null)
        return -9999;
		double largest = list[0];
		for (int i = 1; i < list.length; i ++)
			if (largest < list[i]){
            largest = list[i];
        }
		return largest;
	}
	public String longest(String [] list){
		if (list == null)
        return "Empty list";
		String longest = list[0];
		for (int i = 0; i < list.length; i ++)
			if (longest.length() < list[i].length()){
            longest = list[i];
        }
		return longest;
	}
	
	public void printList (String listName, ArrayList list ){
		System.out.print ("\n"+ listName+"\t");
		for (int i = 0; i < list.size();i++){
			if (i % 5 == 0)
				System.out.println();
			System.out.printf ("%-10s\t", list.get(i));
		}
		System.out.println();
	}
			
	public String toString (){
		String result = "\n\n\t\t" +firstName + " " + lastName;
		result += "\n\t\t" + course;
		return result;
	}
	
	
}

import java.io.*;
import java.util.*;
public class TestMyList12{


	public static void main(String[] args) throws IOException {
	
		//Declarations
		ArrayList <String> allList = new ArrayList <String>();
		ArrayList <Integer> integerList = new ArrayList <Integer>();
		ArrayList <Double> doubleList = new ArrayList <Double>();
		ArrayList <String> alphabetList = new ArrayList <String>();
		ArrayList <String> alphaNumericList = new ArrayList <String>();
		ArrayList <String> othersList = new ArrayList <String>();

		//Read the name of the input file as an arhument
		//and Create an object of the input file 
		File infile = new File (args[0]);
		Scanner scan = new Scanner (infile);
		//Invoke the no-argument constructor
		MyLists12 unkown = new MyLists12();
		//Invoke the overloaded constructor
		MyLists12 mylists = new MyLists12("John", "Smith", "CS1301");
		//Invoke the toString method
		System.out.println (unkown);
		System.out.println (mylists);
		//Invoke populateLists method to read data from input file and store them in different lists
		mylists.populateLists(scan,allList,integerList,doubleList,alphabetList, alphaNumericList,othersList);
		//Print different lists
		mylists.printList ("All List      ", allList);
		mylists.printList ("Integer List      ", integerList);
		mylists.printList ("Double List       ", doubleList);
		mylists.printList ("Alphabet List     ", alphabetList);
		mylists.printList ("Alpha Numeric List", alphaNumericList);
		mylists.printList ("Other List        ", othersList);

		//System.out.println ("\n\nThe Average of integer values is:\t" + mylists.average(integerList));
		//System.out.println ("\nThe largest of double List is:     \t" + mylists.largest(doubleList));
		//System.out.println ("\nThe Longest alphabetic word is:    \t" + mylists.longest(alphabetList));
		System.out.println ("\nThe Longest alphaNumeric word is:  \t" + mylists.longest(alphaNumericList));
		
	}
}

System.out.println ("\n\nThe Average of integer values is:\t" + mylists.average(integerList)); This part gives me this error: MyList12 cannot be applied to given type and I'm not sure why.

[Campbell Ritchie]

Welcome to the Ranch

Tom Cummings wrote: . . .
System.out.println ("\n\nThe Average of integer values is:\t" + mylists.average(integerList)); This part gives me this error: MyList12 cannot be applied to given type and I'm not sure why.

Your integer list is a List of some sort and the method seems to take an int[] as a parameter. You need to ensure that you call the methods with the right arguments. You may wish to overload that method to take the list.
Your indenting is peculiar: it is usual to indent else ifs like this

if (b)
{
   //...
}
else if (b1)
{
   //...
}
else if (b2)
{
   //...
}
else
{
   //...
}

Also use spaces, not tabs for indenting.
Avoid numbers: classes like MyLists12 (whose spelling varies in your post) are confusing because you can’t always remember the difference from MyLists11.
Avoid use of the \n character unless you specifically want LF; use the %n tag instead.

[Winston Gutkowski]

Tom Cummings wrote:System.out.println ("\n\nThe Average of integer values is:\t" + mylists.average(integerList)); This part gives me this error: MyList12 cannot be applied to given type and I'm not sure why.

Neither are we unless you can tell us where this error is occurring.

However, the whole class seems a bit tortuous. From its fields, I would assume that it defines a List element, but then you have a pile of methods that appear to be based on Lists.

My suggestion: back up a bit and write down what you want, NOT how you want to do it. And just off the top of my head, a Student class (or something like it) sounds to me like a pre-requisite.

Winston

PS: I broke up that enormous line. Please re-read the UseCodeTags page for details.
Also, your populateLists() method is awful. Dealing with that many parameters (most of them Lists) is likely to be an absolute nightmare.