[apfroggy0408]

Code:

ArrayList<String> mm = new ArrayList<String>();
        	Scanner input = new Scanner(System.in);
        
       	 	System.out.println("Enter the string: ");
        	String str = input.nextLine().trim();
        
        	System.out.println("Enter an index: ");
        	int index = input.nextInt();
        
        	mm[index] = str;  <---
        	System.out.println(mm);
        	System.out.println(index);
        	
        	for (int k = 0; k < size; k++)
        		System.out.println(mm[k]); <--

Why won't this work?

array required, but java.util.ArrayList<java.lang.String> found
array required, but java.util.ArrayList<java.lang.String> found

errors occur at arrows.