Code a method in java called diffArList that:

• Takes two array lists of Strings arL1 & arL2 as input
• Returns a new array list contains all the values of arL1 that cannot be found in arL2.

Notes

• you must not use any of these built-in methods: contains, lastIndexOf , indexOf.
• Your code should be efficient (i.e. exist loop if it meets a condition) and should use the appropriate loop pattern