Introduction to Programming

Class lang3.ArrayUtils

The class org.apache.commons.lang3.ArrayUtils is a compliment to the class java.util.Arrays. It adds new methods to the array managing toolkit and the ability to handle null in cases when otherwise NullPointerException could be thrown.

Similarly to theArrays class , the ArrayUtils class has many (around 300) overloaded methods that can be collected into 12 groups: 

• add(), addAll(), and insert(): Add elements to an array
• clone(): Clones an array, similar to the method copyOf() in  java.util.Arrays and the method arraycopy() of java.lang.System
• getLength(): Returns an array length and handles null (while the attempt to read the property length when an array is null throws NullPointerException)
• hashCode(): Calculates ...