Question

I am having an Arraylist of Objects. Those object have an attribute or datatype – ‘String’.
I need to sort the Arraylist by that string. How to achieve this?

Answer 1

You need to write a Comparator<MyObject> and use Collections.sort(List<T>, Comparator<? super T> to sort your List.

Or else, your MyObject can also implements Comparable<MyObject>, defining a natural ordering that compares on your specific attribute, and then use Collections.sort(List<T> instead.

See also

• Java Tutorials/Object Ordering

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