Feb 22, 2016 · Because with Java you can compare objects without first creating a Gson object and then calling toJson. Creating the Gson object and calling the logic needed to convert the actually object to a flat String (toJson) is unnecessary overhead. You can compare objects without first converting the objects to Json strings (which is also quicker). –

I am new to Java and for the time created an array of objects in Java. I have a class A for example - A[] arr = new A[4]; But this is only creating pointers (references) to A and not 4 objects. Is this correct? I see that when I try to access functions/variables in the objects created I get a null pointer exception.

Mar 19, 2015 · All Java objects have a toString() method, which is invoked when you try to print the object. System.out.println(myObject); // invokes myObject.toString() This method is defined in the Object class (the superclass of all Java objects).

Sorting array objects Java. 1. Trying to sort a Java array of objects. 1. Java sorting an object array. 0.

Oct 20, 2010 · If you want to allow a user to add a bunch of new MyObjects to the list, you can do it with a for loop: Let's say I'm creating an ArrayList of Rectangle objects, and each Rectangle has two parameters- length and width.

We can sort the list in one of two ways: 1. Using Comparator: When required to use the sort logic in multiple places If you want to use the sorting logic in a single place, then you can write an anonymous inner class as follows, or else extract the comparator and use it in multiple places

Sep 17, 2013 · I aggree with @MK10 but i would use java.util.Objects for nullsafe comparison return list.stream().anyMatch(o -> Objects.euqals(o.getName(), name); If you want to check objects in stream for null, you can add a .filter(Objects::nonNull) before anyMatch.

Aug 20, 2019 · Merging two objects in Java. Ask Question Asked 13 years, 9 months ago. Modified 1 year, 6 months ago.

Jan 19, 2009 · I want to return two objects from a Java method and was wondering what could be a good way of doing so? The possible ways I can think of are: return a HashMap (since the two Objects are related) or return an ArrayList of Object objects. To be more precise, the two objects I want to return are (a) List of objects and (b) comma separated names of ...

import java.util.Arrays; import java.util.Comparator; import java.util.List; /** * This is a chained comparator that is used to sort a list by multiple * attributes by chaining a sequence of comparators of individual fields * together.