The equals () method is a method of Integer class under java.lang package. This method compares the value of the parameter to the value of the current Integer object. It returns Boolean (True or False) which corresponds to the equality of this Integer and method argument object. It also overrides the equals () method of Object class.1. As long as your objects implement equals, you can use the Stream API to get a distinct set of values, and if that distinct count is 1, they are all the same. boolean allEqual = Stream.of (obj1, obj2, obj3).distinct ().count () == 1. Share. Improve this answer. Follow.
When you add autoboxing to the mix, things are slightly different. A primitive is always autoboxed to its wrapper type. Here, 0, which is an int literal, is autoboxed to a java.lang.Integer wrapper instance. Since java.lang.Long and java.lang.Integer are different classes, equals between them must return false.The reason lies in the default implementations of the equals () and hashCode () methods. By default, the equals () method checks for reference equality — whether the two objects are the same
This works for Java because classes are singletons and the VM guarantees this. If you're paranoid, you can use this.getClass().equals(obj.getClass()) but the two are really equivalent. This works most of the time. But sometimes, Java frameworks need to do "clever" things with the byte code. This usually means they create a subtype automatically.
By default, equals method only checks the hashcodes of any two objects. So, if you need that equals method should return result depending on any underlying property in your object, you will have to override equals method accordingly. H5Q3. 100 705 283 878 725 989 113 246