Introduction to LangChain: Make AI Smarter and Easier to use

Usage

Objects.equal(Object, Object)
Invoking this method then it will avoid the risking of NullPointerException when we need to compare two object whether they equal.

Objects.equal("a", "a"); // return true;
Objects.equal(null, "a"); // return false;
Objects.equal(null, null); // return true;

Objects.hashCode(Object, ....)
Generating hash code with multiple object will be simple. And it also can hash all fields of an Object to get more sensible code value.

// generate hash code with multi object
Objects.hashCode(this.intField, this.charField, this.stringField, this.dateField); 

ComparisonChain
ComparisonChain is a fluent idiom and much more readable. less prone to accidental typos, and smart enough not to do more work than it must.
It only performs comparisons until it finds a non-zero result, after which it ignores further input.

ObjectsTraining objectsTraining = new ObjectsTraining();
int result = ComparisonChain.start()
			   .compare(this.intField, objectsTraining.intField)
             .compare(this.stringField, objectsTraining.stringField)
             .compare(this.charField, objectsTraining.charField)
             .compare(this.dateField, objectsTraining.dateField)
             .result();