One typical use of Objects class:

public void foo(SomeClass bar) {
    Objects.requireNonNull(bar, "custom msg"); // // Ensure an object is not null.
}

Output when bar is null:

Exception in thread "main" java.lang.NullPointerException: custom msg
    at java.util.Objects.requireNonNull(Unknown Source)
    at com.example.ObjectsUsage.main(ObjectsUsage.java:24)

Another one to construct hashCode from the fields:

@Override public int hashCode() {
return Objects.hash(this.foo, this.bar, this.duh);
}

And the most useful one:

if (Objects.equals(sun, moon)) {
    log("I swear I am in earth");
}