In the following:
var l = 1L;
var f = 1.0f;
System.println(f==l); // false in 7.2.1, true in 7.2.0 and earlier
System.println(l==f); // false in 7.2.1, true in 7.2.0 and earlier
System.println(1.0f==1L); // false in 7.2.1 with optimization...