Java does have some pre-defined overloaded operators such as + which can mean either arithmetic operation or String concatenation depending upon the context, but you can't define your own overloaded operators as you can in C++.
The reason that the architects of Java decided to disallow operator overloading by Java developers is that it can be confusing when you see operators and not know whether they are the ones that are part of the language or whether they are the ones that a developer has overloaded.
In Java, there are not developer-defined overloaded operators, but it is possible for a Java developer to overload methods. Overloaded methods have the same name, but have different type and/or order of parameters.
It can still be confusing when you see a method. You have to ask yourself if there are two methods of the same name whether they are overloaded or overriden and whether they follow the rules to be legal.