Java does not support multiple inheritance because it can lead to ambiguity. For example, if a class extends two classes that have the same method signature, it is not clear which method the subclass should inherit. This can lead to unexpected behavior and make code difficult to understand and maintain.   Additionally, multiple inheritance can lead to the Diamond Problem, in which a subclass inherits conflicting methods from its superclasses. To avoid these issues, Java only supports single inheritance, meaning a class can extend only one other class. While this may seem limiting, it helps to keep code more robust and predictable. As a result, Java developers can be confident that their code will behave as expected.