What is the purpose of the super keyword?

Like many other keywords, super has several different uses depending on the context:

1. Define a lower bound for a generic type: Consumer<? super Number>
2. Access a member of the parent class that is shadowed by members of the subclass or local variables: int foo = super.foo
3. Call the parent constructor within a subclass constructor: SubClass() { super("subclass param"); }
4. In case of ambiguity, specify the parent type explicitly (as shown in the image)