Anki Deck Changes

class T {
    int data = 50;
    public void s2() { System.out.println("T " + data); }
}

class S extends T {
    int data = 100;
    public void s2() { System.out.println(this.data); }
}

class R extends S {
    int data = 200;
}

T r = new R();
r.s2(); // Prints "100"

• Cat c = new Cat(); Dog d = (Dog) c; Casting Static type Cat to Dog as they’re siblings.
• Cat c = (Dog) d; Assigning static type of sibling or super-type to sub-type

• static
• final
• private are not inherited either
• constructors

interface B {
    Object getValue();
    void process() throws IOException;
}

interface A extends B {
    // 1. Covariant return type - more specific than Object
    String getValue();  // Valid override

    // 2. Can reduce or eliminate exceptions
    void process();  // Valid - removes IOException

    // 3. Can add default implementation
    default String getValue() {
        return "default";
    }
}