Constructor of the superclass  be invoked by from its subclass.A default member of a super class in one package be accessed in its own subclass which is in a different package.A protected member of a super class in one package be accessed by its own subclass which is in a different package.

1. The constructor of the superclass can be invoked from its subclass using the 'super' keyword. This is usually done in the constructor of the subclass. Here is an example:

public class SuperClass {
    public SuperClass() {
        System.out.println("Superclass Constructor");
    }
}

public class SubClass extends SuperClass {
    public SubClass() {
        super(); // This calls the constructor of the superclass
        System.out.println("Subclass Constructor");
    }
}

2. A default member of a superclass in one package cannot be accessed directly in its subclass which is in a different package. Default access modifier in Java means it can be accessed only from the same package, it is not visible from subclasses in a different package.

3. A protected member of a superclass in one package can be accessed by its subclass which is in a different package. The protected access modifier allows the subclass to access members of the superclass, even if the subclass is in a different package. Here is an example:

// In package1
public class SuperClass {
    protected int protectedField;
}

// In package2
public class SubClass extends SuperClass {
    public void method() {
        protectedField = 5; // This is allowed
    }
}

In this example, even though SubClass is in a different package than SuperClass, it can still access the protected member 'protectedField'.

1. The constructor of the superclass can be invoked from its subclass using the 'super' keyword. This is usually done in the constructor of the subclass. For example:

public class Subclass extends Superclass {
    public Subclass() {
        super(); // This invokes the constructor of the superclass
    }
}

2. A default member of a superclass in one package cannot be accessed in its own subclass which is in a different package. Default access modifier in Java means it can be accessed only from the same package. If you want to access it in a subclass from a different package, you should declare it as protected or public.

3. A protected member of a superclass in one package can be accessed by its own subclass which is in a different package. The protected access modifier allows access to the member within its own package and also in its subclasses, even if they are in a different package. For example:

// In package1
public class Superclass {
    protected int protectedMember;
}

// In package2
public class Subclass extends Superclass {
    public void method() {
        System.out.println(protectedMember); // This is allowed
    }
}

1. The constructor of the superclass can be invoked from its subclass using the 'super' keyword. This is usually done in the subclass's constructor. For example:

public class Subclass extends Superclass {
    public Subclass() {
        super(); // This invokes the constructor of the superclass
    }
}

2. A default member of a superclass in one package cannot be accessed directly in its subclass which is in a different package. Default access modifier in Java allows the access of a member in the same package only. If you want to access it in a subclass in a different package, you would need to provide public or protected access to that member.

3. A protected member of a superclass in one package can be accessed by its own subclass which is in a different package. The protected access modifier allows access within the same package and also in a subclass in a different package. For example:

// In package1
public class Superclass {
    protected int protectedMember;
}

// In package2
public class Subclass extends Superclass {
    public void method() {
        System.out.println(protectedMember); // This is allowed
    }
}