Multiple inheritance design issue in Java

Question

How do you deal with having only single inheritance in java? Here is my specific problem:

I have three (simplified) classes:

public abstract class A         


        

Answer 1

/** * First example */

class FieldsOfClassA {
    public int field1;
    public char field2;
}

interface IClassA {
    public FieldsOfClassA getFieldsA();
}

class CClassA implements IClassA {
    private FieldsOfClassA fields;

    @Override
    public FieldsOfClassA getFieldsA() {
        return fields;
    }
}

/**
 * seems ok for now
 * but let's inherit this sht
 */


class FieldsOfClassB {

    public int field3;
    public char field4;
}

interface IClassB extends IClassA {

    public FieldsOfClassA getFieldsA();
    public FieldsOfClassB getFieldsB();
}

class CClassB implements IClassB {

    private FieldsOfClassA fieldsA;
    private FieldsOfClassB fieldsB;

    @Override
    public FieldsOfClassA getFieldsA() {
        return fieldsA;
    }

    @Override
    public FieldsOfClassB getFieldsB() {
        return fieldsB;
    }
}

/**

• wow this monster got bigger

• imagine that you will need 4 lvl of inheritance

• it would take so much time to write this hell

• I'm even not talking that user of those iface will think

• what fields i will need fieldsA fieldsB fieldsC or another one

So composition does not work here and your pathetic tries are useless

When u think about Oject Oriented programming

u need BIG models with 6-7 lvls of multiple inheritance

because that is good test and because corresponds to models of real life or math models tested by civilization for 4 thousands years.

If your models require 2 lvl of inheritance stop pretending u using OO

U can easily implement it with any language even procedural one like C or Basic language */