Question

import java.util.ArrayList;
import java.util.List;
public abstract class AbstractBoxPacking {
    protected List input;

    protected int boxSize;

    public AbstractBoxPacking(List input, int boxSize){
        this.input = input;

        this.boxSize = boxSize;
    }

    public abstract int getOutput();

    public List deepCopy(List boxes){
        ArrayList copy = new ArrayList();
        for(int i = 0; i < boxes.size(); i++){

            copy.add(boxes.get(i).deepCopy());
        }

        return copy;
    }
}

I need Help fixing the errors in my java code

Answer 1

import java.util.ArrayList;
import java.util.List;

public abstract class AbstractBoxPacking {
    protected List input;

    protected int boxSize;

    public AbstractBoxPacking(List input, int boxSize) {
        this.input = input;

        this.boxSize = boxSize;
    }

    public abstract int getOutput();

    public List deepCopy(List boxes) {
        ArrayList copy = new ArrayList();
        for (int i = 0; i < boxes.size(); i++) {
            // this fixes your error. 
            // But to implement deepcopy properly we need Box class that you have as well.
            copy.add(boxes.get(i)); 
        }
        return copy;
    }
}