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+package com.kundan.binpacking.core;%0A%0Aimport java.util.ArrayList;%0A%0Apublic class Shelf %7B%0A%09public ArrayList%3CItem%3E mAssignedItems = new ArrayList%3CItem%3E();%0A%09public double mShelfHieght;%0A%09@Override%0A%09public String toString() %7B%0A%09%09// TODO Auto-generated method stub%0A%09%09return mShelfHieght+%22 %3E %22+mAssignedItems;%0A%09%7D%0A%7D%0A

Create Shelf.java