public static void main(String args[]){
        BTree bTree = new BTree();
        bTree.insert(5);
        bTree.insert(4);
        bTree.insert(3);
        bTree.insert(2);
        bTree.insert(1);
        bTree.insert(6);
        bTree.insert(11);
        bTree.insert(13);
        bTree.insert(8);
        bTree.insert(7);
        bTree.insert(10);
        bTree.insert(9);
        bTree.insert(28);
        bTree.insert(22);
        bTree.insert(12);
        bTree.insert(18);
        bTree.insert(16);
        bTree.traverse();
        System.out.print(bTree.search(28));
        System.out.print(bTree.search(11));
        System.out.print(bTree.search(5));
        System.out.print(bTree.search(21));
        System.out.print(bTree.search(3));
        System.out.print(bTree.search(4));
        System.out.print(bTree.search(14));
    }
http://www.geeksforgeeks.org/b-tree-set-1-insert-2/
http://www.geeksforgeeks.org/b-tree-set-1-introduction-2/
src/com/interview/tree/BTree.java