1. add dependency

<dependency>
    <groupId>io.github.light0x00</groupId>
    <artifactId>binary-tree-printer</artifactId>
    <version>0.0.2</version>
</dependency>

2. implement IPrintableBinaryTreeNode

@AllArgsConstructor
class BinaryTreeNode implements IPrintableBinaryTreeNode {
    //...   
}

3. construct your tree structure then print it

BinaryTreeNode tree=buildTree();
BinaryTreePrinter.print(tree);

it will output the tree as ascii format:

      1       
     /  \     
    /    \    
   /      \   
  /        \  
  2       33  
 /  \    /  \ 
/    \  /    \
4    4  6    7