Display tree from nodes

Jav tree print.java

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

public class ModelTreeNode {
	final String name;
	final List<ModelTreeNode> children;
	private int offset = 0;

	public ModelTreeNode(String name) {
		this.name = name;
		this.children = new ArrayList<>();
	}

	public ModelTreeNode(String name, List<ModelTreeNode> children) {
		this.name = name;
		this.children = children;
	}

	public ModelTreeNode(String name, int offset) {
		this.name = name;
		this.offset = offset;
		this.children = new ArrayList<>();
	}

//	public String showTree() {
//		StringBuilder treeStr = new StringBuilder();
//		return showTree(treeStr, true).toString();
//	}
//
//	public String stringTile() {
//		String s = "────";
//		int n = this.offset;
//		StringBuilder sb = new StringBuilder();
//		for (int i = 0; i < n; i++) {
//			sb.append(s);
//		}
//		return sb.toString();
//	}
//
//	private StringBuilder showTree(StringBuilder prefix, boolean isTail) {
////		System.out.println(prefix + (isTail ? "└── " : "├── ") + name);
//		StringBuilder thisprefix = prefix.append((isTail ? "└" : "├") + stringTile() + "── " + name + "\n");
//		for (int i = 0; i < children.size() - 1; i++) {
//			children.get(i).showTree(thisprefix.append((isTail ? " " : "│") + "   "), false);
//		}
//		if (children.size() > 0) {
//			children.get(children.size() - 1).showTree(thisprefix.append((isTail ? " " : "│") + "   "), true);
//		}
//		return thisprefix;
//	}

	public String showTree() {
		StringBuilder treeStr = new StringBuilder();
		print("", true, treeStr);
		return treeStr.toString();
	}

	private void print(String prefix, boolean isTail, StringBuilder treeStr) {
		treeStr.append(prefix + (isTail ? TreeLink.tailStr : TreeLink.forkStr) + name + "\n");
		for (int i = 0; i < children.size() - 1; i++) {
			children.get(i).print(prefix + (isTail ? TreeLink.indent : TreeLink.padStr), false, treeStr);
		}
		if (children.size() > 0) {
			children.get(children.size() - 1)
					.print(prefix + (isTail ? TreeLink.indent : TreeLink.padStr), true, treeStr);
		}
	}


	public static void main(String[] args) {
		ModelTreeNode ta = new ModelTreeNode("a");
		ModelTreeNode tb = new ModelTreeNode("b");
		ModelTreeNode tc = new ModelTreeNode("c", Arrays.asList(ta, tb));
		ModelTreeNode tasdf = new ModelTreeNode("asdf");
		ModelTreeNode te = new ModelTreeNode("e", Arrays.asList(tasdf));
		ModelTreeNode td = new ModelTreeNode("d");
		ModelTreeNode tf = new ModelTreeNode("f");
		ModelTreeNode tz = new ModelTreeNode("kod", Arrays.asList(tc, td, te, tf));
		System.out.println(tz.showTree());
	}
}

class TreeLink {
	static String tailStr = "└── ";
	static String forkStr = "├── ";
	static String padStr = "│   ";
	static String indent = "    ";
}