File list (Check if you may need any files):
Question_Tree
.............\.classpath
.............\.project
.............\.settings
.............\.........\org.eclipse.jdt.core.prefs
.............\bin
.............\...\bitree
.............\...\......\basic
.............\...\......\.....\BiNode.class
.............\...\......\.....\BiTree.class
.............\...\......\main
.............\...\......\....\BiTreeUtil.class
.............\...\......\test
.............\...\......\....\BiTreeTest.class
.............\...\......\....\tree.txt
.............\src
.............\...\bitree
.............\...\......\basic
.............\...\......\.....\BiNode.java
.............\...\......\.....\BiTree.java
.............\...\......\main
.............\...\......\....\BiTreeUtil.java
.............\...\......\test
.............\...\......\....\BiTreeTest.java
.............\...\......\....\tree.txt