// DrJava saved history v2
Tree t10 = new Tree(10);//End of Interaction//
Tree t30 = new Tree(30);//End of Interaction//
Tree t20 = new Tree(20, t10, t30); //End of Interaction//
Tree t60 = new Tree(60);//End of Interaction//
Tree t70 = new Tree(70, t60, null);//End of Interaction//
Tree t50 = new Tree(50, null, t70);//End of Interaction//
Tree tree = new Tree(40, t20, t50);//End of Interaction//
tree.printTree();//End of Interaction//