Binary tree construction and input, pre-order sequencing

1  PackageOrg.lyk.main;2 3 ImportJava.util.Scanner;4 5 6 classTest<t>7 {8      Public Static<T>voidprint (T d)9     {Ten System.out.println (d); One     } A } -  - classNode<textendscomparable<t> > the { -Node<t>Left ; - T data; -Node<t>Right ; +  -     voidAdd (T data) +     { A         if(Data.compareto ( This. Data) < 0) at         { -             if(NULL!= This. Left) -                  This. Left.add (data); -             Else -             { -                  This. left =NewNode<t>(); in                  This. Left.data =data; -             } to}Else +         { -             if(NULL!= This. Right) the                  This. Right.add (data); *             Else $             {Panax Notoginseng                  This. right =NewNode<t>(); -                  This. Right.data =data; the             } +         } A     } the      Public Static<textendsComparable<t>> node<t> Add_first (node<t>Node,scanner Scanner) +     { -String data =input (scanner); $         if("*". Equals (data)) $         { -node =NULL; -         } the         Else -         {Wuyinode =NewNode<t>(); theNode.data =(T) data; -Node.left =Node.add_first (node.left,scanner); WuNode.right =Node.add_first (node.right,scanner); -         }  About         returnnode; $     } -      -     Private StaticString input (Scanner Scanner) -     { AScanner.usedelimiter ("\ r \ n"); +System.out.print ("Please Enter:");  theString data =(String) Scanner.next (); -         returndata; $     } the      the     voidGet_first () the     { theSystem.out.print ( This. data); -         if(NULL!= This. Left) in         { the              This. Left.get_first (); the         } About         if(NULL!= This. Right) the         { the              This. Right.get_first (); the         } +     } -       the      Public voidGet_middle ()Bayi     { the         if(NULL!= This. Left) the              This. Left.get_middle (); -System.out.print ( This. data); -         if(NULL!= This. Right) the              This. Right.get_middle (); the     }  the      the      Public voidget_last () -     { the         if(NULL!= This. Left) the              This. Left.get_last (); the         if(NULL!= This. Right)94              This. Right.get_last (); theSystem.out.print ( This. data); the     } the }98  About classTree<textendsComparable<t>> - {101Node<t>Root;102 103      Public voidAdd_first (Scanner Scanner)104     {  the          This. root = Node.add_first ( This. Root,scanner);106     } 107     108      Public voidGet_first ()109     { the         if(NULL!=root)111         { the Root.get_first ();113         } the     }  the      Public voidGet_middle () the     {117         if(NULL!= This. Root)118              This. Root.get_middle ();119     } -      Public voidget_last ()121     {122         if(NULL!= This. Root)123              This. Root.get_last ();124     } the }126 127  Public classMain - {129      Public Static voidMain (string[] args) the     {131Scanner Scanner =NewScanner (system.in); theTree<string> BT =NewTree<>(); 133 Bt.add_first (scanner);134System.out.println ("First Order output:");135 Bt.get_first ();136System.out.println ("middle order output:");137 Bt.get_middle ();138System.out.println ("Post output:");139 bt.get_last (); $ scanner.close ();141SYSTEM.OUT.PRINTLN ("///~ main Done"); 142     } 143}

Binary tree construction and input, pre-order sequencing