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system72
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http://docs.google.com/a/actionxp.com/Doc?id=dd8jsrzr_1fxkg7b But k.top have bug in color by paste data. // tree.java // demonstrates binary tree // to run this program: C>java TreeApp import java.io.*; import java.util.*; // for Stack class //////////////////////////////////////////////////////////////// class Node { iData; // data item (key) public dData; // data item public Node leftChild; // this node's left child public Node rightChild; // this node's right child public displayNode() // display ourself { System.out.print('{'); System.out.print(iData); System.out.print(", "); System.out.print(dData); System.out.print("} "); } // end class Node //////////////////////////////////////////////////////////////// } class Tree { Node root; // first node of tree // ------------------------------------------------------------- public Tree() // constructor { root = null; } // no nodes in tree yet // ------------------------------------------------------------- public Node find(key) // find node with given key { // (assumes non-empty tree) Node current = root; // start at root whilecurrent.iData != key) // while no match, { key < current.iData) // go left? current = current.leftChild; else // or go right? current = current.rightChild; ifcurrent == null// if no child, ) return ; null// didn't find it } current; // found it } // end find() // ------------------------------------------------------------- public insert(id, double dd) Node newNode = new Node(); // make new node newNode.iData = id; // insert data newNode.dData = dd; ifroot==null// no node in root ) root = newNode; else // root occupied { Node current = root; // start at root Node parent; while// (exits internally) (true) { parent = current; ifid < current.iData) // go left? { current = current.leftChild; ifcurrent == null// if end of the line, ) { // insert on left parent.leftChild = newNode; return; } // end if go left } else // or go right? { current = current.rightChild; ifcurrent == null// if end of the line ) { // insert on right parent.rightChild = newNode; return; } // end else go right } } // end while } // end else not root } // end insert() // ------------------------------------------------------------- public delete(key) // delete node with given key { // (assumes non-empty list) Node current = root; Node parent = root; boolean isLeftChild = true; whilecurrent.iData != key) // search for node { parent = current; ifkey < current.iData) // go left? { isLeftChild = true; current = current.leftChild; } // or go right? else { isLeftChild = false; current = current.rightChild; } current == null// end of the line, ) return ; false// didn't find it } // end while // found node to delete // if no children, simply delete it ifcurrent.leftChild==null && current.rightChild==nullcurrent == root) // if root, root = null; // tree is empty else ifisLeftChild) parent.leftChild = null; // disconnect else // from parent parent.rightChild = null; } // if no right child, replace with left subtree else ifcurrent.rightChild==nullcurrent == root) root = current.leftChild; else ifisLeftChild) parent.leftChild = current.leftChild; else parent.rightChild = current.leftChild; // if no left child, replace with right subtree else ifcurrent.leftChild==nullcurrent == root) root = current.rightChild; else ifisLeftChild) parent.leftChild = current.rightChild; else parent.rightChild = current.rightChild; else // two children, so replace with inorder successor { // get successor of node to delete (current) Node successor = getSuccessor(current); // connect parent of current to successor instead ifcurrent == root) root = successor; else ifisLeftChild) parent.leftChild = successor; else parent.rightChild = successor; // connect successor to current's left child successor.leftChild = current.leftChild; } // end else two children // (successor cannot have a left child) return ; true// success } // end delete() // ------------------------------------------------------------- // returns node with next-highest value after delNode // goes to right child, then right child's left descendents private Node getSuccessor(Node delNode) Node successorParent = delNode; Node successor = delNode; Node current = delNode.rightChild; // go to right child whilecurrent != null// until no more ) { // left children, successorParent = successor; successor = current; current = current.leftChild; // go to left child } // if successor not ifsuccessor != delNode.rightChild) // right child, { // make connections successorParent.leftChild = successor.rightChild; successor.rightChild = delNode.rightChild; } successor; } // ------------------------------------------------------------- public traverse(traverseType) traverseType) { case 1: System.out.print("\nPreorder traversal: "); preOrder(root); break; case 2: System.out.print("\nInorder traversal: "); inOrder(root); break; case 3: System.out.print("\nPostorder traversal: "); postOrder(root); break; } System.out.println(); } // ------------------------------------------------------------- private preOrder(Node localRoot) localRoot != nullSystem.out.print(localRoot.iData " "); preOrder(localRoot.leftChild); preOrder(localRoot.rightChild); } // ------------------------------------------------------------- } private inOrder(Node localRoot) localRoot != nullinOrder(localRoot.leftChild); System.out.print(localRoot.iData " "); inOrder(localRoot.rightChild); } // ------------------------------------------------------------- } private postOrder(Node localRoot) localRoot != nullpostOrder(localRoot.leftChild); postOrder(localRoot.rightChild); System.out.print(localRoot.iData " "); } // ------------------------------------------------------------- } public displayTree() { Stack globalStack = new Stack(); globalStack.push(root); int nBlanks = 32; boolean isRowEmpty = false; System.out.println( "......................................................"); whileisRowEmpty==falseStack localStack = new Stack(); isRowEmpty = true; forj=0; j<nBlanks; j ) System.out.print(' '); whileglobalStack.isEmpty()==falseNode temp = (Node)globalStack.pop(); iftemp != nullSystem.out.print(temp.iData); localStack.push(temp.leftChild); localStack.push(temp.rightChild); iftemp.leftChild != null || temp.rightChild != nullisRowEmpty = false; } System.out.print("--"); localStack.push(; null)localStack.push(; null)} j=0; j<nBlanks*2-2; j ) System.out.print(' '); } // end while globalStack not empty System.out.println(); nBlanks /= 2; whilelocalStack.isEmpty()==falseglobalStack.push( localStack.pop() ); } // end while isRowEmpty is false System.out.println( "......................................................"); } // end displayTree() // ------------------------------------------------------------- } // end class Tree //////////////////////////////////////////////////////////////// class TreeApp { static public void main(args) IOException { value; Tree theTree = new Tree(); theTree.insert(50, 1.5); theTree.insert(25, 1.2); theTree.insert(75, 1.7); theTree.insert(12, 1.5); theTree.insert(37, 1.2); theTree.insert(43, 1.7); theTree.insert(30, 1.5); theTree.insert(33, 1.2); theTree.insert(87, 1.7); theTree.insert(93, 1.5); theTree.insert(97, 1.5); whileSystem.out.print("Enter first letter of show, "); System.out.print("insert, find, delete, or traverse: "); int choice = getChar(); switchchoice) { case 's': theTree.displayTree(); break; case 'i': System.out.print("Enter value to insert: "); value = getInt(); theTree.insert(value, value 0.9); break; case 'f': System.out.print("Enter value to find: "); value = getInt(); Node found = theTree.find(value); iffound != nullSystem.out.print("Found: "); found.displayNode(); System.out.print("\n"); } System.out.print("Could not find "); System.out.print(value '\n'); break; case 'd': System.out.print("Enter value to delete: "); value = getInt(); boolean didDelete = theTree.delete(value); ifdidDelete) System.out.print("Deleted " value '\n'); else System.out.print("Could not delete "); System.out.print(value '\n'); break; case 't': System.out.print("Enter type 1, 2 or 3: "); value = getInt(); theTree.traverse(value); break; default: System.out.print("Invalid entry\n"); } // end switch } // end while } // end main() // ------------------------------------------------------------- public static String getString() throws IOException { InputStreamReader isr = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(isr); String s = br.readLine(); return s; } // ------------------------------------------------------------- public static char getChar() throws IOException { s = getString(); return s.charAt(0); } //------------------------------------------------------------- public static int getInt() throws IOException { s = getString(); return Integer.parseInt(s); } // ------------------------------------------------------------- } // end class TreeApp //////////////////////////////////////////////////////////////// String String (else ) { (((true) { int throws String[] ) (for(int else { ) () { () { ((int ) { (void ) { { if(void ) { { if(void ) { { if(void { switch(int void return (({ ((() if((() if((() { if((if(((int boolean (((({ int void return (if((int private void double public int RainbowEditor v3.2 |
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