Treap - package DataStructures; / / / / / / / / / / / / /...

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package DataStructures; // Treap class // // CONSTRUCTION: with no initializer // // ******************PUBLIC OPERATIONS********************* // void insert( x ) --> Insert x // void remove( x ) --> Remove x // Comparable find( x ) --> Return item that matches x // Comparable findMin( ) --> Return smallest item // Comparable findMax( ) --> Return largest item // boolean isEmpty( ) --> Return true if empty; else false // void makeEmpty( ) --> Remove all items // void printTree( ) --> Print tree in sorted order /** * Implements a treap. * Note that all "matching" is based on the compareTo method. * @author Mark Allen Weiss */ public class Treap { /** * Construct the treap. */ public Treap( ) { root = nullNode; } /** * Insert into the tree. Does nothing if x is already present. * @param x the item to insert. */ public void insert( Comparable x ) { root = insert( x, root ); } /** * Remove from the tree. Does nothing if x is not found. * @param x the item to remove. */ public void remove( Comparable x ) { root = remove( x, root ); } /** * Find the smallest item in the tree. * @return the smallest item, or null if empty. */ public Comparable findMin( ) { if( isEmpty( ) ) return null; TreapNode ptr = root;
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while( ptr.left != nullNode ) ptr = ptr.left; return ptr.element; } /** * Find the largest item in the tree. * @return the largest item, or null if empty.
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This note was uploaded on 04/22/2011 for the course CSC 532 taught by Professor Dr.gursaranadhar during the Spring '07 term at University of North Carolina Wilmington.

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Treap - package DataStructures; / / / / / / / / / / / / /...

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