public class TreeTable { Tree hashTable[]; final int TABLESIZE=20; TreeTable({ hashTable = new Tree[TABLESIZE]; public int hash(int year) { return year%20; } private int getYear(int id) { String strld = String.valueOf(id); String year1 = strld.substring(0, 4); return Integer.parselnt(year1); } public void insert(Student student) { int yearOfAdmission = getYear(student.getld()); int index = hash(yearOfAdmission); index = Math.abs(index); if(hashTableſindex] == null) { hashTable[index] = new Tree(); hashTableſindex].insert(student); %3D else { hashTable[index].insert(student); } public Student find(int id) { int yearOfAdmission = getYear(id); int index = hash(yearOfAdmission); index = Math.abs(index); if(hashTable[index] == null) { return null; } else { return hashTable[index].find(id); %3D public boolean remove(int id) { Student student = find(id); if(student return false; } int yearOfAdmission = getYear(id); int index = hash(yearOfAdmission); index = Math.abs(index); if(hashTable[index] != null) { hashTable[index].remove(id); null) {

public class TreeTable { Tree hashTable[]; final int TABLESIZE=20; TreeTable({ hashTable = new Tree[TABLESIZE]; public int hash(int year) { return year%20; } private int getYear(int id) { String strld = String.valueOf(id); String year1 = strld.substring(0, 4); return Integer.parselnt(year1); } public void insert(Student student) { int yearOfAdmission = getYear(student.getld()); int index = hash(yearOfAdmission); index = Math.abs(index); if(hashTableſindex] == null) { hashTable[index] = new Tree(); hashTableſindex].insert(student); %3D else { hashTable[index].insert(student); } public Student find(int id) { int yearOfAdmission = getYear(id); int index = hash(yearOfAdmission); index = Math.abs(index); if(hashTable[index] == null) { return null; } else { return hashTable[index].find(id); %3D public boolean remove(int id) { Student student = find(id); if(student return false; } int yearOfAdmission = getYear(id); int index = hash(yearOfAdmission); index = Math.abs(index); if(hashTable[index] != null) { hashTable[index].remove(id); null) {

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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