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Jakub-RadzikJakub-Radzik
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Lab9
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‎Lab9/JakubRadzikLab9.zip

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‎Lab9/Lab9.iml

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<?xml version="1.0" encoding="UTF-8"?>
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<module type="JAVA_MODULE" version="4">
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<component name="NewModuleRootManager" inherit-compiler-output="true">
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<exclude-output />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>

‎Lab9/Wyniki.odt

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‎Lab9/Wyniki.pdf

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‎Lab9/out/production/Lab9/ArrayWithDoubleHash.class

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‎Lab9/out/production/Lab9/ArrayWithHashing.class

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‎Lab9/out/production/Lab9/ArrayWithLineHash.class

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‎Lab9/out/production/Lab9/ArrayWithQuadraticHash.class

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‎Lab9/out/production/Lab9/Node.class

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‎Lab9/out/production/Lab9/Tab.class

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‎Lab9/out/production/Lab9/Tests.class

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‎Lab9/out/production/Lab9/main1.class

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‎Lab9/out/production/Lab9/testing.class

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‎Lab9/src/ArrayWithDoubleHash.java

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public class ArrayWithDoubleHash extends ArrayWithHashing{
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private int temporaryKey = 0;
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public ArrayWithDoubleHash(int SIZE) {
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super(SIZE);
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}
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public ArrayWithDoubleHash() {
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}
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public int hash(int i) {
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temporaryKey = i;
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return super.hash(i);
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}
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@Override
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public int hash2(int i){
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return (i%49)+(i/5)+i*5;
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}
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public int getOffset(int i, int hash) {
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return (((hash+(i*hash2(temporaryKey)))%tab.length)+tab.length)%tab.length;
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}
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}

‎Lab9/src/ArrayWithHashing.java

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public abstract class ArrayWithHashing implements Tab{
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private int tries = 0;
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public int getTries() {
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return tries;
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}
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public void setTries(int tries) {
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this.tries = tries;
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}
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protected static final int SIZE = 30;
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Node[] tab;
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public ArrayWithHashing(int SIZE) {
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this.tab = new Node[SIZE];
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}
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public ArrayWithHashing() {
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tab = new Node[SIZE];
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} //WITH SIZE = 30
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public int hash(int key) {
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return ((key%8)+key/3)%tab.length;
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}
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public int hash2(int key) {
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return (key*5)+2 % tab.length;
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}
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public int put(int k, int v) throws Exception{
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int hash = hash(k);
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int i = 0;
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if (tab[hash] == null) {
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tab[hash] = new Node(k,v);
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} else {
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while (tab[getOffset(i, hash)] != null) {
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if (tab[getOffset(i, hash)].getKey() == k) {
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int temp = tab[getOffset(i, hash)].getValue();
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tab[getOffset(i, hash)].setValue(v);
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setTries(i);
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return temp;
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}
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if (size() == tab.length)
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throw new Exception("Array full");
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i++;
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}
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tab[getOffset(i, hash)] = new Node(k,v);
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}
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setTries(i);
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return -1;
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}
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public int get(int k) throws Exception{
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int hash = hash(k);
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int i = 0;
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if(tab[hash]!=null && tab[hash].getKey()==k){
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setTries(i);
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return tab[hash].getValue();
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}
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while (tab[getOffset(i, hash)] != null && tab[getOffset(i, hash)].getKey() != k) {
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if(i>tab.length){
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setTries(i);
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return -1;
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}
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i++;
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}
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setTries(i);
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if(tab[getOffset(i, hash)]!=null){
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return tab[getOffset(i, hash)].getValue();
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}else{
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return -1;
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}
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}
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public int size() {
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int c = 0;
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for (int i = 0; i < tab.length; i++) {
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if(tab[i]!=null){
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c++;
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}
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}
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return c;
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}
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public boolean isEmpty() {
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for(int i = 0; i < tab.length; i++) {
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if(tab[i]!=null){
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return false;
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}
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}
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return true;
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}
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public void resize(int newSize) {
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Node[] newTab = new Node[newSize];
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for (int i = 0; i < tab.length && i<newTab.length; i++) {
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newTab[i] = tab[i];
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}
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tab = newTab;
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}
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public void dump() {
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System.out.print('[');
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for (int i = 0; i < tab.length; i++) {
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if(tab[i]==null){
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System.out.print("[X,X] , ");
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}else{
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System.out.print("["+tab[i].getKey()+":"+tab[i].getValue()+"], ");
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}
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}
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System.out.println("]");
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}
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public int getOffset(int i, int hash){
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return 0;
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}
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@Override
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public boolean containsKey(int key) {
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int hash = hash(key);
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for (int i = hash; i < tab.length; i++) {
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if(tab[i]!=null && tab[i].getKey()==key){
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return true;
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}
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}
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return false;
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}
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}

‎Lab9/src/ArrayWithLineHash.java

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public class ArrayWithLineHash extends ArrayWithHashing{
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public ArrayWithLineHash(int SIZE) {
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super(SIZE);
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}
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public ArrayWithLineHash() {
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}
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@Override
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public int getOffset(int i, int hash) {
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return (hash+i)%(tab.length);
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}
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}

‎Lab9/src/ArrayWithQuadraticHash.java

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public class ArrayWithQuadraticHash extends ArrayWithHashing{
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public ArrayWithQuadraticHash(int SIZE) {
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super(SIZE);
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}
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public ArrayWithQuadraticHash() {
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}
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public int getOffset(int i, int hash){
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return (((hash + ((-1^(i-1))*(((i+1)/2))^2))%tab.length)+tab.length )%tab.length;
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}
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}

‎Lab9/src/Node.java

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public class Node {
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private Integer key;
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private Integer value;
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public Node(int key, int value) {
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this.key = key;
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this.value = value;
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}
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public Node() {
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}
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public int getKey() {
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return key;
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}
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public void setKey(int key) {
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this.key = key;
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}
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public int getValue() {
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return value;
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}
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public void setValue(int value) {
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this.value = value;
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}
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}

‎Lab9/src/Tab.java

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public interface Tab {
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int get(int key) throws Exception;
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int put(int k, int v) throws Exception;
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boolean containsKey(int key);
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}

‎Lab9/src/Tests.java

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import java.util.Random;
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public class Tests {
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private static final int SIZE = 2000;
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private double[] alfa = {0.7,0.8,0.9};
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int[] data;
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int[] search;
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public Tests() {
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data = new int[SIZE];
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search = new int[100];
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Random r = new Random(SIZE);
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for (int i = 0; i < search.length; i++) {
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search[i] = r.nextInt(SIZE);
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}
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for (int i = 0; i < data.length; i++) {
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data[i] = r.nextInt(SIZE);
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}
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TestStart();
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}
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public void TestStart(){
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ArrayWithLineHash line = new ArrayWithLineHash(SIZE);
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ArrayWithQuadraticHash quad = new ArrayWithQuadraticHash(SIZE);
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ArrayWithDoubleHash dual = new ArrayWithDoubleHash(SIZE);
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for (int i = 0; i < alfa.length; i++) {
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System.out.println("TEST DLA ZAPELNIENIA alfa = "+alfa[i]);
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System.out.println("Linear Hashing: "+ result(line, alfa[i]));
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System.out.println("Quadratic Hashing: "+ result(quad, alfa[i]));
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System.out.println("Double Hashing: "+ result(dual, alfa[i]));
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System.out.println("===========================================");
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}
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}
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//COUNT SECTION=======================================================
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private int tries;
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private int success_tries;
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private int fail_tries;
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public String result(ArrayWithHashing ah, double alfa){
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try{
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tries = 0;
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success_tries = 0;
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fail_tries = 0;
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for (int i = 0; i < (int)(data.length*alfa); i++) {
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ah.put(data[i], data[i]*10);
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}
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for (int i = 0; i < search.length; i++) {
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int find = ah.get(search[i]);
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tries+= ah.getTries();
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if(find==-1){
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fail_tries += ah.getTries();
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} else{
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success_tries += ah.getTries();
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}
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ah.setTries(0);
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}
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}catch (Exception e){
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e.printStackTrace();
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}
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return "ALL: "+(tries/(double)search.length)+" S:"+(success_tries/(double)search.length)+" F:"+(fail_tries/(double)search.length);
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}
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}

‎Lab9/src/main1.java

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public class main1 {
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public static void main(String[] args) throws Exception {
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ArrayWithLineHash linear = new ArrayWithLineHash(30);
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ArrayWithQuadraticHash quad = new ArrayWithQuadraticHash(30);
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ArrayWithDoubleHash dual = new ArrayWithDoubleHash(30);
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System.out.println("WRZUCANIE ELEMENTÓW WRAZ Z PODGLĄDEM TABLICY dumb()");
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for (int i = 0; i < 20; i++) {
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linear.put(i,i*10);
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quad.put(i,i*10);
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dual.put(i,i*10);
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System.out.println("i: " + i +" linear_hash(i): "+linear.hash(i));
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System.out.println("LINEAR: ");
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linear.dump();
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System.out.println("QUAD: ");
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quad.dump();
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System.out.println("DUAL: ");
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dual.dump();
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System.out.println("==============================================================================================");
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}
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System.out.println("WYNIKI DLA OPERACJI GET:");
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for (int i = 0; i < 20; i++) {
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System.out.println(linear.get(i)+" "+quad.get(i)+" "+dual.get(i));
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}
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System.out.println(linear.get(22)+" "+quad.get(22)+" "+dual.get(22));
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System.out.println("DALSZE OPERACJE:");
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System.out.println("ROZMIAR:");
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System.out.println(linear.size()+" "+quad.size()+" "+dual.size());
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System.out.println("IS EMPTY:");
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System.out.println(linear.isEmpty()+" "+quad.isEmpty()+" "+dual.isEmpty());
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System.out.println("CONTAINS 99:");
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System.out.println(linear.containsKey(99)+" "+quad.containsKey(99)+" "+dual.containsKey(99));
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System.out.println("RESIZE() na rozmiar 5");
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linear.resize(5);
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quad.resize(5);
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dual.resize(5);
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linear.dump();
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quad.dump();
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dual.dump();
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System.out.println("\n\nTESTY PORÓWNAN: ");
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new Tests();
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}
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}

‎Lab9/wyniki.ods

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‎Lab9/wyniki.xlsx

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