sorting matakuliah: t0974 / algoritma dan metode object oriented programming i tahun: 2008 versi:...

SORTING

Matakuliah : T0974 / Algoritma dan Metode Object Oriented Programming I Tahun : 2008Versi : 1/0

Bina Nusantara

Learning Outcomes

At the end of this session, student can:

• Explain sorting definition• Simulate algorithm of sorting• Using sorting in making program

Bina Nusantara

Outline

• Sorting Definition• Bubble Sort• Selection Sort• Insertion Sort

Bina Nusantara

Sorting Definition

• Sorting of number, alphabet, word or other value with certain rule

• Illustrate problem solving• Technique of using selection,

looping, method and array• Demonstrate perform/algorithm

complexity• Accelerate searching process

Bina Nusantara

Sorting Algorithm

• Basic sorting algorithm:– Bubble Sort– Insertion Sort– Selection Sort

• Advanced sorting algorithm:– Merge Sort– Quick Sort– Bucket Sort– Shell Sort– Radix Sort– External Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

• Also call as exchange sort• Ascending sorting from small to big

Descending sorting from big to small• Value into array• Adjacent value compared• If increasing, then change to become

decreasing• At round:

– 1, array at 1 (index 0) is a smallest value– 2, array at 2 (index 1) is a second smallest value– n-1, array at n (index n-1) is a biggest value

• Number of round = n-1

Bina Nusantara

Bubble Sort

Bubble sort ascending

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

• Sorting ascending

• Sorting descending

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Bubble Sort

Bina Nusantara

Selection Sort

Bina Nusantara

Selection Sort

• Value sent into array• Search for the biggest value put at

the end of array• At round:

– 1, array at 1 (index 0) is a small value– 2, array at 2 (index 1) is a second small value– n-1, array at n (index n-1) is a biggest value

• Number of round = n-1

Bina Nusantara

Selection Sort

• Selection sort ascending

• Selection sort descending

Bina Nusantara

Selection Sort

Bina Nusantara

Selection Sort

Bina Nusantara

Selection Sort

Bina Nusantara

Selection Sort

Bina Nusantara

Insertion Sort

Bina Nusantara

Insertion Sort

• Value sent into array• Using helper container• Value compared with index

previously• Every round did not produce the

biggest value or the smallest value.• Number of round = n-1

Bina Nusantara

Insertion Sort

• Insertion sort ascending

• Insertion sort descending

Bina Nusantara

Insertion Sort

Bina Nusantara

Did You Know?

• If number already sort, Bubble sort keep do the checking

• Causes long time execution• Solusi Bubble Flag

exercise

• Buatlah program BubbleSort Lengkap dengan menggunakan Flag

Bina Nusantara

answer

public class BubbleSortFlag {public static void swap(int[] data,int i, int j) {int temp=data[i];data[i]=data[j];data[j]=temp; }public static void BubbleFlag(int[] data) {boolean needNextPass=true;for (int i=1;i<data.length && needNextPass;i++){for (int j= data.length-1;j>=1;j--) {if (data[j-1]>data[j]) {swap(data,j-1,j);needNextPass=true;}}}}

Bina Nusantara

public static void main(String[] args){int []data= {6,4,3,2,1,10,11,15};System.out.print ("Nilai sebelum diurutkan :");for (int a:data)System.out.print(a+ " ");

BubbleFlag(data);System.out.println();System.out.print("Nilai sesudah diurutkan: ");for (int a: data)System.out.print (a+ " " );System.out.println ();}}

Bina Nusantara

Reference

• Introdution to Java Programming. 7ed. Liang. 2009. p227-230, p864-866

• Bubble Sort Algorithm in Java. http://www.geekpedia.com/tutorial272_Bubble-Sort-Algorithm-in-Java.html