20192313 2020-2021-1 《資料結構與面向物件程式設計》實驗七報告
課程:《程式設計與資料結構》
班級: 1923
姓名: 陳宇帆
學號:20192313
實驗教師:王志強
實驗日期:2020年11月19日
必修/選修: 必修
1.實驗內容
1.定義一個Searching和Sorting類,並在類中實現linearSearch,SelectionSort方法,最後完成測試。
要求不少於10個測試用例,提交測試用例設計情況(正常,異常,邊界,正序,逆序),用例資料中要包含自己學號的後四位
- 提交執行結果圖
2.重構你的程式碼
把Sorting.java Searching.java放入 cn.edu.besti.cs1823.(姓名首字母+四位學號)包中(例如:cn.edu.besti.cs1823.G2301)
把測試程式碼放test包中。
- 重新編譯,執行程式碼
- 提交編譯,執行的截圖(IDEA,命令列兩種)
3.參考http://www.cnblogs.com/maybe2030/p/4715035.html ,學習各種查詢演算法並在Searching中補充查詢演算法並測試
- 提交執行結果截圖。
4.補充實現課上講過的排序方法:希爾排序,堆排序,二叉樹排序等(至少3個)
- 測試實現的演算法(正常,異常,邊界)
- 提交執行結果截圖
5.編寫Android程式對實現各種查詢與排序演算法進行測試。
- 提交執行結果截圖
- 推送程式碼到碼雲
實驗要求
- 提交五個實驗的執行結果截圖以及程式碼截圖。(後兩個選做)
- 理解實驗步驟和實驗過程,通過實驗中參考資料進行學習,並寫出心得感悟。
2. 實驗過程及結果
1.定義一個Searching和Sorting類,並在類中實現linearSearch,SelectionSort方法,最後完成測試。
要求不少於10個測試用例,提交測試用例設計情況(正常,異常,邊界,正序,逆序),用例資料中要包含自己學號的後四位
提交執行結果圖。
- Searching程式碼
package Search; public class Searching { public static Comparable linearSearch(Comparable[] data,Comparable target){ Comparable result = null; int index = 0; while(result == null && index < data.length){ if(data[index].compareTo(target)==0) result = data[index]; index++; } return result; } }
Sorting程式碼
package Search;
public class Sorting {
public static void selectionSort(Comparable[] data) {
int min;
for(int index=0;index<data.length-1;index++){
min=index;
for(int scan=index+1;scan<data.length;scan++)
if(data[scan].compareTo(data[min])<0)
min=scan;
swap(data,min,index);
}
}
private static void swap(Comparable[] data,int index1,int index2){
Comparable temp=data[index1];
data[index1]=data[index2];
data[index2]=temp;
}
}
Contact程式碼
package Search;
public class Contact implements Comparable
{
private String firstName, lastName, phone;
public Contact (String first, String last, String telephone)
{
firstName = first;
lastName = last;
phone = telephone;
}
public String toString ()
{
return lastName + ", " + firstName + ": " + phone;
}
public int compareTo (Object other)
{
int result;
result = phone.compareTo(((Contact)other).phone);
return result;
}
Test程式碼
package Search;
public class Test {
public static void main(String[] args) {
Contact[] a = new Contact[5];
Contact[] b = new Contact[5];
a[0] = new Contact("a", "b", "2303");
a[1] = new Contact("c", "d", "2019");
a[2] = new Contact("e", "f", "2000");
a[3] = new Contact("g", "h", "1999");
a[4] = new Contact("i", "j", "1923");
b[0] = new Contact("k", "l", "123");
b[1] = new Contact("m", "n", "234");
b[2] = new Contact("o", "p", "345");
b[3] = new Contact("q", "r", "456");
b[4] = new Contact("s", "t", "567");
Contact target1 = new Contact("", "", "123");//小邊界
Contact target2 = new Contact("", "", "2303");//大邊界
Contact target3 = new Contact("", "", "1923");//正常
Contact target4 = new Contact("", "", "234");//正常
Contact target5 = new Contact("", "", "345");//正常
Contact target6 = new Contact("", "", "0010");//異常
Contact target7 = new Contact("", "", "999");//異常
Contact found[] = new Contact[10];
found[0] = (Contact) Searching.linearSearch(b, target1);
found[1] = (Contact) Searching.linearSearch(a, target2);
found[2] = (Contact) Searching.linearSearch(a, target3);
found[3] = (Contact) Searching.linearSearch(b, target4);
found[4] = (Contact) Searching.linearSearch(b, target5);
found[5] = (Contact) Searching.linearSearch(b, target6);
found[6] = (Contact) Searching.linearSearch(a, target7);
found[7] = (Contact) Searching.linearSearch(b, target7);
found[8] = (Contact) Searching.linearSearch(a, target6);
found[9] = (Contact) Searching.linearSearch(a, target1);
for (int i = 1; i <= 10; i++) {
System.out.println("Test" + i + ":");
if (found[i - 1] == null)
System.out.println("Can't found it!");
else
System.out.println("Found: " + found[i - 1]);
}
Sorting.selectionSort(a);//倒序
Sorting.selectionSort(b);//正序
System.out.println("Test11:");
for (Comparable play : a)
System.out.println(play);
System.out.println("Test12:");
for (Comparable play : b)
System.out.println(play);
}
}
執行截圖
2.重構你的程式碼,把Sorting.java Searching.java放入 cn.edu.besti.cs1823.(姓名首字母+四位學號) 包中(例如:cn.edu.besti.cs1823.G2301)
把測試程式碼放test包中
重新編譯,執行程式碼,提交編譯,執行的截圖(IDEA,命令列兩種)
實驗程式碼
Search包程式碼A
package Search;
import cn.edu.besti.cs1923.cyf2313.B;
import cn.edu.besti.cs1923.cyf2313.C;
public class A{
public static void main(String[] args) {
Contact[] a = new Contact[5];
Contact[] b = new Contact[5];
a[0] = new Contact("a", "b", "2303");
a[1] = new Contact("c", "d", "2019");
a[2] = new Contact("e", "f", "2000");
a[3] = new Contact("g", "h", "1999");
a[4] = new Contact("i", "j", "1923");
b[0] = new Contact("k", "l", "123");
b[1] = new Contact("m", "n", "234");
b[2] = new Contact("o", "p", "345");
b[3] = new Contact("q", "r", "456");
b[4] = new Contact("s", "t", "567");
Contact target1 = new Contact("", "", "123");//小邊界
Contact target2 = new Contact("", "", "2303");//大邊界
Contact target3 = new Contact("", "", "1923");//正常
Contact target4 = new Contact("", "", "234");//正常
Contact target5 = new Contact("", "", "345");//正常
Contact target6 = new Contact("", "", "0010");//異常
Contact target7 = new Contact("", "", "999");//異常
Contact found[] = new Contact[10];
found[0] = (Contact) B.linearSearch(b, target1);
found[1] = (Contact) B.linearSearch(a, target2);
found[2] = (Contact) B.linearSearch(a, target3);
found[3] = (Contact) B.linearSearch(b, target4);
found[4] = (Contact) B.linearSearch(b, target5);
found[5] = (Contact) B.linearSearch(b, target6);
found[6] = (Contact) B.linearSearch(a, target7);
found[7] = (Contact) B.linearSearch(b, target7);
found[8] = (Contact) B.linearSearch(a, target6);
found[9] = (Contact) B.linearSearch(a, target1);
for (int i = 1; i <= 10; i++) {
System.out.println("Test" + i + ":");
if (found[i - 1] == null)
System.out.println("Can't found it!");
else
System.out.println("Found: " + found[i - 1]);
}
C.selectionSort(a);//倒序
C.selectionSort(b);//正序
System.out.println("Test11:");
for (Comparable play : a)
System.out.println(play);
System.out.println("Test12:");
for (Comparable play : b)
System.out.println(play);
}
}
cn.edu.besti.cs1923.cyf2313包程式碼B 程式碼C
package cn.edu.besti.cs1923.cyf2313;
public class B {
public static Comparable linearSearch(Comparable[] data,Comparable target){
Comparable result = null;
int index = 0;
while(result == null && index < data.length){
if(data[index].compareTo(target)==0)
result = data[index];
index++;
}
return result;
}
}
package cn.edu.besti.cs1923.cyf2313;
public class C {
public static void selectionSort(Comparable[] data) {
int min;
for(int index=0;index<data.length-1;index++){
min=index;
for(int scan=index+1;scan<data.length;scan++)
if(data[scan].compareTo(data[min])<0)
min=scan;
swap(data,min,index);
}
}
private static void swap(Comparable[] data,int index1,int index2){
Comparable temp=data[index1];
data[index1]=data[index2];
data[index2]=temp;
}
}
執行截圖
3.參考http://www.cnblogs.com/maybe2030/p/4715035.html ,學習各種查詢演算法並在Searching中補充查詢演算法並測試
提交執行結果截圖
Searching程式碼
package Task7_3;
public class Searching {
public static Comparable LinearSearch(Comparable[] data,Comparable target)
{
Comparable result=null;
int index=0;
while(result==null&&index<data.length)
{
if(data[index].compareTo(target)==0)
result=data[index];
index++;
}
return result;
}
//二分查詢
public static Comparable binarySearch(Comparable[] data,Comparable target)
{
Comparable result=null;
int first=0,last=data.length,mid;
while(result==null&&first<=last)
{
mid=(first+last)/2;
if(data[mid].compareTo(target)==0)
result=data[mid];
else
if(data[mid].compareTo(target)>0)
last=mid-1;
else
first=mid+1;
}
return result;
}
//順序查詢
public static<T>
boolean linearSearch(T[] data,int min,int max,T target)
{
int index=min;
boolean found=false;
while(!found&&index<=max)
{
found=data[index].equals(target);
index++;
}
return found;
}
// 插值查詢
public static int InsertionSearch(int[] a, int value, int low, int high) {
int mid = low + (value - a[low]) / (a[high] - a[low]) * (high - low);
if (a[mid] == value) {
return mid;
}
if (a[mid] > value) {
return InsertionSearch(a, value, low, mid - 1);
} else {
return InsertionSearch(a, value, mid + 1, high);
}
}
// 斐波那契查詢
public static int Fibonacci(int n) {
if(n == 0) {
return 0;
}
if(n == 1) {
return 1;
}
return Fibonacci(n - 1) + Fibonacci(n - 2);
}
public static int FibonacciSearch(int[] data,int n,int key) {
int low = 1;
int high = n;
int mid;
int k = 0;
while (n > Fibonacci(k) - 1) {
k++;
}
int[] temp = new int[Fibonacci(k)];
System.arraycopy(data, 0, temp, 0, data.length);
for (int i = n + 1; i <= Fibonacci(k) - 1; i++) {
temp[i] = temp[n];
}
while (low <= high) {
mid = low + Fibonacci(k - 1) - 1;
if (temp[mid] > key) {
high = mid - 1;
k = k - 1;
}
else if (temp[mid] < key) {
low = mid + 1;
k = k - 2;
} else {
if (mid <= n) {
return mid;
}
else {
return n;
}
}
}
return 0;
}
SearchingTest程式碼
package Task7_3;
import junit.framework.TestCase;
public class SearchingTest extends TestCase {
Integer[] a = {20, 19, 23, 3, 2303, 20, 11, 22, 26, 45, 11, 19};
Integer[] b = {13, 14, 15, 11, 19, 20, 3,23,2303,24,47,56};
Searching searching = new Searching();
@org.junit.Test
public void testLinearSearch() {
assertEquals(2303, searching.LinearSearch(a, 2303));//大邊界
assertEquals(2303, searching.LinearSearch(b, 2303));//大邊界
assertEquals(null, searching.LinearSearch(a, 0));//異常
assertEquals(null, searching.LinearSearch(b, 0));//異常
assertEquals(3, searching.LinearSearch(a, 3));//小邊界
assertEquals(3, searching.LinearSearch(b, 3));//小邊界
assertEquals(22, searching.LinearSearch(a, 22));//正常
assertEquals(11, searching.LinearSearch(b, 11));//正常
assertEquals(23, searching.LinearSearch(a, 23));//正常
assertEquals(23, searching.LinearSearch(b, 23));//正常
}
@org.junit.Test
public void testbinarySearch() {
// 正常測試
Comparable list[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 2303};
// 元素在所查詢的範圍內
assertEquals(2, Searching.binarySearch(list, 2));
assertEquals(2303, Searching.binarySearch(list, 2303)); //邊界測試
//異常
assertEquals(null, Searching.binarySearch(list, 0));
}
@org.junit.Test
public void testinsertionSearch() {
int list[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 2303};
// 元素在所查詢的範圍內
assertEquals(1, Searching.InsertionSearch(list, 2, 0, 10));
assertEquals(10, Searching.InsertionSearch(list, 2303, 0, 10)); //邊界測試
}
@org.junit.Test
public void testfibonacciSearch() {
// 正常測試
int list[] = {2, 23, 42,456, 2303};
// 元素在所查詢的範圍內
assertEquals(3, Searching.FibonacciSearch(list, 4, 456));
assertEquals(4, Searching.FibonacciSearch(list, 4, 2303)); //邊界測試
}
執行截圖
4.補充實現課上講過的排序方法:希爾排序,堆排序,二叉樹排序等(至少3個)
測試實現的演算法(正常,異常,邊界)
提交執行結果截圖
Searching 程式碼
package Task7_4;
import java.util.Arrays;
public class Searching<T> {
public void linear(int[] data, int target)
{
int count=0;
for(int i = 0; i < data.length; i++) {
if(data[i]==target){ count++;System.out.println("找到目標數的下標:"+i);
}
}
if (count==0)
System.out.println("沒有找到目標數");
else
System.out.println("共有"+count+"個");
}
public void binarySearch(int[] data,int target)
{
int count=0;
int low,high,mid;
low=0;
high=data.length-1;
while (low<=high)
{
mid=(low+high)/2;
if(data[mid]==target)
{ count++;
System.out.println("找到目標數的下標:"+mid);
break;
}
else if (data[mid]>target)
{
high=mid-1;
}
else
low=mid+1;
}
if (count==0)
System.out.println("沒有找到目標數");
else
System.out.println("共有"+count+"個");
}
public int binSearch(int srcArray[], int start, int end, int target) {
int mid = (end - start) / 2 + start;
if (srcArray[mid] == target) {
return mid;
}
if (start >= end) {
return -1;
} else if (target > srcArray[mid]) {
return binSearch(srcArray, mid + 1, end, target);
} else if (target < srcArray[mid]) {
return binSearch(srcArray, start, mid - 1, target);
}
return -1;
}
public int insertSearch(int []data,int left,int right,int target){
if(left>right || target<data[0] ||target>data[data.length-1]){
return -1;
}
int mid = left +(right - left) * (target - data[left])/ (data[right] -data[left]);
int midVal =data[mid];
if(target > midVal){
return insertSearch(data, mid+1, right, target);
}else if(target < midVal){
return insertSearch(data, left, mid-1, target);
}else {
return mid;
}
}
public static int[] fib(int []data) {
int[] f = new int[data.length];
f[0] = 1;
f[1] = 1;
for (int i = 2; i < data.length; i++) {
f[i] = f[i - 1] + f[i - 2];
}
return f;
}
public int fibSearch(int[] a, int target) {
int low = 0;
int high = a.length - 1;
int k = 0;
int mid = 0;
int f[] = fib(a);
while (high > f[k] - 1) {
k++;
}
int[] temp = Arrays.copyOf(a, f[k]);
for (int i = high + 1; i < temp.length; i++) {
temp[i] = a[high];
}
while (low <= high) {
mid = low + f[k - 1] - 1;
if (target < temp[mid]) {
high = mid - 1;
k--;
} else if (target > temp[mid]) {
low = mid + 1;
k -= 2;
} else {
if (mid <= high) {
return mid;
} else {
return high;
}
}
}
return -1;
}
}
Sorting 程式碼
package Task7_4;
public class Sorting {
public void selectionSort(int[] data)
{
int min=0;
for(int i=0;i<data.length;i++)
{
for (int j=i+1;j<data.length;j++)
{
if(data[i]>data[j])
{min=data[j];
data[j]=data[i];
data[i]=min;}
}
}
for(int i=0;i<data.length;i++)
{
System.out.println("test"+"["+i+"]"+": "+data[i]);
}
}
public void insertSort(int []data)
{
int temp;
int j ;
for(int i=1;i<data.length;i++)
{
temp=data[i];//待插入的數
for ( j=i-1;j>=0&&data[j]>=temp;j--)
{
data[j+1]=data[j];
}
data[j+1]=temp;
}
for(int i=0;i<data.length;i++)
{
System.out.println("test"+"["+i+"]"+": "+data[i]);
}
}
public void shellSort(int[] data)
{
int j = 0;
int temp = 0;
for (int increment = data.length / 2; increment > 0; increment /= 2)
{
for (int i = increment; i < data.length; i++)
{
temp = data[i];
for (j = i; j >= increment&&temp <data[j - increment]; j -= increment)
{
data[j] = data[j - increment];
}
data[j] = temp;
}
}
for(int i=0;i<data.length;i++)
{
System.out.println("test"+"["+i+"]"+": "+data[i]);
}
}
}
SearchingSortTest 程式碼
package Task7_4;
import java.util.Stack;
public class SearchingSortTest {
public static void main(String[] args) {
int []test=new int[10];
test[0]=1;
test[1]=10;
test[2]=1;
test[3]=8;
test[4]=8;
test[5]=6;
test[6]=2;
test[7]=3;
test[8]=0;
test[9]=4;
Searching searching=new Searching();
System.out.println("線性查詢: ");
searching.linear(test, 1);
Sorting sorting=new Sorting();
sorting.selectionSort(test);
searching.binarySearch(test, 2);
System.out.println("二分查詢: ");
System.out.println("找到目標數的下標:"+searching.binSearch(test, 0, test.length-1, 1));
System.out.println("插值查詢: ");
System.out.println("找到目標數的下標:"+searching.insertSearch(test, 0, test.length-1, 1));
System.out.println("斐波那契查詢: ");
System.out.println("找到目標數的下標:"+ searching.fibSearch(test,3));
/*Sorting sorting=new Sorting();*/
System.out.println("希爾排序: ");
sorting.shellSort(test);
/*Sorting sorting=new Sorting();*/
System.out.println("直接插入排序: ");
sorting.insertSort(test);
}
}
執行截圖
5.編寫Android程式對實現各種查詢與排序演算法進行測試
提交執行結果截圖
推送程式碼到碼雲
(未選做)
實驗中遇到的問題和解決方法
實驗還是挺順暢的,沒啥問題。
實驗感悟
java學習可以這樣比喻,看上去平平無奇,簡單容易,一旦親身實踐起來會發現山重水複,一山放過一山攔。但也不是沒有解決辦法,因為java學習並不是一個人的學習,你只是在走別人走過的路,在覺得無路可走的時候,不妨問問過來人,你的學長學姐,你的老師,你的同學,你會很快發現新的辦法,也就是柳暗花明。但同時,卻不能輕易忽視動手鍛鍊的重要性,這絕不侷限於老師課程要求的實驗,平時還要勤加練習,敲敲課本程式碼就很關鍵,多練,多問,多總結,學習Java才能得心應手。