0308库更新

.gitignore

@@ -1 +1,21 @@
-
+*.class
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+#ide config
+.metadata
+.recommenders
+.idea/
+*.iml
+rebel.*
+.rebel.*
+
+target

.project

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>coding2017</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+	</buildSpec>
+	<natures>
+	</natures>
+</projectDescription>

.settings/org.eclipse.core.resources.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=UTF-8

group02/106614649/106614649Learnin/src/com/github/Ven13/coding2017/array/ArrayUtil.java

@@ -0,0 +1,301 @@
+package com.github.Ven13.coding2017.array;
+
+public class ArrayUtil {
+
+	/**
+	 * ����һ����������a , �Ը������ֵ�����û�
+		���磺 a = [7, 9 , 30, 3]  ,   �û���Ϊ [3, 30, 9,7]
+		���     a = [7, 9, 30, 3, 4] , �û���Ϊ [4,3, 30 , 9,7]
+	 * @param origin
+	 * @return
+	 */
+	public void reverseArray(int[] origin){
+
+		int originalLen = origin.length;
+
+	    int len = originalLen;
+
+	    int temp;
+
+	    for(int i = 0; i < (originalLen/2); i++){
+
+	        temp = origin[len - i - 1];
+
+	        origin[len - i - 1] = origin[i];
+
+	        origin[i] = temp;
+
+	    }
+	}
+
+	/**
+	 * ���������µ�һ�����飺   int oldArr[]={1,3,4,5,0,0,6,6,0,5,4,7,6,7,0,5}   
+	 * Ҫ������������ֵΪ0����ȥ��������Ϊ0��ֵ����һ���µ����飬���ɵ�������Ϊ��   
+	 * {1,3,4,5,6,6,5,4,7,6,7,5}  
+	 * @param oldArray
+	 * @return
+	 */
+
+	public int[] removeZero(int[] oldArray){
+
+		// ���������鳤�ȱ���
+	    int newLength = 0;
+	    // ��������鳤��ֵ
+	    for (int i = 0; i < oldArray.length; i++) {
+
+	    	if(oldArray[i] != 0) {
+
+	    		newLength++;
+
+	    	}
+
+	    }
+
+	    // ����������
+	    int[] newArray = new int[newLength];
+	    // �����������±����
+	    int n = 0;
+	    // ת������
+	    for (int i = 0; i < oldArray.length; i++) {
+
+	    	if(oldArray[i] != 0) {
+
+	    		newArray[n] = oldArray[i];// ת������
+	            n++;// �������±�ƫ��
+
+	    	}
+
+	    }
+
+	    //�������ɵ�������
+	    return newArray;
+
+	}
+
+	/**
+	 * ���������Ѿ�����õ��������飬 a1��a2 ,  ����һ���µ�����a3, ʹ��a3 ����a1��a2 ������Ԫ�أ� ������Ȼ�������
+	 * ���� a1 = [3, 5, 7,8]   a2 = [4, 5, 6,7]    �� a3 Ϊ[3,4,5,6,7,8]    , ע�⣺ �Ѿ��������ظ�
+	 * @param array1
+	 * @param array2
+	 * @return
+	 */
+
+	public int[] merge(int[] array1, int[] array2){
+
+		int[] newArray = new int[array1.length + array2.length];
+
+		int k = 0;
+
+		String inNum = "";
+
+		for(int i = 0; i < array1.length; i++) {
+
+			for(int j = 0; j < array2.length; j++) {
+
+				if (array1[i] < array2[j]) {
+					if (inNum.indexOf(array1[i] + "|") < 0) {
+						newArray[k++] = array1[i]; 
+						inNum += array1[i] + "|"; 
+					}
+
+				} else if (array1[i] == array2[j]) { 
+					if (inNum.indexOf(array1[i] + "|") < 0) {
+						newArray[k++] = array1[i]; 
+						inNum += array1[i] + "|"; 
+					}
+				} else {
+					if (i == array1.length - 1) {
+						if (inNum.indexOf(array1[i] + "|") < 0) {
+							newArray[k++] = array1[i]; 
+							inNum += array1[i] + "|"; 
+						}
+					} else {
+						if (inNum.indexOf(array2[j] + "|") < 0) {
+							newArray[k++] = array2[j]; 
+							inNum += array2[j] + "|"; 
+						}
+					}
+
+				}
+
+			}
+
+		}
+
+        return newArray;    
+	}
+	/**
+	 * ��һ���Ѿ��������ݵ����� oldArray������������չ�� ��չ��������ݴ�СΪoldArray.length + size
+	 * ע�⣬�������Ԫ��������������Ҫ����
+	 * ���� oldArray = [2,3,6] , size = 3,�򷵻ص�������Ϊ
+	 * [2,3,6,0,0,0]
+	 * @param oldArray
+	 * @param size
+	 * @return
+	 */
+	public int[] grow(int [] oldArray,  int size){
+		int[] newArray = new int[oldArray.length + size];
+		return newArray;
+	}
+
+	/**
+	 * 쳲���������Ϊ��1��1��2��3��5��8��13��21......  ������һ�����ֵ�� ����С�ڸ�ֵ������
+	 * ���磬 max = 15 , �򷵻ص�����Ӧ��Ϊ [1��1��2��3��5��8��13]
+	 * max = 1, �򷵻ؿ����� []
+	 * @param max
+	 * @return
+	 */
+	public int[] fibonacci(int max){
+		return null;
+	}
+
+	/**
+	 * ����С�ڸ������ֵmax��������������
+	 * ����max = 23, ���ص�����Ϊ[2,3,5,7,11,13,17,19]
+	 * @param max
+	 * @return
+	 */
+	public int[] getPrimes(int max){
+
+		int[] newArray = new int[max];
+
+		int k = 0;
+
+		boolean isN = true;
+
+		if (max > 2) {
+
+			for (int i = 2; i < max; i++) {
+
+				isN = true;
+
+				for (int j = 2; j < max; j++) {
+
+		            if (i % j == 0 && i != j) {
+
+		               isN = false;
+
+		            }
+		        }
+
+				if (isN) {
+
+					newArray[k++] = i;
+
+				}
+
+	        }
+
+		} else if (max == 2) {
+
+			newArray[0] = 2;
+			k++;
+		} else {
+
+			return null;
+
+		}
+
+		int[] newArray2 = new int[k];
+
+		for(int i = 0; i < k; i ++) {
+
+			newArray2[i] = newArray[i];
+
+		}
+
+		return newArray2;
+	}
+
+	/**
+	 * ��ν���������� ��ָ�����ǡ�õ�����������֮�ͣ�����6=1+2+3
+	 * ����һ�����ֵmax�� ����һ�����飬 ��������С��max ����������
+	 * @param max
+	 * @return
+	 */
+	public int[] getPerfectNumbers(int max) {
+
+		int i, j, k;
+
+		int sum;  
+
+		k = 0;
+
+        for(i = 1; i <= max; i++) { 
+
+
+            sum = 0; 
+
+            for(j = 1; j < i; j++) { 
+
+                if(i % j == 0) { 
+
+                    sum += j; 
+
+                } 
+
+            } 
+
+                if(i == sum)  
+                    k++;
+        }  
+
+		int[] newArray = new int[k];
+
+		k = 0;
+
+		for(i = 1; i <= max; i++) { 
+
+
+            sum = 0; 
+
+            for(j = 1; j < i; j++) { 
+
+                if(i % j == 0) { 
+
+                    sum += j; 
+
+                } 
+
+            } 
+
+                if(i == sum) {
+
+                	newArray[k] = i;
+
+                	k++;
+
+                }
+
+        } 
+
+
+		return newArray;
+	}
+
+	/**
+	 * ��seperator ������ array����������
+	 * ����array= [3,8,9], seperator = "-"
+	 * �򷵻�ֵΪ"3-8-9"
+	 * @param array
+	 * @param s
+	 * @return
+	 */
+	public String join(int[] array, String seperator){
+
+		String str = "";
+
+		for(int i = 0; i < array.length; i++) {
+
+			str += array[i] + seperator;
+
+		}
+
+		str = str.substring(0, str.length() - 1);
+
+		return str;
+	}
+
+
+
+}

group02/106614649/106614649Learnin/src/com/github/Ven13/coding2017/array/test/ArrayUtilTest.java

@@ -0,0 +1,46 @@
+package com.github.Ven13.coding2017.array.test;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+import com.github.Ven13.coding2017.array.ArrayUtil;
+
+public class ArrayUtilTest {
+
+	@Test
+	public final void testMerge() {
+		ArrayUtil arrayUtil = new ArrayUtil(); 
+		int[] a1 = {3, 5, 7, 8};
+		int[] a2 = {4, 5, 6, 7};
+		int[] a3 = {};
+		a3 = arrayUtil.merge(a1, a2);
+		assertEquals(3, a3[0]);
+		assertEquals(4, a3[1]);
+		assertEquals(5, a3[2]);
+		assertEquals(6, a3[3]);
+		assertEquals(7, a3[4]);
+		assertEquals(8, a3[5]);
+
+	}
+
+	@Test
+	public final void testgetPrimes() {
+		ArrayUtil arrayUtil = new ArrayUtil(); 
+		int max = 23;
+		int[] a1 = {};
+		a1 = arrayUtil.getPrimes(max);
+		assertEquals(3, a1.length);
+		assertEquals(1, a1[0]);
+		assertEquals(2, a1[1]);
+		assertEquals(3, a1[2]);
+	}
+
+	@Test
+	public final void testgetPerfectNumbers() {
+		ArrayUtil arrayUtil = new ArrayUtil(); 
+		int max = 6;
+		int[] a1 = {};
+		a1 = arrayUtil.getPerfectNumbers(max);
+	}
+}