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Java 工具类—日期获得,随机数,系统命令,数据类型转换
1 package tems; 2 3 import java.text.SimpleDateFormat; 4 import java.util.Arrays; 5 import java.util.Calendar; 6 import java.util.Date; 7 imp...
分类:编程语言   时间:2015-01-31 10:33:32    阅读次数:269
Median of Two Sorted Arrays
There are two sorted arrays A and B of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)). 用二分的方法求合并数组的中值。用找第k大的值来求,不断去掉较小的一半,...
分类:其他好文   时间:2015-01-29 12:43:29    阅读次数:175
Summary: Arrays vs. Collections && The differences between Collection Interface and Collections Class
转自http://www.anylogic.com/anylogic/help/index.jsp?topic=/com.xj.anylogic.help/html/code/Arrays_Collections.htmlJava offers two types of constructs whe...
分类:其他好文   时间:2015-01-29 09:18:20    阅读次数:228
must return an Iterable of arrays.(junit4)
java.lang.Exception: TestIterator.init() must return an Iterable of arrays. at org.junit.runners.Parameterized.parametersMethodReturnedWrongType(Pa...
分类:其他好文   时间:2015-01-28 19:38:06    阅读次数:241
LeetCode --- 4. Median of Two Sorted Arrays
题目链接:Median of Two Sorted Arrays There are two sorted arrays A and B of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)). 这...
分类:其他好文   时间:2015-01-27 23:34:01    阅读次数:169
算法题:将一个数组中所有奇数放前面和偶数放后面(不开辟新的内存空间)
package arithmetic;import java.util.Arrays;public class OddAndEven { public static void main(String[] args) { int [] a={5,10,26,32,4...
分类:编程语言   时间:2015-01-27 23:26:57    阅读次数:667
算法题:找出一个数组中依次最大的k个元素
package arithmetic;import java.util.Arrays;/** * 找出一个数组中依次最大的k个元素 * @author SHI */public class FindMaxFigure { public static void main(String[] arg...
分类:编程语言   时间:2015-01-27 23:18:27    阅读次数:175
LeetCode Merge Sorted Array
Given two sorted integer arrays A and B, merge B into A as one sorted array.Note:You may assume that A has enough space (size that is greater or equal to m + n) to hold additional elements from B. The...
分类:其他好文   时间:2015-01-27 14:57:01    阅读次数:149
数组 , List互转
调用库函数:String[] s = {"aa","bb","cc","dd","ee"};List list =Arrays.asList(s);String[] s1 = (String[]) list.toArray();String[] s = {"aa","bb","cc","dd","e...
分类:编程语言   时间:2015-01-27 01:51:44    阅读次数:188
[Java] java.util.Arrays 中使用的 sort 采用的算法 (转)
http://book.douban.com/annotation/15154366/Q: java.util.Arrays 中使用的 sort 采用的是什么算法?A: java中Arrays.sort使用了两种排序方法,quick sort 和优化的 merge sort。Q: 为什么采用两种排序...
分类:编程语言   时间:2015-01-26 07:43:02    阅读次数:202
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