import java.util.*;
public class Test
{
public static void main(String[] agrs)
{
int[] allIdList = new int[]{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};
int[] randomIdList = new Test().getRandomIdList(allIdList,10);
for(int randomIdList_index = 0;randomIdList_index < randomIdList.length;randomIdList_index++){
System.out.println(randomIdList[randomIdList_index]);
}
}
/**
*
* @author liuzhaochun
* @explain：從指定的數(shù)組中隨機(jī)取count個(gè)，返回這個(gè)數(shù)組
* @datetime:2008-5-9
* @return
* @return int [] 包含隨機(jī)取的count個(gè)值的數(shù)組
*/
public int[] getRandomIdList(int[] allIdList,int count){
int[] randomIdList = new int[count];
int randomIdList_index = 0;
for(int allIdList_index = allIdList.length - 1; randomIdList_index < count;allIdList_index--,randomIdList_index++){
int temp_Index = (int)(Math.random() * allIdList_index);
randomIdList[randomIdList_index] = allIdList[temp_Index];
allIdList[temp_Index] = allIdList[allIdList_index];
}
return randomIdList;
}
}