java随机从数组中取出不重复的元素
import java.util.HashSet;import java.util.Random;import java.util.Set;public class TestRandomArray {public static void main(String[] args) {String [] ids=new String[]{"a","c","b","e","f","g","h","k","x","i","p","3","4","1","m","n"};Random r=new Random();String strarray[]=new String;int index=0;for(int i=0;i<10;i++){//刚开始从数组中随机抽取一个//而后将抽取的元素后面的元素向前推进到随机的位置//随着循环的继续,逐渐抛弃后面的元素index=r.nextInt(ids.length-i);strarray=ids;//元素向前推进到随机的位置for(int j=index;j<ids.length-i-1;j++){ids=ids;}}Set<String> set=new HashSet<String>();for (String string : strarray) {System.out.print(string+" ");set.add(string);}System.out.println();System.out.println(set+","+set.size());}}
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