产生n个，从n到n的 不重复随机数集合

package com;import java.util.ArrayList;import java.util.List;//生成从指定数到指定数的指定个数的不重复的随机数public class MathUtits {//产生sumNumber个，从startNumber到endNumber的不重复随机整数集合public static List<Integer> GetIntMathNumber(int startNumber,int endNumber,int sumNumber){List<Integer> SumNumber = new ArrayList<Integer>();while(SumNumber.size() < sumNumber){Integer num = null;if(endNumber - startNumber < 10){num = (int)Math.round(Math.random()*10);}else{num = (int)Math.round(Math.random()*(endNumber-startNumber)+startNumber);}if(!SumNumber.contains(num)){SumNumber.add(num);//System.out.println(num);}}return SumNumber;}//产生sumNumber个，从startNumber到endNumber的不重复随机浮点数集合public static List<Double> GetDoubleMathNumber(double startNumber,double endNumber,int sumNumber){List<Double> SumNumber = new ArrayList<Double>();while(SumNumber.size() < sumNumber){Double num = null;if(endNumber - startNumber < 10){num = (double)Math.round(Math.random()*10);}else{num = (double)Math.round(Math.random()*(endNumber-startNumber)+startNumber);}if(!SumNumber.contains(num)){SumNumber.add(num);//System.out.println(num);}}return SumNumber;}/** * @param args */public static void main(String[] args) {GetIntMathNumber(1,15,6);}}