补贴

[zhangjianying]

等我写完回答答案的时候 贴主已经结账了 郁闷
不过还是贴出我的答案 交流交流
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Vector;
import java.util.Random;

/*
* 随机输出类
* */
public class RandomArray {
private Object[] obj;

public RandomArray(Object[] obj) {
if (obj == null)
throw new NullPointerException();
this.obj = obj;
}

public Enumeration GetEnumeration() {
Vector retval = new Vector();
Random rand = new Random(System.currentTimeMillis());

int length = this.obj.length;
int[] isHave = new int[length];// 记录是否被随机抽取过
int value;
for (int i = 0; i < length; i++) {
do {
value = rand.nextInt(length);
} while (isHave[value] != 0);

isHave[value] = 1;
retval.add(this.obj[value]);
}

return retval.elements();
}
}

[zhangjianying]

测试类
import java.util.Enumeration;
public class Demo {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Object[] i={1,2,3,4,5};
RandomArray a=new RandomArray(i);
Enumeration en =a.GetEnumeration();
while (en.hasMoreElements())
System.out.println(en.nextElement());
}

}

[xdgavin]

哈哈，发铁的人就是我，不过谢谢你了。