參考壹下:
import?java.util.ArrayList;import?java.util.Collections;
import?java.util.List;
public?class?Ttl?{
public?static?void?main(String[]?str)?{
List<Integer>?list?=?new?ArrayList<Integer>();
for?(int?i?=?0;?i?<?5;?i++)?{
list.add(i);
}
Collections.shuffle(list);
System.out.println(list.get(0));
}
}