package?imooc;
import?java.util.ArrayList;
import?java.util.Collections;
import?java.util.List;
import?java.util.Random;
public?class?cTest?{
public?void?sortTest(){
List<String>?list=new?ArrayList<String>();
Random?random=new?Random();
for(int?i=0;i<10;i++)//十條字符串
{
StringBuilder?string=new?StringBuilder();
do
{int?k=random.nextInt(9)+1;//隨機生成長度,防止生成空字符串
for(int?n=0;n<k;n++)//往字符串里隨機添加字符
{
int?c=random.nextInt(10);
string.append(c);
}
}
while(list.contains(string));
list.add(string.toString());
}
//打印
System.out.println("----------排序前----------");
for(String?a:list){
System.out.println(a);
}
Collections.sort(list);//排序
System.out.println("");
//打印
????System.out.println("----------排序后----------");
????for(String?a:list){
System.out.println(a);
}
}
public?static?void?main(String[]?args)?{
//?TODO?Auto-generated?method?stub
????????cTest?test=new?cTest();
????????test.sortTest();
}
}