請問這個作業(yè)怎么改
public void testSort2() throws IOException {
List<String> rList=new ArrayList<String>();
Random random=new Random();
String s;
char a[] = null;
Scanner console=new Scanner(System.in);
int L=random.nextInt(10);
for(int i=0;i<10;i++) {
for(int w=0;w<L;w++) {
a[w]=(char)System.in.read();
}
s=new String(a);
rList.add(s);
System.out.print("已經(jīng)成功添加"+s);
for (String c : rList) {
System.out.print("元素"+c);
}
Collections.sort(rList);
for (String c : rList) {
System.out.print("元素"+c);
}
}
}
2019-07-05
public?void?testStringSort()?{ List<String>?stringList?=?new?ArrayList<String>(); String?stringSource?=?"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; char[]??stringArr?=?stringSource.toCharArray(); Random?random?=?new?Random(); for(int?i=0;i<10;i++)?{ StringBuilder?str?=?new?StringBuilder(""); int?h?=?(int)(Math.random()*10+1); do?{ for(int?p?=?0;p<h;p++)?{ int?num?=?(int)(Math.random()?*?stringArr.length); str.append(stringArr[num]); } }while(stringList.contains(str)); String?strNew?=?""+str; stringList.add(strNew); } System.out.println("-----------排序前--------------------"); for(String?str1:stringList)?{ System.out.println("元素："+str1); } Collections.sort(stringList); System.out.println("-----------排序后--------------------"); for(String?str2:stringList)?{ System.out.println("元素："+str2); } }我是這么寫的