日常交作業

public void testSort3() {

List<String> stringList = new ArrayList<String>();

//隨機字符串

String strs = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

int strsLen = strs.length();

Random rd = new Random();

for(int i=1;i<=10;i++) {

String str = "";

do {

int strLen = rd.nextInt(10);

if(strLen == 0) strLen = rd.nextInt(10);

System.out.println(strLen);

for(int j=0;j<strLen;j++) {

int index = rd.nextInt(strsLen-1);

char s = strs.charAt(index);

str = str+s;

}

}while(stringList.contains(str));

System.out.println("第"+i+"個字符串："+str);

stringList.add(str);

}

System.out.println("---------------------排序前------------------");

for(String string : stringList) {

System.out.println("元素："+string);

}

System.out.println("---------------------排序后------------------");

Collections.sort(stringList);

for(String string : stringList) {

System.out.println("元素："+string);

}

慕雪8679015

2020-02-28

源自：Java入門第三季 6-5

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慕粉1922375890
2020-05-26

package?basedknowledge.sortTestt;

import?java.util.ArrayList;
import?java.util.Collections;
import?java.util.List;
import?java.util.Random;

/**
?*?@Description:
?*?創建String泛型的List,放入10條隨機的字符串
?*?每條字符串的長度為10以內的隨機整數
?*?每條字符串的字符都是隨機生成的字符，可以重復
?*?每條隨機生成的字符串不可以重復
?*?@Author?zhiming
?*?@Date?2020/5/26?22:34
?**/
public?class?sortTest?{
????public?List<String>?ls?=?new?ArrayList();
????public?String?str?=?"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ012345678";
????Random?randomInt?=?new?Random();
????Integer?k;


????/*
?????*?@Description:?生成一個符合要求的序列
?????*?@Param:
????**/
????public?List<String>?creatList(){
????????for?(int?i=0;?i<10;?i++){
????????????StringBuffer?sb?=?new?StringBuffer();
????????????do?{
????????????????k?=?randomInt.nextInt(10);
????????????????for?(int?j=0;?j<k+1;?j++){
????????????????????sb.append(str.charAt(randomInt.nextInt(str.length())));
????????????????}
????????????}while?(ls.contains(sb));
????????????ls.add(sb.toString());
????????}
????????return?ls;
????}

????public?void?sort(List?ls){
????????System.out.println("-----------排序前輸出：-----------");
????????for(Object?str:ls){
????????????System.out.println(str);
????????}

????????Collections.sort(ls);

????????System.out.println("-----------排序后輸出：-----------");
????????for(Object?str:ls){
????????????System.out.println(str);
????????}
????}

????public?static?void?main(String[]?args)?{
????????sortTest?st?=?new?sortTest();
????????st.sort(st.creatList());
????}

}