日常交作業(yè)
public void testSort3() {
List<String> stringList = new ArrayList<String>();
//隨機(jī)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(gè)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);
}
}
2020-05-26
package?basedknowledge.sortTestt; import?java.util.ArrayList; import?java.util.Collections; import?java.util.List; import?java.util.Random; /** ?*?@Description: ?*?創(chuàng)建String泛型的List,放入10條隨機(jī)的字符串 ?*?每條字符串的長(zhǎng)度為10以內(nèi)的隨機(jī)整數(shù) ?*?每條字符串的字符都是隨機(jī)生成的字符，可以重復(fù) ?*?每條隨機(jī)生成的字符串不可以重復(fù) ?*?@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(gè)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()); ????} }