An example of string truncation and Output

Requirement: If the string "1234" or "12345" is specified, the following sequence is output.

Output->

"1234", "123", "234", "12", "23", "34", "1", "2", "3", "4"

"12345", "1234", "2345", "123", "234", "345", "12", "23", "34", "45 ", "1", "2", "3", "4", "5"

Can a general method be provided?

Please pay attention to the symbol problem !!!!!!!!!!

Package COM. java. interview. algorithm;/*** name: string_output.java ** Date: 20:00:00 ** function: Output special string ** copyright: open ** @ author wangxin **/public class string_output {public static void main (string [] ARGs) {string STR = "12345"; output_string (STR );} /*** output the specified format string ** @ Param Str */Private Static void output_string (string Str) {int Len = Str. length (); For (INT I = 0; I <Len; I ++) {int COUNT = 0; For (Int J = 0; j <= I; j ++) {system. out. print ("\" "+ Str. substring (J, len-I + Count ++) + "\" "); if (I! = (LEN-1) | j! = I) {system. Out. Print (",");}}}}}

What do you see here?

Is it similar to full sorting? 650) This. width = 650; "src =" http://img.baidu.com/hi/jx2/j_0039.gif "alt =" j_0039.gif "/>

Just getting started is much easier than that.

Extend it. I will change the requirements:

A random integer string with the length of Len and no repeated values in the string. The output method shown above is provided. 650) This. width = 650; "src =" http://img.baidu.com/hi/jx2/j_0021.gif "alt =" j_0021.gif "/>

Example:

Generate a random numeric string "7902"

Output"0279", "027", "279", "02", "27", "79", "0", "2", "7", "9"

650) This. width = 650; "src =" http://img.baidu.com/hi/jx2/j_0063.gif "alt =" j_0063.gif "/>

It only increases the difficulty.

Analysis: ① repeated, string; ② ordered output;

Package COM. java. interview. algorithm; import Java. util. arrays; import Java. util. hashset; import Java. util. set;/*** name: string_output2.java ** Date: 20:30:43 ** function: Output special string ** copyright: open ** @ author wangxin **/public class string_output2 {public static void main (string [] ARGs) {string random_string = random_string (4); system. out. println ("randomly generated numeric string: \" "+ random _ String + "\" "); system. out. println ("output->"); output_string (random_string);} Private Static void output_string (string Str) {int Len = Str. length (); For (INT I = 0; I <Len; I ++) {int COUNT = 0; For (Int J = 0; j <= I; j ++) {system. out. print ("\" "+ Str. substring (J, len-I + Count ++) + "\" "); if (I! = (LEN-1) | j! = I) {system. out. print (",") ;}}} Private Static string random_string (INT Len) {If (LEN <= 0 | Len> = 10) {system. out. println ("input error, between 1-9"); Return "fasle";} int COUNT = 0; set <integer> set = new hashset <integer> (LEN ); do {set. add (INT) (math. random () * 9); Count = set. size () ;}while (count <Len); int temp [] = new int [Len]; Count = 0; For (integer INTEGER: Set) {temp [count ++] = integer;} arrays. sort (temp, 0, Len); string result = ""; for (int I: temp) {result + = I;} return result ;}}

Output example: the randomly generated numeric string is: "1678" output-> "1678", "167", "678", "16", "67", "78 ", "1", "6", "7", "8"

Not optimized. Welcome to the discussion after optimization!

This article from the "Long Way" blog, please be sure to keep this source http://wangxin88.blog.51cto.com/3228434/1537598