The number of occurrences of each letter in Java statistics ABACBACDADBC, the output format is: A (4) B (3) C (3) d (2)

Source: Internet
Author: User

Original: http://www.open-open.com/code/view/1456919325625

ImportJava.util.Iterator;ImportJava.util.Map;ImportJava.util.Set;ImportJava.util.TreeMap;/** Count the number of occurrences of each letter in the ABACBACDADBC, the output format is: A (4) B (3) C (3) d (2) * * The reason for selecting TreeMap is: Key is not duplicated and sorted out in order * idea: * 1. Convert string Abacbacdadbc to Character array * 2. Take a character, compare it to the key in TreeMap * 2.1 If there is a corresponding character in the TreeMap, then remove and increment, and then deposit TREEMAP * 2.2 If there is no corresponding character in TreeMap, the character is stored directly, value=1 /c0>*/ Public classA3b1c2_treemaptest { Public Static voidMain (string[] args) {TreeMap<string, integer> tm=NewTreemap<>(); String String= "Abacbacdadbc"; Char[] Ch=String.tochararray ();  for(Charr:ch) {            //Tm.put (string.valueof (R), 1); //System.out.println (R);             if(Comparekey (R, TM)) {intI=Tm.get (string.valueof (R)); I++;            Tm.put (string.valueof (R), i); }Else{tm.put (string.valueof (R),1);            }} System.out.println (tm); Set<map.entry<string, integer>> entryset=Tm.entryset (); Iterator<map.entry<string, integer>> iterator=Entryset.iterator ();  while(Iterator.hasnext ()) {Map.entry<string, integer> me=Iterator.next (); String Key=Me.getkey (); intValue=Me.getvalue (); System.out.print (Key+ "(" +value+ ")"); }            }     Public Static BooleanComparekey (CharC,treemap<string, integer>TreeMap) {        if(Treemap.containskey (string.valueof (c))) {return true; }        return false; }}

The number of occurrences of each letter in Java statistics ABACBACDADBC, the output format is: A (4) B (3) C (3) d (2)

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.