명품 JAVA 프로그래밍 6장 OpenChallenge

명품 자바 Programming 

Chapter6 OpenChallenge

Q :

대,소문자 히스토그램 문제

Solution

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package app;   import java.io.*;   public class ABCHistogram {     private int num[] = new int[26]; //A부터 Z까지 25 대=소문자     ABCHistogram() {         for(int i = 0; i < 25;i++) {             num[i] = 0;         }     }     public void run() {         InputStreamReader rd = new InputStreamReader(System.in);         try {             while(true) {                 int c = rd.read();                 if(c == -1)                     break;                 this.counting(c);             }         }         catch(IOException e) {             System.out.println("입력 오류 발생");         }         this.draw();     }     public void counting(int c) {         if(97 <= c && c <= 122) c = c-32;         else return;         for(int i = 65; i<=90; i++) {             if(i == c) {                 num[i-65]++; //num배열 0으로 잘 초기화 됐는지 확인             }         }     }     public void draw() {         System.out.println("");         System.out.println("히스토그램을 그립니다.");         for(int i=0;i<26;i++) {             System.out.print((char)(i+65));             for(int j=0; j<num[i]; j++)                 System.out.print("-");             System.out.println("");         }              }     public static void main(String[] args) {         ABCHistogram histo = new ABCHistogram();         histo.run();     }   }   Colored by Color Scripter

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Key Point

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