FileUtils.java

/*
김승일
깜짝과제2
 */

package s_project;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;

public class FileUtils{

    /*
    전달된 파일경로에서 파일 내용을 리턴
     */
    public String getLoadText(String filePath){
        StringBuilder sb = new StringBuilder();

        try {
            Path path = Paths.get(filePath);
            List<String> lines = Files.readAllLines(path);
            for (int i = 0; i < lines.size(); i++) {
                if (i>0){
                    sb.append("\n");
                }
                sb.append(lines.get(i));
            }
        } catch (IOException e){
            e.printStackTrace();
        }
        return sb.toString();
    }


}

s.project2.java

/*
김승일
깜짝과제1
 */


import java.util.Locale;

public class s_project2 extends FileUtils {
    public static void main(String[] args) {

        String filePath = "C:\\Users\\HOME\\IdeaProjects\\miniProject\\src\\s_project\\textSample.txt";
        FileUtils fileUtils = new FileUtils();
        String fileText = fileUtils.getLoadText(filePath);
        fileText = fileText.toLowerCase();

        int[] alphaCnt = {
                0,0,0,0,0,0,0,0,0,0,
                0,0,0,0,0,0,0,0,0,0,
                0,0,0,0,0,0
        };

        int totalCount = 0;

        for (int i = 0; i < fileText.length(); i++) {
            char c1 = fileText.charAt(i);

            if (c1 == 'a'){alphaCnt[0]++;}
            else if (c1 == 'b'){alphaCnt[1]++;}
            else if (c1 == 'c'){alphaCnt[2]++;}
            else if (c1 == 'd'){alphaCnt[3]++;}
            else if (c1 == 'e'){alphaCnt[4]++;}
            else if (c1 == 'f'){alphaCnt[5]++;}
            else if (c1 == 'g'){alphaCnt[6]++;}
            else if (c1 == 'h'){alphaCnt[7]++;}
            else if (c1 == 'i'){alphaCnt[8]++;}
            else if (c1 == 'j'){alphaCnt[9]++;}
            else if (c1 == 'k'){alphaCnt[10]++;}
            else if (c1 == 'l'){alphaCnt[11]++;}
            else if (c1 == 'm'){alphaCnt[12]++;}
            else if (c1 == 'n'){alphaCnt[13]++;}
            else if (c1 == 'o'){alphaCnt[14]++;}
            else if (c1 == 'p'){alphaCnt[15]++;}
            else if (c1 == 'q'){alphaCnt[16]++;}
            else if (c1 == 'r'){alphaCnt[17]++;}
            else if (c1 == 's'){alphaCnt[18]++;}
            else if (c1 == 't'){alphaCnt[19]++;}
            else if (c1 == 'u'){alphaCnt[20]++;}
            else if (c1 == 'v'){alphaCnt[21]++;}
            else if (c1 == 'w'){alphaCnt[22]++;}
            else if (c1 == 'x'){alphaCnt[23]++;}
            else if (c1 == 'y'){alphaCnt[24]++;}
            else if (c1 == 'z'){alphaCnt[25]++;}
        }

        for (int i = 0; i < alphaCnt.length; i++) {
            totalCount += alphaCnt[i];
        }

        for (int i = 0; i < alphaCnt.length; i++) {
            double rate = (double)alphaCnt[i] / totalCount * 100;
            String format = String.format("%c = %6d개, \t %.2f%%",i+65,alphaCnt[i],rate);
            System.out.println(format);
        }
    }
}