使用Ascii字符而不是Char

时间:2015-03-27 14:23:37

标签: java char ascii

所以我在下面有一段代码加载到文本文件中并对其进行分析,以显示存储在文本文件中的单词或句子中每个字母的百分比。

我希望能够使用char []代码,而不是使用ASCII个字母。

我不确定如何去做,所以任何帮助都会受到赞赏!

这是我到目前为止的代码:

import java.io.File;
    import java.util.Scanner;

    public class testing {
        @SuppressWarnings("resource")
        public static void main(String[] args){ 
            Scanner scan;
                    try {
                        scan = new Scanner(new File("G:/test.txt")); //change directory to load in text file
                            } 
                        catch (Exception e) {
                            System.out.println("File was not found ");
                                return;
                  }
                  int[] count = new int[26];
                    int total = 0;
                        while(scan.hasNextLine()) {
                            String text2 = scan.nextLine();
                                System.out.println ("\n--------------------------------------------------------------------------------------------------------");
                                System.out.println ("                            Words loaded in from the file: " + text2);
                                System.out.println ("--------------------------------------------------------------------------------------------------------");
                                System.out.print("\n");
                                System.out.print("");
                    char[] letters = text2.toCharArray();
                            char[] letters1 = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n','o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
                                for(int i = 0; i < letters.length; i++) {
                                    for(int j = 0; j < 26; j++) {
                                if(letters[i] == letters1[j]) {
                          count[j]++;
                          total = total + 1;
                          break;
                        }
                      }
                    }
                                for (int i = 0; i < 26; i++){
                      System.out.format("|    "+ letters1[i]+"    ");
                  }
                    System.out.println ("\n----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                  for (int i = 0; i < 26; i++){
                    float percentage = 0; 
                    if (count[i] > 0)
                        percentage = ((float) count[i]/total)*100;
                      System.out.format("|  "+percentage+ "%%   ");
                      }
                        }
            }
        }

2 个答案:

答案 0 :(得分:2)

Java中的char只是一个无符号的16位整数,包含与该字符关联的Unicode代码点(至少如果它在BMP中)。 Unicode是ASCII的超集,因此您的char[]已经包含了您正在处理的字符的ASCII值。

答案 1 :(得分:0)

char可以转换为int(0-127)(see here),因此很容易将其保存在数组中。您只需编辑代码中使用拉丁字母表的部分,并用更大的数组替换它。

这应该有效:

int[] count = new int[128];
int total = 0;
while (scan.hasNextLine()) {
    String text2 = scan.nextLine();
    System.out.println ("\n--------------------------------------------------------------------------------------------------------");
    System.out.println ("                            Words loaded in from the file: " + text2);
    System.out.println ("--------------------------------------------------------------------------------------------------------");
    System.out.print("\n");
    System.out.print("");
    char[] letters = text2.toCharArray();
    for (int i = 0; i < letters.length; i++) {
            count[letters[i]]++;
            total++;
    }
    System.out.println("\n----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
    for (int i = 0; i < letters.length; i++) {
        float percentage = 0;
        if (count[1] > 0)
            percentage = ((float) count[i] / total) * 100;
        System.out.format("|  " + percentage + "%%   ");
    }
}

我不知道以下部分应该做什么,所以我跳过它:

 for (int i = 0; i < 26; i++){
                      System.out.format("|    "+ letters1[i]+"    ");
}