java - 如何计算行中的空格？ [JAVA]

Question

如果我有这个用于计算文件中特定单词的代码，并且我想计算行中的空格，我该如何编写它？

例如。我想计算“int a = 0;”中的空格

输出:空格为 3。

非常感谢。

我的代码:

public static  void main(String[] args) throws IOException {
    Scanner in = new Scanner (new File("/Users/BooMMacbookProRetina/Desktop/C/Resource [Java Sample file]/GradeCal.java"));

    int c1 = 0, c2 = 0, c3 = 0;

    String t1 = "int";
    String t2 = " ";
    String t3 = ";";

    while (in.hasNext()){
        String line = in.nextLine();
        line = line.trim();
        if (line.length() >0 ){

            int k = -1;
            while (true){   //Count System
                k = line.indexOf(t1, k+1);
                if (k<0) break;
                c1++;
            }
        }
    }
    System.out.println("Total number integers are: " +c1);
    System.out.println("Total number of whitespace in int line are: " +c2);

}

计数资源文件:Download from my dropbox

Answer 1

试试这个

int a = str.length() - str.replaceAll(" ", "").length();

满足您的要求

int whitespaceCount = 0;

//inside while loop
if (Character.isWhitespace(text.charAt(i)) {
        whitespaceCount++
    }