如何统计存储在文本文件中程序的 Java 注释?
你可以使用 Scanner 类读取文件,并且可以使用 contains() 方法在特定行中找到注释。
范例
import java.io.*;
import java.util.Scanner;
public class FindingComments {
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(new File("HelloWorld"));
String input;
int single = 0;
int multiLine = 0;
while (sc.hasNextLine()) {
input = sc.nextLine();
if (input.contains("/*")) {
multiLine ++;
}
if(input.contains("//")) {
single ++;
}
}
System.out.println("no.of single line comments ::"+single);
System.out.println("no.of single line comments ::"+multiLine);
}
}HelloWorld 文件的内容 −
Public class SampleProgram{
/* This is my first java program.
* This will print ‘Hello World’ as the output
*/
Public static void main(String args[]){
//Prints Hello World
System.out.println("Hello World");
}
}输出
no.of single line comments ::1 no.of single line comments ::1
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