Question

如何用java读取txt中的java文件，并且记录其中char，int，if，while等出现的个数

Answer 1

读取java文件就要用到io了，每一个单词应该会有分隔符，可能是空格，逗号import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class FileTest {

/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
File file = new File(""/** 文件名 */
);
FileInputStream fis = new FileInputStream(file);
InputStreamReader isr = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(isr);
String sb = "";
int count = 0;
sb = br.readLine();
while (sb != null) {
String[] array = sb.split(" "/** 文件分隔符 */
);
for (String string : array) {
if (string.equals("while")) {
count++;
}
}
sb = br.readLine();
}
System.out.println(count);
}
}