我从来没有将输出保存到文件中，而且我不知道该怎么做，所以如果有人可以帮助我，那就太棒了。如果需要，代码发布在下面。
代码：
import java.util.*;
import java.io.*;
public class Wordcount {
public static void main(String[] args) {
int vowels=0;
int punctuation=0;
int sentences=0;
int words=0;
int lines=0;
int alphaNumeric=0;
try{
//creates scanner that reads file name
Scanner input = new Scanner(System.in);
System.out.println("Enter file name: ");
//creates file object of file inputted above
File file = new File(input.nextLine());
//if statement for when the file is empty
if (file.length()==0){
System.out.println("The input file is empty.");
System.exit(1);
}
//scanner made for reading words of file
Scanner fileReader = new Scanner(file);
//new scanner is created to specifically assist in counting the
//number of lines in the file
Scanner lineCounter = new Scanner(file);
//while loop to count the lines
while (lineCounter.hasNextLine()) {
lines++;
lineCounter.nextLine();
}
//while loop that is created to examine each word of the file
while(fileReader.hasNext()){
String word = fileReader.next();
//for loop which examines each character of each word in the file
//characters are stored in temp variable ch
for (int i=0; i<word.length();i++){
char ch= word.charAt(i);
//checks for vowels
if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')
vowels ++;
//checks for sentences
if((ch=='!'||ch=='.'||ch=='?'))
sentences ++;
//checks for alphanumerical character
if(Character.isLetterOrDigit(ch))
alphaNumeric ++;
//checks for punctuation
switch(ch){
case ',': case '[': case ']': case ':': case '`': case '-':
case '!': case '_': case '(': case ')': case '.': case '?':
case '"': case ';':
punctuation ++;
break;
}
}
//increments the words and then goes back into the loop
words ++;
}
//output
System.out.println("The number of words in the file name: " + words);
System.out.println("The number of lines in the file name: " + lines);
System.out.println("The number of alphanumeric characters "
+ "in the file name: " + alphaNumeric);
System.out.println("The number of sentences in the file name: "
+ sentences);
System.out.println("The number of vowels in the file name: " + vowels);
System.out.println("The number of punctuations in the file name: "
+ punctuation);
}catch(FileNotFoundException e){
e.printStackTrace();
}
}
}