java讀取數字問題

在控制台輸入幾個成績寫入txt文檔中，然後在從txt中讀取出來存到數組中，再求平均值
import java.io.File;<br />import java.io.FileReader;<br />import java.io.FileWriter;<br />import java.io.IOException;<br />import java.io.InputStreamReader;<br />import java.util.ArrayList;<br />import java.util.List;<br />public class Test {<br />public static void writemethod(File file, InputStreamReader ips)<br />throws IOException {<br />FileWriter fw = new FileWriter(file);<br />if (!file.exists()) {<br />file.createNewFile();<br />}<br />int i;<br />while ((i = ips.read()) != 13) {<br />fw.write((char) i);<br />}<br />fw.close();<br />ips.close();<br />}<br />public static int readmethod(File file) throws IOException {<br />FileReader fr = new FileReader(file);<br />int i;<br />List<String> list = new ArrayList<String>();<br />while ((i = fr.read()) != -1) {<br />String val = "";<br />while (i != 32&i != -1) {<br />val = val + (char) i;<br />i = fr.read();<br />}<br />list.add(val);<br />}<br />int sum = 0;<br />for (String v : list) {<br />int kk = Integer.parseInt(v);<br />sum = sum + kk;<br />}<br />return sum / list.size();<br />}<br />public static void main(String[] args) throws IOException {<br />InputStreamReader ips = new InputStreamReader(System.in);<br />File file = new File("f://test3.txt");<br />writemethod(file, ips);<br />System.out.println(readmethod(file));<br />}<br />}