准备一个文本文件，里面每行写一个数字，读进来，求平均值,java
答案:3 悬赏:20 手机版
解决时间 2021-02-25 00:43
- 提问者网友：半生酒醒
- 2021-02-24 20:10
准备一个文本文件，里面每行写一个数字，读进来，求平均值,java
最佳答案
- 五星知识达人网友：你哪知我潦倒为你
- 2021-02-24 20:22
public static void main(String[] args) throws Exception{
BigDecimal decimal = new BigDecimal(0);
int index = 0;
String path = "d:/remind.txt";
BufferedReader reader = new BufferedReader(new FileReader(path));
String line = "";
while((line = reader.readLine())!=null){
decimal = decimal.add(new BigDecimal(line));
index++;
}
System.out.println(decimal.divide(new BigDecimal(index),2,RoundingMode.HALF_UP));
reader.close();
}
BigDecimal decimal = new BigDecimal(0);
int index = 0;
String path = "d:/remind.txt";
BufferedReader reader = new BufferedReader(new FileReader(path));
String line = "";
while((line = reader.readLine())!=null){
decimal = decimal.add(new BigDecimal(line));
index++;
}
System.out.println(decimal.divide(new BigDecimal(index),2,RoundingMode.HALF_UP));
reader.close();
}
全部回答
- 1楼网友：往事隔山水
- 2021-02-24 21:00
public class Demo {
public static void main(String[] args) {
File file = new File("D:/demo.txt");
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
String line = null;
int count = 0;
int sum = 0;
while ((line = reader.readLine()) != null) {
System.out.print(line+",");
sum += Integer.valueOf(line.trim());
count++;
}
System.out.println();
System.out.println("总个数为: " + count + " 总和为: " + sum + " 平均值为: " + sum / count);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
- 2楼网友：玩家
- 2021-02-24 20:27
public class Demo {
public static void main(String[] args) {
File file = new File("D:/demo.txt");
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
String line = null;
int count = 0;
int sum = 0;
while ((line = reader.readLine())
我要举报
如以上问答信息为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！
大家都在看
推荐资讯