每日代码保手感---1 - 黑马程序员技术交流社区

import java.util.Map;
import java.util.HashMap;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
public class ScoreStat
{
public static void main(String[] args) throws IOException
{
for(int i = 1; i <= 5; i++){
System.out.println("Please input student "+i+" related infomation:");
Map<String,String> stuInfo = getInput();
double avg = avg(Double.parseDouble(stuInfo.get("Chinese")),Double.parseDouble(stuInfo.get("Math")),Double.parseDouble(stuInfo.get("English")));
stuInfo.put("Avg",avg+"");
if(save(stuInfo)){
System.out.println("OK");
}
else{
System.out.println("Error");
}
}
}
private static Map<String,String> getInput() throws IOException{
Map<String,String> stu = new HashMap<String,String>();
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String buf = null;
System.out.println("********************************************");
System.out.print("Student No: ");
buf = br.readLine();
stu.put("stuNo",buf);
System.out.print("Student name: ");
buf = br.readLine();
stu.put("Name",buf);
System.out.print("Score of Chinese: ");
buf = br.readLine();
stu.put("Chinese",buf);
System.out.print("Score of Math: ");
buf = br.readLine();
stu.put("Math",buf);
System.out.print("Score of English: ");
buf = br.readLine();
stu.put("English",buf);
return stu;
}
private static double avg(double score1,double score2,double score3){
return (score1 + score2 + score3) / 3;
}
private static boolean save(Map<String,String> stuInfo) throws IOException{
BufferedWriter bw = new BufferedWriter(new FileWriter("F:\\scores.txt",true));
bw.write("StuNo: "+stuInfo.get("stuNo"));
bw.newLine();
bw.write("Name: "+stuInfo.get("Name"));
bw.newLine();
bw.write("Chinese: "+stuInfo.get("Chinese"));
bw.newLine();
bw.write("Math: "+stuInfo.get("Math"));
bw.newLine();
bw.write("English: "+stuInfo.get("English"));
bw.newLine();
bw.write("Avg: "+stuInfo.get("Avg"));
bw.newLine();
bw.write("***********************");
bw.newLine();
bw.close();
return true;
}
}

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