長整數

mport java.io.*;
import java.util.*;


// inputtext.txt 檔案內容 COFFEE 50 4
// 從檔案讀入一列字串,讀入50 和 4 相乘再寫入另一檔案
class TestReadWrite0514
{

public static void main(String[] args)
{
String line,item,la,lb;
long num,price,total;
try
{
FileReader inputjerry=new FileReader("inputtext.txt");
BufferedReader binputjerry=new BufferedReader(inputjerry);
line=binputjerry.readLine();
StringTokenizer stline=new StringTokenizer(line, " ");
item=stline.nextToken();
System.out.println(item);
num=Long.parseLong(stline.nextToken()); //利用Long轉換String
System.out.println(num);
price=Long.parseLong(stline.nextToken());
System.out.println(price);
total=price+num;
System.out.println(total);

FileWriter outputjerry=new FileWriter("outputtext.txt");
BufferedWriter boutputjerry=new BufferedWriter(outputjerry);
boutputjerry.write(String.valueOf(total));
boutputjerry.flush();


boutputjerry.close();
}
catch(Exception e)
{
System.out.println("Exception");
}
}
}