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我正在为读取CSV文件的类创建程序，并对文件中给出的数据执行各种数学公式。 CSV文件是在设置：虽然文件读取器的循环麻烦？
- longitude1，latitude1，timeStamp1
- longitude2，latitude2，timeStamp2
- longitude3，latitude3，timeStamp3
（并继续对约100个不同的坐标）。
现在我专注于经度值---我很难让我的while循环执行我也需要的操作。我需要能够让程序从经度1减去经度2（其中lon1和lon2在我们经过循环时最终要经过每个坐标）。
我遇到的问题是循环没有创建'重叠'（缺少更好的术语）。它在前两个坐标上执行数学运算，然后跳到下两个数据...从而跳过其他所有操作。
[即：在循环中执行：lon2 - lon1和lon4-lon3但跳过lon3-lon2]
我有我的问题在于我，而循环的开始预感，但我真的穿上”不知道如何解决它。我会喜欢一些帮助。 以下是我目前的代码：
import java.io.*;
import java.util.*;
public class SearchAndR {
public static void main(String[] args) throws FileNotFoundException {
// creates a Scanner called "keyboard" to read in the file name
Scanner keyboard = new Scanner(System.in);
// prompts user for file name
System.out.println("Enter the name of the file you intend to read in");
// Stores file name as a string so that we may read it in
String file = keyboard.nextLine();
// creates a new Scanner called fr(short for filereader) so we can read
// in the file
// then we create a File object using the constructor new with the class
// "File"
// this takes in our string "file" as a parameter to read it in
// reading in our file object to the scanner
Scanner fr = new Scanner(new File(file));
// Creating format for hike1.csv file
System.out.println("--- Hike Analysis ---");
System.out.println("File: " + file);
// Calling HW4 Class to use in the rest of the program
HW4Util util = new HW4Util();
// Establishing counting variable for distance for the while loop
double totaldistance = 0;
while (fr.hasNextLine()) {
String line = fr.nextLine();
String[] stamp1 = line.split(",");
String line2 = fr.nextLine();
String[] stamp2 = line2.split(",");
double lon1 = Double.parseDouble(stamp1[0]);
double lat1 = Double.parseDouble(stamp1[1]);
String time1 = (stamp1[2]);
double lon2 = Double.parseDouble(stamp2[0]);
double lat2 = Double.parseDouble(stamp2[1]);
String time2 = (stamp2[2]);
// This is just to check to see if the overlap is occurring!
// This should not be included in the project.
System.out.println("this is longitude" +lon1);
System.out.println("this is longitude" +lon2);
// returns the distance between two coordinates as a fraction of a
// mile
double dist = util.distance(lat1, lon1, lat2, lon2);
totaldistance = totaldistance + dist;
totaldistance = (double) (Math.round(totaldistance * 10000))/10000;
}
System.out.println("Total distance traveled: " + totaldistance + " miles");
} // end method main
} // end class filereader