java - 文件 IO，未正确检查值并输出到文件？

Question

我正在开发一个程序，该程序应该获取一个包含人员和工资值的文本文件，然后将高于 250,000 的工资打印到输出文件 (OVER250000.txt) 并打印到控制台。我正在解析的文档的部分示例是:

Agency  Lastname    Firstname   Middlename  JobTitle    BasePay OtherComp   TotalComp
CLEMSON UNIVERSITY  MCCORMICK   ROBERT      DEAN    250000  0   250000
CLEMSON UNIVERSITY  ELLIOTT ANTONIO     ATHLETICS COACH 249900  0   249900
CLEMSON UNIVERSITY  SMITH   AUDRA       ATHLETICS COACH 249900  0   249900
CLEMSON UNIVERSITY  REED    MICHAEL     ATHLETICS COACH 249900  0   249900
CLEMSON UNIVERSITY  SCOTT   JEFFREY     ATHLETICS COACH 249900  0   249900
MEDICAL UNIVERSITY OF SC    SHAW    DARLENE     ASSOCIATE PROVOST   247881  0    76195
MEDICAL UNIVERSITY OF SC    LEITE   LUIS        DEPARTMENT CHAIR/HEAD   246474  0   246474
MEDICAL UNIVERSITY OF SC    BARRY   JOHN        ASSOCIATE DEAN  246353  0   246353

我尝试将所有内容都编码出来，但由于某种原因，它输出的文件 (OVER250000.txt) 是空的，而且它只是读取并打印出所有人员及其工资，而不是仅读取超过 250,000 的人员**

public class SalaryAnalyzer {
static final String IN_FILE_NAME = "StateOfSC-Salary-List-04012015.txt";
static final String OUT_FILE_NAME = "OVER250000.txt";
static final String DELIM = "\t";

public static void main(String[] args) throws IOException {
    System.out.println("Let's see how many state employees make over $250,000 and work at USC.");
    analyzeEmployeeFile(IN_FILE_NAME);
    System.out.println("Results have been printed to " + OUT_FILE_NAME);
}

public static void analyzeEmployeeFile(String fileName) throws IOException {
    String text = "";
    int noLines = 0;
    //Create a buffer reader object to read file
    BufferedReader br = new BufferedReader(new FileReader(fileName));
    //Ignore first line of file
    String line = br.readLine();
    //Read from the second line onwards
    while ((line = br.readLine()) != null) {
        String strs[] = line.split(DELIM);
        System.out.println(line);
        //Check if salary is greater than 250,000

        if (Double.parseDouble(strs[6]) > 250000) {
            text = text + "\n" + line;
            noLines++;
        }
    }
    printToSalaryFile(OUT_FILE_NAME, text);
}

//Will print contents to output file
public static void printToSalaryFile(String fileName, String text) throws FileNotFoundException {
    //Create a PrintWriter object to write data to output file
    PrintWriter writeToFile = new PrintWriter(new File(fileName));
    String lines[] = text.split("\n");
    //Print all records
    for (int i = 0; i < lines.length; i++) {
        System.out.println(lines[i]);
        writeToFile.println(lines[i]);
    }
    writeToFile.close();
}

Answer 1

更改此代码(请参阅内联注释)

while ((line = br.readLine()) != null) {
    String strs[] = line.split(DELIM);
    System.out.println(line);        // comment this line if you don't want it printed to console
    //Check if salary is greater than 250,000

    if (Double.parseDouble(strs[5]) > 250000) {  // arrays are zero based so change to 5  
                                                 // or if this is total package then index is 7
        text = text + "\n" + line;
        noLines++;
    }
}