Question

我正在制定一个计算20名CEO的欠款的计划。我试图使用线性搜索添加搜索功能，但每次都说“找不到xxx”。任何人帮我弄清楚我的代码有什么问题。搜索方法位于代码的末尾。请记住我是一个初学者。 THX

import java.io.*;
import javax.swing.*;
// The "CEO" class.
public class CEO
{
    public static void main (String[] args) throws IOException
    {
    BufferedReader X = new BufferedReader (new FileReader    ("G://CEO.txt"));

    FileWriter outFile = new FileWriter ("taxinfo.txt");
    PrintWriter Y = new PrintWriter (outFile);

    String line;
    double taxrate;
    for (int i = 0 ; i < 20 ; i++)
    {

        line = X.readLine ();
        String[] textarray = line.split (",");


        String name = textarray [0];

        String company = textarray [1];

        String salary = textarray [2];

        ///////////////////////////////////////////

        String namear[] = name.split (",");

        String companyar[] = company.split (",");

        String salaryar[] = salary.split (",");

        String salary2 = String.valueOf (salaryar [0]);

        double salary3 = Double.parseDouble (salary2);


        //////////////////////////////////////////

        if (salary3 <= 10000000)
        {
            taxrate = 40;
        }
        else
        {
            taxrate = 53;
        }

        calcTax (salary3, taxrate);

        Y.println (namear[0]);
        Y.println (companyar[0]);
        Y.println ((long) salary3);
        Y.println (calcTax (salary3, taxrate));
        Y.println ("");
        System.out.println (namear[0] + ", " + companyar[0] + ", $" + (long)salary3 + ", $" + (calcTax (salary3, taxrate)));

        if (i == 19)
        {
            String findMe;

            findMe = JOptionPane.showInputDialog ("Enter name to search");

            int loc;
            loc = findName (findMe, namear);
            if (loc >= 0)
            {
                JOptionPane.showMessageDialog (null, namear[loc]);
            }
            else
            {
                JOptionPane.showMessageDialog (null, findMe + " not found");
            }
        }
    }
    Y.close ();

    JOptionPane.showMessageDialog (null, "Records stored in file");

    //////////////////////////////////////////////////////////////////////////



} // main method


/////////////////////////////////////////////////////////////////////////////////////////
public static double calcTax (double salary, double taxrate)
{
    double taxowed = 0;

    taxowed = (salary * taxrate) / 100;

    return taxowed;
}


/////////////////////////////////////////////////////////////////////////////

public static int findName (String nameToFind, String array[])
{
    int place = -1;

    for (int i = 0 ; i < array.length ; i++)
    {
        if (nameToFind.equalsIgnoreCase (array [i]) == true)
        {
            place = i;
        }
    }
    return place;
}
} // CEO class

Answer 1

你正试图用你的字符串做一些不可能的事情。

＆＃13;

String[] textarray = line.split (",");
...
String name = textarray [0];
...
String namear[] = name.split (",");

＆＃13;

name不可能包含任何,，因为name来自已被,拆分的字符串。

我们假设你有一句话John,Smith,Company,Name，然后按, - ＆gt;分开结果将是一个数组[John, Smith, Company, Name]，现在您正在尝试拆分John - 这只是无法提供您想要的内容。

Answer 2

好的，伙计们，我想通了......

import java.io.*;
import javax.swing.*;
// The "CEO" class.
public class CEO
{
public static void main (String[] args) throws IOException
{
    BufferedReader X = new BufferedReader (new FileReader ("D://CEO.txt"));

    FileWriter outFile = new FileWriter ("taxinfo.txt");
    PrintWriter Y = new PrintWriter (outFile);

    String line;
    double taxrate;
    String salary2;
    double salary3;

    String names[];
    String cnames[];
    String salary[];
    String taxesowedstr[];

    names = new String [20];  
    cnames = new String [20];
    salary = new String [20];
    taxesowedstr = new String [20];

    for (int k = 0 ; k < names.length ; k++)
    {
        line = X.readLine ();
        String[] textarray = line.split (",");
        names [k] = textarray [0];
        cnames [k] = textarray [1];
        salary [k] = textarray [2];
        salary2 = String.valueOf (salary [k]);
        salary3 = Double.parseDouble (salary2);

        if (salary3 <= 10000000)
        {
            taxrate = 40;
        }
        else
        {
            taxrate = 53;
        }


        Y.println (names [k]);
        Y.println (cnames [k]);
        Y.println ((long) salary3);
        Y.println (calcTax (salary3, taxrate));
        Y.println ("");
        System.out.println (names [k] + ", " + cnames [k] + ", $" + (long) salary3 + ", $" + (calcTax (salary3, taxrate)));

        double taxes = calcTax (salary3, taxrate);

        taxesowedstr [k] = String.valueOf (taxes);

        if (k == 19)
        {
                JOptionPane.showMessageDialog (null, "Records stored in file");

            String findMe;

            findMe = JOptionPane.showInputDialog ("Enter name to search");

            int loc;
            loc = findName (findMe, names);
            if (loc >= 0)
            {
                JOptionPane.showMessageDialog (null, names [loc] + ", " + cnames [loc] + ", $" + salary [loc] + ", $" + taxesowedstr [loc]);
            }
            else
            {
                JOptionPane.showMessageDialog (null, findMe + " not found");
            }
        }

    }

    Y.close ();

} // main method


/////////////////////////////////////////////////////////////////////////////////////////
public static double calcTax (double salary, double taxrate)
{
    double taxowed = 0;

    taxowed = (salary * taxrate) / 100;

    return taxowed;
}


/////////////////////////////////////////////////////////////////////////////

public static int findName (String nameToFind, String array[])
{
    int place = -1;

    for (int i = 0 ; i < array.length ; i++)
    {
        if (nameToFind.equalsIgnoreCase (array [i]) == true)
        {
            place = i;
        }
    }
    return place;
}
} // CEO class

为什么我的搜索方法不起作用？ Java的

2 个答案: