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/*This assignment is to create 2 parallel arrays – jobs& salaries
*Read file from 「careers.txt」 into arrays
*one line – job
*next line –salary
*Sort Salaries {from highest}
*then swap jobs if salary swapped
*Display output of careers and salaries from the highest on a formatted table.
*
*/
package assignment7;
import java.util.*;//importing Scanner
public class Coordinator
{
public static void main(String[] args) throws Exception
{// the main method creates the arrays and calls on each method to perform
//its work.
String [] job = new String[20];//creating a string array having 20 spaces
int[] salary = new int[20];//creating an integer array having 20 spaces
int count;// number of spaces actually occupied in the array
**count = readFile(job, salary);**// calling a method to read text into both
//arrays and return the number of spaces
//occupied in the array
sorter(job,salary,count);// calling on method to arrange file from highest
//to lowest
display(job, salary,count);// calling on method present the output
}
public static int readFile(String[] jobber, int[] salaro) throws Exception
{ // this method reads a text file and copies into arrays and also
//returns the number of spaces occupied in the array
int n = 0; //keeps track of number of times a line is fed into an
//array
//set up a file class object linked up to the name of the file to
//be read
java.io.File unread = new java.io.File("career.txt");
// create a scanner instance to read the input from the file
Scanner infile = new Scanner(unread);
/*This while loop reads line of text into the arrays, it uses
* boolean
* function hasNextLine() and the created scanner instance.
*/
while (infile.hasNextLine() || infile.hasNextInt())
{
jobber[n] = infile.nextLine();
**salaro[n] = infile.nextInt()**;
n++;
}//end while
infile.close();//close scanner class
return n;// return number of spaces filled
}//end of readFile method
public static void sorter(String[] jobestic, int[] salawe, int z)
throws Exception
{// this method sorts the array from the highest paid job to the lowest.
boolean swapped;// keeps track of when a swap takes place
int i;// variable fo for loop
int temp;// helps in swap
String temp2;// helps in swap
do
{
swapped = false;
for (i= 0; i < z-1; i++)// a pass through the array
{
if (salawe[i+1] > salawe[i])
// if the number before it is less they swap
{
//swap starts
temp = salawe[i+1];
salawe[i+1] = salawe[i];
salawe[i] = temp;
//swaps the jobs too if the salary is swapped
temp2 = jobestic[i+1];
jobestic[i+1] = jobestic[i];
jobestic[i] = temp2;
swapped = true;
}// end if
}// end for
} while (swapped);
}// end sorter method
public static void display(String[] jobo, int[] salary5 ,int k) throws Exception
{
//this method displays the output as a formatted table
int i;
System.out.printf("%-60s%15s%n", "Job", "Salary");
for(i=0; i<k; i++)
System.out.printf("%-60s%,15d%n", jobo[i], salary5[i]);
}
}
請老兄，這段代碼有什麼問題？我一遍又一遍地思索着我的大腦，無法弄清楚什麼是錯誤的......我運行了這段代碼，但是我一直在收到錯誤...錯誤總是表明粗體行。我正在嘗試閱讀的文本文件如下。我想將工作職位存儲在一個數組中，並將相應的工資存儲在另一個數組中。像並行陣列一樣。請問代碼有什麼問題？我想將工資存儲爲整數，因爲我在呈現輸出時將其格式化爲整數。 謝謝。從java中的文本文件中讀取字符串和整數
Computer and Information Research Scientists
102190
Computer and Information Analysts
80460
Computer Systems Analysts
79680
Information Security Analysts
86170
Software Developers and Programmers
87100
Computer Programmers
74280
Software Developers(Applications)
90060
Software Developers(Systems Software)
99000
Web Developers
62500
Database and Systems Administrators and Network Architects
76880
Database Administrators
77080
Network and Computer Systems Administrators
72560
Computer Network Architects
91000
Computer Support Specialists
48900
Computer User Support Specialists
46420
Computer Network Support Specialists
59090
錯誤：
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:909)
at java.util.Scanner.next(Scanner.java:1530)
at java.util.Scanner.nextInt(Scanner.java:2160)
at java.util.Scanner.nextInt(Scanner.java:2119)
at assignment7.Coordinator.readFile(Coordinator.java:56)
at assignment7.Coordinator.main(Coordinator.java:25)
你會得到什麼錯誤？ –
停下。放下所有這些代碼。開始一個新項目，重點放在文件IO上。儘可能簡化代碼。試着弄清楚如何做文件IO。如果你在這個簡短的小項目中遇到了問題，那就把它帶到這裏吧，所以我們不需要閱讀大量代碼，這些代碼與你看起來沒有任何問題無關。 – nhgrif
@nhgrif我明白你的意思，但是這段代碼是用來練習File IO的，而且我似乎在某個地方有問題。請幫助我通過它。謝謝。 – user2913790