我的代码应该从 .txt 文件中读取输入，然后执行不同的操作对其进行排序。第一个 int 是长度。我的主要问题是我无法弄清楚为什么我不断收到不匹配错误，或者如果我输入“垃圾”语句，程序永远不会完成。我会先发布.txt，然后再发布程序。
15
Smith, John
26
Baker
Jones, Susan
15
Student
Mouse, Mickey
31
Theme park employee
Mouse, Mighty
48
Cartoon super hero
Anderson, William
35
Computer Programmer
Parker, Cindy
18
Author
McCain, John
20
Student
Armstrong, Michelle
17
Student
Thompson, Anne
29
Doctor
Li, Steve
15
Student
James, Tanya
20
Student
Moore, James
32
Teacher
Andrews, Julie
75
Actress
Obama, Michelle
46
Lawyer
Michaels, Todd
51
Student
//不要忘记复制末尾的空行。
程序从这里开始。
import java.util.Scanner;
import java.io.*;
public class SortAndDisplayCustomerData
{
public int length; //The length of the names, ages, and occupations arrays
public String[] names;
public int[] ages;
public String[] occupations;
public int count; //The length of the studentNames and studentAges arrays
public String[] studentNames;
public int[] studentAges;
public int i, minPos, Temp2, y, minVal;
public String Temp, Temp3, temp2, minVal2;
public void getDataFromFile()
{
Scanner keyboard = new Scanner(System.in);
Scanner inputStream = null;
System.out.println("wtf");
try
{
inputStream = new Scanner(new FileInputStream("NameAgeOcc.txt"));
}
catch(FileNotFoundException error)
{
System.out.println("Unable to open input file.");
System.exit(0);
}
System.out.println("wtf2");
length=inputStream.nextInt();
//String junk = keyboard.nextLine();
System.out.println("wtf3");
names = new String[length];
ages = new int[length];
occupations = new String[length];
for(i=0;i<length;i++)
{
names[i]=inputStream.nextLine();
ages[i]=inputStream.nextInt();
occupations[i]=inputStream.nextLine();
}
inputStream.close();
}
public void displayAllFileData()
{
System.out.println("wtf3");
System.out.printf("%-25s%-8s%24s%n","Names"," Ages"," Occupations");
for(i=0;i<length;i++)
{
System.out.printf("%-25s%6d%-24s%n",names[i],ages[i],occupations[i]);
}
}
public void sortAllDataByAge()
{
for(i=0;i<length;i++)
{
minVal=ages[i];
minPos=i;
for(y=i+1;y<length;y++)
{
if(ages[y]<minVal)
{
minVal=ages[y];
minPos=y;
}
}
Temp2 = ages[minPos];
ages[minPos] = ages[i];
ages[i] = Temp2;
Temp = names[minPos];
names[minPos] = names[i];
names[i] = Temp;
Temp3 = occupations[minPos];
occupations[minPos] = occupations[i];
occupations[i] = Temp3;
}
}
public void extractStudentData()
{
count=0;
for (i=0;i<length;i++)
{
if(occupations[i].equalsIgnoreCase("student"))
count++;
}
int j=0;
studentAges = new int[count];
studentNames = new String[count];
for (i=0;i<length;i++)
{
if(occupations[i].equalsIgnoreCase("student"))
{
studentAges[j]=ages[i];
studentNames[j]=names[i];
j++;
}
}
}
public void displayStudentData()
{
System.out.printf("%n%-25s%-8s%n","Names"," Ages");
for (i=0;i<count;i++)
{
System.out.printf("%-25s%6d%n",studentNames[i],studentAges[i]);
}
}
public void sortStudentDataAlpha()
{
for(i=0;i<count;i++)
{
minVal2=studentNames[i];
minPos=i;
for(y=i+1;y<count;y++)
{
if(studentNames[y].compareToIgnoreCase(minVal2)<0)
{
minVal2=studentNames[y];
minPos=y;
}
}
Temp = studentNames[minPos];
studentNames[minPos] = studentNames[i];
studentNames[i] = Temp;
Temp2 = studentAges[minPos];
studentAges[minPos] = studentAges[i];
studentAges[i] = Temp2;
}
}
}