这是我在这里的第一篇文章，所以我不确定我是否正确发布。但是我需要帮助尝试将各州的人口按来自单独文件的从小到大的顺序排列。程序输出的所有状态都是按字母顺序排列的。该文件设置如下。
预期输入：
Alabama,4779736
Alaska,710231
Arizona,6392017
尝试排序的类：
public class Inorder {
/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
PrintWriter prw = new PrintWriter("outfile.txt");
File f = new File("census2010.txt");
if (!f.exists()) {
System.out.println("f does not exist ");
}
Scanner infile = new Scanner(f);
infile.useDelimiter("[\t|,|\n|\r]+");
final int MAX = 50;
int[] myarray = new int[MAX];
String[] statearray = new String[MAX];
int fillsize;
fillsize = fillarray(myarray, statearray, infile);
printarray(myarray, fillsize, prw);
sortarray(myarray, statearray, fillsize);
}
public static int fillarray(int[] num, String[] states, Scanner infile) {
int retcnt = 0;
for (int count = 0; count < 50; count++) {
int pop;
String state;
state = infile.next();
pop = infile.nextInt();
System.out.println(state + " " + pop + " ");
states[retcnt] = state;
num[retcnt] = pop;
retcnt++;
}
return (retcnt);
}
public static void printarray(int[] num, int fillsize, PrintWriter prw) {
for (int counts = 0; counts < fillsize; counts++) {
System.out.println("For the position [" + counts
+ "] the value is " + num[counts]);
prw.println("For the position [" + counts + "] the value is "
+ num[counts]);
}
return;
}
public static void sortarray(int[] poparray, String[] statearray,
int fillsize) {
for (int fill = 0; fill < fillsize - 1; fill = fill + 1) {
for (int compare = fill + 1; compare < fillsize; compare++) {
if (poparray[compare] < poparray[fill]) {
int poptemp = poparray[fill];
poparray[fill] = poparray[compare];
poparray[compare] = poptemp;
// do I need something here?
String statetemp = statearray[fill];
statearray[fill] = statearray[compare];
statearray[compare] = statetemp;
}
}
}
}
}