**这是我的第一篇文章,所以不知道我是否做对了。但是我必须阅读一个文件,然后按人口从小到大的顺序排列列表。我得到的只是阿拉巴马州,而且只出现过一次。我认为我的问题来自“for”语句,但我不确定。它也可能来自“return”语句。文件是这样设置的
阿拉巴马州,4779736
阿拉斯加州,7102313**
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;
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){
for( int count = 0; count < 50; count++){
int retcnt = 0;
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;
}
}
}
}
}