有一個JAVA問題(因數分解)

Question

這是我寫的程式:
但是寫出來出現一堆亂碼
為什麼?請大師指點,謝謝!!!
import java.util.Scanner;

public class Divisors {
public static void main (String [] args) {

/* this array will be filled with the divisors of a user-supplied number. */
long number;
long[] divisorArray;
Scanner scan = new Scanner(System.in);

System.out.println(" give me a long int and I'll "
+ "return an array of all its proper divisors > ");
number = scan.nextLong(); /* this is the number whose divisors we want to find and print */

Divisors div = new Divisors(); /* here we make an instance of the Divisors class*/

divisorArray = div.getDivisors(number);/* *** here we call a non-static method getDivisors . This method has as its argument the variable number we just read. getDivisors fills a local array with the divisors of number and returns this array. */;

System.out.println("the divisors of " + number + " are:");
/* *** here we print out all non-zero elements of divisorArray. Try to print at most 10 values per line (see the sample output above). */
System.out.println("\n "+divisorArray);

}// end main

public long[] getDivisors(long num) {
long[] divisorArray=new long[100];
int i=-1;
int j;

for(j=1;j if (num%j==0){
i++;
divisorArray[i]=j;


}
}

return divisorArray;
}
}

Answer 1

　你的程式將計算的結果存到 divisorArray 這個 array 中，然後用
System.out.println("n " + divisoryArray) 的方式印出。這個方式會去
呼叫 divisoryArray 這個物件的 toString() 方法，由於 divisoryArray
是一個 Array 物件，它的 toString() 方法印出的是該物件在記憶體
中的位置，所以輸出才會是一堆隨機的英數字。建議的作法是用
一個 for 廻圈將其內容一個一個印出，請參考我的做法

for (int i = 0; i < divisorArray.length; i++) {
System.out.print(divisoryArray[i] + ", ");
if (i % 9 == 0) System.out.println(); // 10 results per line
}