输入一个数组(以""结束)并排序输出，运行出有关问题，请大家看上如何解决

输入一个数组(以"#"结束)并排序输出，运行出问题，请大家看下怎么解决
import java.awt.*;
import java.util.*;
import javax.swing.*;
public class ArraySort
{
private int a[],num;
public ArraySort(int n)
{
a=new int[n];
num=n;
}
public void putIn()
{
for(int i=0;i<num;i++)
{
System.out.print("a["+i+"]=");
Scanner scan=new Scanner(System.in);
if(scan.equals("#")){num=i;break;}
a[i]=scan.nextInt();
}
}
public void putOut()
{
for(int i=0;i<num;i++)
{
for(int j=i;j<num;j++)
{
if(a[i]>a[j])
{
int t=a[i];
a[i]=a[j];
a[j]=t;
}
}
System.out.print(a[i]+" ");
}
System.out.println();
}
public static void main(String args[])
{
ArraySort array=new ArraySort(5);
array.putIn();
array.putOut();
}
}

[解决办法]
scan输入，先获得值再做判断。只要修改 putin()函数

Java code

import java.awt.*;import java.util.*;import javax.swing.*;public class ArraySort {    private int a[], num;    public ArraySort(int n) {        a = new int[n];        num = n;    }    public void putIn() {        for (int i = 0; i < num; i++) {            System.out.print("a[" + i + "]=");            Scanner scan = new Scanner(System.in);            String str = scan.next();            if (str.equals("#")) {                num = i;                break;            }            a[i] = Integer.parseInt(str);        }        System.out.println("put in");    }    public void putOut() {        for (int i = 0; i < num; i++) {            for (int j = i; j < num; j++) {                if (a[i] > a[j]) {                    int t = a[i];                    a[i] = a[j];                    a[j] = t;                }            }            System.out.print(a[i] + " ");        }        System.out.println("put out");    }    public static void main(String args[]) {        ArraySort array = new ArraySort(5);        array.putIn();        array.putOut();    }}