求助!一道关于I/O的问题

Question

要求:在不使用容器的前提下,在命令行上输入一排阿拉伯数字,然后把这些数字转换为汉字,如:输入"2003",转化为"二零零三"
下面是小弟自己写的代码,但得不到预想结果:
import java.io.*;
public class Test{
public static void main(String[]args) throws IOException{
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
String s=in.readLine();             //读取输入并将其转化为一个String
char[]a=s.toCharArray();            //将String转换为一个char型的array
        String[]b=new String[]{"零","一","二","三","四","五","六","七","八","九"};
for(int i=0;i<s.length();i++){                                //判断a中元素的值并将值作下标赋给b数组
if(a[i]==0)System.out.print(b[0]);
if(a[i]==1)System.out.print(b[1]);
if(a[i]==2)System.out.print(b[2]);
if(a[i]==3)System.out.print(b[3]);
if(a[i]==4)System.out.print(b[4]);
if(a[i]==5)System.out.print(b[5]);
if(a[i]==6)System.out.print(b[6]);
if(a[i]==7)System.out.print(b[7]);
if(a[i]==8)System.out.print(b[8]);
if(a[i]==9)System.out.print(b[9]);
}
}
}
编译,运行都能通过,就是得不到预想结果
请各位大虾帮助,小弟感激不尽  

Answer 1

if(a[i]=='0')System.out.print(b[0]);
if(a[i]=='1')System.out.print(b[1]);
if(a[i]=='2')System.out.print(b[2]);
if(a[i]=='3')System.out.print(b[3]);
if(a[i]=='4')System.out.print(b[4]);
if(a[i]=='5')System.out.print(b[5]);
if(a[i]=='6')System.out.print(b[6]);
if(a[i]=='7')System.out.print(b[7]);
if(a[i]=='8')System.out.print(b[8]);
if(a[i]=='9')System.out.print(b[9]);
这样就好了

Answer 2

public class  Test
{
public static void main(String[] args) throws Exception
{
while(true){
java.io.BufferedReader in=new java.io.BufferedReader(new java.io.InputStreamReader(System.in));
String s=in.readLine();
if(s.equals("exit"))
System.exit(0);
System.out.println("输入的内容为: "+s);
char[] a=s.toCharArray();
String[] b=new String[]{"零","一","二","三","四","五","六","七","八","九"};
StringBuffer sb=new StringBuffer();
for(int i=0;i<s.length();i++)
{
sb.append(b[Integer.parseInt(Character.toString(a[i]))]);
}
System.out.println("转换: "+sb.toString());
}
}
}

Answer 3

谢谢大家的帮助,自己以前对"=="和equals的用法比较糊涂,现在终于明白了.感激不尽

Answer 4

从char数组中取出的数据是'0','1','2'的形式,而不是0,1,2