其实我只是为了好玩而制作这个节目。它包括编码器和解码器。编码器的工作原理如下：
解码器以相反的方式工作。它从用户获取这些代码，它以点和空格的形式出现，并打印相应的字符串。由于我正在处理的字符的ASCII值范围从32（空格）到126（〜），因此二进制等效项的最大长度可以是7.因此，如果二进制等效项的长度小于7，则编码器将在二进制等效之前自动添加所需的零数量，使长度为7，这样解码器就可以轻松解码。解码器适用于小句子的代码。但是当我尝试输入一个长句子的代码（比如我正在写的那个）时，它在Bluej中不接受但在命令提示符中接受它;任何人都可以告诉我为什么会这样。大家请在命令提示符或任何你使用的程序上尝试这个程序。请提出任何建议以改进我的计划并使代码更复杂。
这是代码：
import java.io.*;
class ed2 {
BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));
void encode() throws InterruptedException, IOException {
String rs, ren;
encoder_symbol();
rs = encode_input();
ren = encode_find(rs);
encode_display(ren);
}
void decode() throws InterruptedException, IOException {
String rs, rde;
decoder_symbol();
rs = decode_input();
rde = decode_find(rs);
decode_display(rde);
}
void encoder_symbol() throws InterruptedException // just for fun
{
System.out.println("******** *** *** ********* ************ ****** ******** *****");
Thread.sleep(100);
System.out.println("******** **** *** ********* ************ ******** ******** *** **");
Thread.sleep(100);
System.out.println("*** ***** *** *** *** *** *** *** *** *** **");
Thread.sleep(100);
System.out.println("*** *** ** *** *** *** *** *** *** *** *** **");
Thread.sleep(100);
System.out.println("****** *** ** *** *** *** *** *** *** ****** *****");
Thread.sleep(100);
System.out.println("****** *** ** *** *** *** *** *** *** ****** *****");
Thread.sleep(100);
System.out.println("*** *** ** *** *** *** *** *** *** *** *** **");
Thread.sleep(100);
System.out.println("*** *** ** *** *** *** *** *** *** *** *** **");
Thread.sleep(100);
System.out.println("******* *** ***** ********* ************ ******** ******** *** **");
Thread.sleep(100);
System.out.println("******* *** **** ********* ************ ****** ******** *** **");
Thread.sleep(2700);
System.out.println();
System.out.println();
}
void decoder_symbol() throws InterruptedException // just for fun
{
System.out.println("****** ******** ********* ************ ****** ******** *****");
Thread.sleep(100);
System.out.println("******** ******** ********* ************ ******** ******** *** **");
Thread.sleep(100);
System.out.println("*** *** *** *** *** *** *** *** *** *** **");
Thread.sleep(100);
System.out.println("*** *** *** *** *** *** *** *** *** *** **");
Thread.sleep(100);
System.out.println("*** *** ****** *** *** *** *** *** ****** *****");
Thread.sleep(100);
System.out.println("*** *** ****** *** *** *** *** *** ****** *****");
Thread.sleep(100);
System.out.println("*** *** *** *** *** *** *** *** *** *** **");
Thread.sleep(100);
System.out.println("*** *** *** *** *** *** *** *** *** *** **");
Thread.sleep(100);
System.out.println("******** ******** ********* ************ ******** ******** *** **");
Thread.sleep(100);
System.out.println("****** ******** ********* ************ ****** ******** *** **");
Thread.sleep(1000);
System.out.println();
System.out.println();
}
String encode_input() throws IOException {
String s;
System.out.println("ENTER THE STRING TO BE ENCODED");
s = obj.readLine();
return (s);
}
String decode_input() throws IOException {
String s;
System.out.println("ENTER THE CODE TO BE DECODED");
s = obj.readLine();
return (s);
}
String encode_find(String s)// converting the string into its binary
// equivalent
{
int ac, i, j, l, chklen;
String bc, en = "";
char ic;
l = s.length();
for (i = 0; i < l; i++) {
ic = s.charAt(i); // takes out every character
bc = "";
ac = (int) ic; // ASCII value of this character
while (ac != 0) {
bc = Integer.toString((ac % 2)) + bc; // converting the ASCII
// value into binary
// equivalent
ac = ac / 2;
}
chklen = bc.length();// length of the binary equivalent
if (chklen < 7) {
for (j = 1; j <= (7 - chklen); j++) // increasing the length of
// binary equivalent so that
// it becomes equal to 7
{
bc = "0" + bc;
}
}
en = en + bc; // concatenating all the binary equivalent into one
// string
}
return (en);
}
String decode_find(String s)// converts binary(i.e. in the form of dots and
// space) to decimal
{
int f;// for the index of every character of code
long l, i, j, ac;
char c;
String de = "";
l = s.length();
f = 0;// index of first caharcter
for (i = 0; i < (l / 7); i++)// since the length of every binary
// equivalent of a character is 7 therefore
// there will be (length/7) characters in a
// code of length l
{
ac = 0;// intializes the decimal(ASCII) equivalent to zero
for (j = 6; j >= 0; j--)// loop will work 7 times for every binary
// equivalent of a character
{
c = s.charAt(f);// takes out every dot or space
if (c == '.')// it means that c corresponds to 'one'
{
ac = ac + ((int) Math.pow(2, j));// converting binary into
// decimal(ASCII)
// equivalent by adding all
// the powers of 2 which
// correspond to one('.')
}
f++;// increasing the index for next character of binary
// equivalent
}
de = de + ((char) ac);// converts the ASCII equivalent into
// character and then concatenates it with the
// intitial string
}
return (de);
}
void encode_display(String en)// displays the code
{
int i, l;
char ic;
System.out.println("YOUR ENCODED MESSAGE IS :");
l = en.length();
for (i = 0; i < l; i++) {
ic = en.charAt(i);
if (ic == '1')// for every 'one' it will print '.'(dot)
{
System.out.print(".");
} else if (ic == '0')// for every 'zero' it will print ' '(space)
{
System.out.print(" ");
}
}
}
void decode_display(String de) {
System.out.println(de);
}
public static void main(String args[]) throws IOException, InterruptedException {
BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));
char ch;
ed2 ed = new ed2();
System.out.println("PRESS 'E' TO ENCODE A MESSAGE OR PRESS 'D' TO DECODE A MESSAGE");
ch = (char) obj.read();
if ((ch == 'e') || (ch == 'E')) {
ed.encode();
} else if ((ch == 'd') || (ch == 'D')) {
ed.decode();
}
}
}