行转置密码

Question

我正在尝试编写一个程序来实现转置密码。当用户提供密钥“TAPE”和消息“HelloworldMessage”时，我的程序仅显示Hell，owor，ldMe和ssag并跳过最后一个“e “来自”消息，“这是错误的。输出应为：

Hell
owor
ldMe
ssag
exxx

和xxx应在加密前完成消息。我做错了什么？

import java.util.*;
import java.util.Scanner;  // needed for Scanner

public class transpositionCipher
{

public static void main(String args[]) 
{
String key;
String message;
String encryptedMessage; 
// Letters in the x-axis
int x=0; 
// Letters in the y-axis
int y=0; 


// Prompt the user
System.out.print( "Type your Key : " );


// Read a line of text from the user.

Scanner scan = new Scanner(System.in);
key = scan.nextLine();

// Display the input back to the user.
System.out.println( "Your Key is " + key );


//Prompt the user
System.out.print( "Type your Message : " );


//Read a line of text from the user.
message = scan.nextLine();

//Display the input back to the user.
System.out.println( "Your Message is " + message );



encryptedMessage = "";

// To set the temp as [x][y]
char temp[][]=new char [key.length()][message.length()];
char msg[] = message.toCharArray();
// To populate the array
x=0;
y=0;
// To convert the message into an array of char
for (int i=0; i< msg.length;i++)
{
temp[x][y]=msg[i];
if (x==(key.length()-1)) 
{
x=0;
y=y+1;
} // Close if 
else 
{
x++;
}
} // Close for loop

// To sort the key
char t[]=new char [key.length()];
t=key.toCharArray();
Arrays.sort(t);

for (int j=0;j<y;j++)
{
for (int i=0;i<key.length();i++)
{
System.out.print(temp[i][j]);
}
System.out.println();
}

System.out.println();

// To print out row by row (i.e. y)
for (int j=0;j<y;j++){ 
// To compare the the sorted Key with the key
// For char in the key
for (int i=0;i<key.length();i++){ 
int pos=0;
// To get the position of key.charAt(i) from sorted key
for (pos=0;pos<t.length;pos++){ 
if (key.charAt(i)==t[pos]){ 
// To break the for loop once the key is found
break;
}
}
System.out.print(temp[pos][j]);
encryptedMessage+=temp[pos][j];
}
System.out.println();
}

System.out.println(encryptedMessage);
System.exit(0);
}
}

输出

Type your Key : tape
Your Key is tape
Type your Message : HelloworldMessage
Your Message is HelloworldMessage
Hell
owor
ldMe
ssag

lHle
roow
elMd
gsas
lHleroowelMdgsas

Answer 1

最后我自己解决这个问题.....

import java.util.*;
import java.util.Scanner;  // needed for Scanner

public class transpositionCipher
{

public static void main(String args[]) 
{
String key;
String message;
String encryptedMessage; 
// Letters in the x-axis
int x=0; 
// Letters in the y-axis
int y=0; 


// Prompt the user
System.out.print( "Type your Key : " );


// Read a line of text from the user.

Scanner scan = new Scanner(System.in);
key = scan.nextLine();

// Display the input back to the user.
System.out.println( "Your Key is " + key );


//Prompt the user
System.out.print( "Type your Message : " );


//Read a line of text from the user.
message = scan.nextLine();

//Display the input back to the user.
System.out.println( "Your Message is " + message );


int msgchar = message.length();
int keycahr = key.length();

if (!((msgchar % keycahr) == 0)){

do{
message = message + "x";
msgchar = message.length();
}while(!((msgchar % keycahr) == 0));

}


encryptedMessage = "";

// To set the temp as [x][y]
char temp[][]=new char [key.length()][message.length()];
char msg[] = message.toCharArray();
// To populate the array
x=0;
y=0;
// To convert the message into an array of char
for (int i=0; i< msg.length;i++)
{
temp[x][y]=msg[i];
if (x==(key.length()-1)) 
{
x=0;
y=y+1;
} // Close if 
else 
{
x++;
}
} // Close for loop

// To sort the key
char t[]=new char [key.length()];
t=key.toCharArray();
Arrays.sort(t);

for (int j=0;j<y;j++)
{
for (int i=0;i<key.length();i++)
{
System.out.print(temp[i][j]);
}
System.out.println();
}

System.out.println();

// To print out row by row (i.e. y)
for (int j=0;j<y;j++){ 
// To compare the the sorted Key with the key
// For char in the key
for (int i=0;i<key.length();i++){ 
int pos=0;
// To get the position of key.charAt(i) from sorted key
for (pos=0;pos<t.length;pos++){ 
if (key.charAt(i)==t[pos]){ 
// To break the for loop once the key is found
break;
}
}
System.out.print(temp[pos][j]);
encryptedMessage+=temp[pos][j];
}
System.out.println();
}

System.out.println(encryptedMessage);
System.exit(0);
}
}