我对编程很新,我想知道如何编码/解码输入的文本。
所有字母必须放下3个字母以表示前A - > d B - > Ë 等等
我输入一些伪代码作为例子:
输入消息:" LORYHBRX"
编码消息:LORYHBRX
解码消息:ILOVEYOU
输出信息:" ILOVEYOU"
请帮忙。
到目前为止我已经
了import java.util.*;
public class Encoder {
public static void main(String[] args)
{
String a = "d";
String b = "e";
String c = "f";
String d = "g";
String e = "h";
String f = "i";
String g = "j";
String h = "k";
String i = "l";
String j = "m";
String k = "n";
String l = "o";
String m = "p";
String n = "q";
String o = "r";
String p = "s";
String q = "t";
String r = "u";
String s = "v";
String t = "w";
String u = "x";
String v = "y";
String w = "z";
String x = "a";
String y = "b";
String z = "c";
Scanner in = new Scanner(System.in);
System.out.println("Please enter the text you wish to encode.");
String place = in.nextLine();
System.out.println(place);
}
}
我试图将输入的内容转换为上述变量。
我认为我将所有这些字符串说明为变量,但我不知道如何通过输入使它们可以更改。
答案 0 :(得分:1)
我会给你一些提示,如何进行解码和编码将只是相反的过程。
首先,您应该知道计算机只能理解调用Ascii code
的数字。
Ascii代码是b
,&
,A
等字符的数字表示形式,因此,大写字母和小写字母为{{ 1}}这是int类型。
您应该知道的另一个主题是Ascii code
强制转换正在将类型转换为另一种类型,例如将int转换为char或反之亦然,但是您应该知道某些类型的转换无法转换为类型boolean to int这样的另一种类型,这是不可能的。< / p>
让我们谈谈编码并让解码给你解决,因为它与编码相反。
有关编码方式的提示
Casting
; 由于你了解了作为数字的Ascci代码,你可以通过转换来循环到97到122以获得小字符。
示例:
String a = "a"
输出:
System.out.println("Asci code of small a is " + (int)'a' + "\nsmall a is " + (char)97);
注意:您将char转换为int并将int转换为char。
由于您正在处理数字,因此您可以进行添加。
示例:
Asci code of small a is 97
small a is a
输出继电器:
System.out.println("Three char after a is " + (char)(97+3));
对于char x,y和z,你可以从他们的asci代码中减去23,例如there char after a is d
将给a的asci代码。
答案 1 :(得分:0)
完整的编码和解码代码
import java.util.Scanner;
public class coder {
public static void main(String[] args) {
String[] qe = {"1 ","2 ","3 ","4 ","5 ","6 ","7 ","8 ","9 ","10 ","11 ","12 ","13 ",
"14 ","15 ","16 ","17 ","18 ","19 ","20 ","21 ","22 ","23 ","24 ","25 ","26 "};
String [] eq = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o",
"p","q","r","s","t","u","v","w","x","y","z"};
Scanner in = new Scanner(System.in);
System.out.println("Please enter the text you wish to encode.");
String place = in.nextLine();
place = place.toLowerCase();
place = place.replace("a", qe[0]);
place = place.replace("b", qe[1]);
place = place.replace("c", qe[2]);
place = place.replace("d", qe[3]);
place = place.replace("e", qe[4]);
place = place.replace("f", qe[5]);
place = place.replace("g", qe[6]);
place = place.replace("h", qe[7]);
place = place.replace("i", qe[8]);
place = place.replace("j", qe[9]);
place = place.replace("k", qe[10]);
place = place.replace("l", qe[11]);
place = place.replace("m", qe[12]);
place = place.replace("n", qe[13]);
place = place.replace("o", qe[14]);
place = place.replace("p", qe[15]);
place = place.replace("q", qe[16]);
place = place.replace("r", qe[17]);
place = place.replace("s", qe[18]);
place = place.replace("t", qe[19]);
place = place.replace("u", qe[20]);
place = place.replace("v", qe[21]);
place = place.replace("w", qe[22]);
place = place.replace("x", qe[23]);
place = place.replace("y", qe[24]);
place = place.replace("z", qe[25]);
System.out.println(place);
place = place.replace("26 ", eq[25]);
place = place.replace("25 ", eq[24]);
place = place.replace("24 ", eq[23]);
place = place.replace("23 ", eq[22]);
place = place.replace("22 ", eq[21]);
place = place.replace("21 ", eq[20]);
place = place.replace("20 ", eq[19]);
place = place.replace("19 ", eq[18]);
place = place.replace("18 ", eq[17]);
place = place.replace("17 ", eq[16]);
place = place.replace("16 ", eq[15]);
place = place.replace("15 ", eq[14]);
place = place.replace("14 ", eq[13]);
place = place.replace("13 ", eq[12]);
place = place.replace("12 ", eq[11]);
place = place.replace("11 ", eq[10]);
place = place.replace("10 ", eq[9]);
place = place.replace("9 ", eq[8]);
place = place.replace("8 ", eq[7]);
place = place.replace("7 ", eq[6]);
place = place.replace("6 ", eq[5]);
place = place.replace("5 ", eq[4]);
place = place.replace("4 ", eq[3]);
place = place.replace("3 ", eq[2]);
place = place.replace("2 ", eq[1]);
place = place.replace("1 ", eq[0]);
System.out.println(place);
}
}