I have to solve this question in the below but I don\'t know what is wrong with
ID: 3937027 • Letter: I
Question
I have to solve this question in the below but I don't know what is wrong with my code. Please scroll down so you can see my code.
Q. Run-length encoding (RLE) is a simple "compression algorithm" (an algorithm which takes a block of data and reduces its size, producing a block that contains the same information in less space). It works by replacing repetitive sequences of identical data items with short "tokens" that represent entire sequences. Applying RLE to a string involves finding sequences in the string where the same character repeats. Each such sequence should be replaced by a "token" consisting of:
1. the number of characters in the sequence
2. the repeating character
If a character does not repeat, it should be left alone.
For example, consider the following string:
In the compressed string, "9w" represents a sequence of 9 consecutive lowercase "w" characters. "5e" represents 5 consecutive lowercase "e" characters, etc.
Write a method called compress that takes a string as input, compresses it using RLE, and returns the compressed string. Case matters - uppercase and lowercase characters should be considered distinct. You may assume that there are no digit characters in the input string. There are no other restrictions on the input - it may contain spaces or punctuation. There is no need to treat non-letter characters any differently from letters.
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< MY CODE >
public class Compress{
public static String compress (String original) {
int count = 1;
String stringcp = "";
for (int i =0; i<original.length(); i++) {
char a = original.charAt(i);
while ( original.charAt(i) == original.charAt(i+1) && (i+1)<original.length() ) {
count++;
i ++;
if (count >1) {
stringcp = stringcp + String.valueOf(count) +String.valueOf(a);
} else {
stringcp = stringcp + String.valueOf(a); }
} } return stringcp;
}
public static void main(String[] args) {
System.out.print("Enter the string: ");
String original = IO.readString();
IO.outputStringAnswer (compress(original));
} }
Explanation / Answer
public class Compress1
{
public static void main(String[] args)
{
System.out.println("Enter a string");
String input = IO.readString();
if (input == null || input.length() == 0)
{
System.out.println("null or empty string input");
System.exit(0);
}
if (input.length() == 1)
{
System.out.println(String.valueOf(curr));
System.exit(0);
}
input += " ";
char curr = input.charAt(0);
int count=1;
for (int i=1; i < input.length(); ++i)
{
char next = input.charAt(i);
if (curr != next)
{
if (count > 1)
{
System.out.print(count + String.valueOf(curr));
}
else
{
System.out.print(curr);
}
count = 1;
}
else
{
++count;
}
curr = next;
}
}
}