public class RemoveInstance {

public static void main(String args[]) {

// Given String

String inputString = "javaprogram";

System.out.println("Input String is: "+ inputString );

// Given Character

char inputChar = 'a';

RemoveInstance RmvIns = new RemoveInstance();

// ItrString1 is the string that holds the manipulated String achieved through iteration.

String ItrString1 = RmvIns.iterate(inputString, inputChar);

System.out.println("1) Iterate through the String, one character at a time, Output is : " + ItrString1);

// resultString2 is the string that holds the manipulated String that can be solved this in one line .

String onelineString12 = RmvIns.builtInFusolveInOneLine(inputString, inputChar);

System.out.println("2) Find a method in the String class that can solve this in one line, Output is : " + onelineString12);

}

/** Start Method -- 1) Iterate through the String, one character at a time */

public String iterate(String inputString, Character inputChar) throws IllegalArgumentException {

// Check if input string is empty or NULL

if (inputString == null || inputString.isEmpty() || inputChar == null) {

throw new IllegalArgumentException();

}

// Get the size of the length

int strlen = inputString.length();

// Use String Builder to append string

StringBuilder outputStringBuilder = new StringBuilder();

// Iterate through the String, one character at a time

for (int i = 0; i < strlen; i++) {

/**

* if the character is not equal to the given character, add that

* character to the ItrString1

*/

char currentChar = inputString.charAt(i);

if (currentChar != inputChar) {

outputStringBuilder.append(currentChar);

}

}

return outputStringBuilder.toString();

}

// End of the Method - iterationMethod

/**

* Start Method--2. Find a method in the String class that can solve this in one line

*/

public String builtInFusolveInOneLine(String inputString, Character inputChar)

throws IllegalArgumentException {

// Checking if input string is empty or NULL

if (inputString == null || inputString.isEmpty() || inputChar == null) {

throw new IllegalArgumentException();

}

// replace method will replace the given character with null

String outputString = inputString.replaceAll(inputChar.toString(), "");

return outputString;

}

// End of the Method - builtInFunction

}