/**

Define a Java class to solve this problem:

Given a String and a Character, remove all instances of the Character in the String

Solve this two ways:

1. Iterate through the String, one character at a time

2. Find a method in the String class that can solve this in one line

Write methods for each solution.

Afterwards, write a TestNG or JUnit class for each solution which tests these methods.

Include both positive and negative cases for validations.

*/

/**

* @author Vlad

*

*/

public class RemoveCharFromString {

public static String str = "Apple interview";

public static char ch = 'p';

public String RemCharMethod1(String s, char c) {

if (s == null)

return null;

String res = "";

char[] chstr = s.toCharArray();

for (char celem : chstr) {

if (celem != c)

res += celem;

}

return res;

}

public String RemCharMethod2(String s, char c) {

if (s == null)

return null;

String res = "";

res = s.replace(String.valueOf(c), "");

return res;

}

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

if (args.length < 2)

System.out.println("Using default params");

else {

str = args[0];

ch = args[1].charAt(0);

}

System.out.println("Original string = " + str);

RemoveCharFromString rcfs = new RemoveCharFromString();

System.out.println("Result for method 1 = " + rcfs.RemCharMethod1(str, ch));

System.out.println("Result for method 2 = " + rcfs.RemCharMethod2(str, ch));

}

}