import org.testng.Assert;

public class StringProblem {

public static String removeCharacter(String s, char ch) {

StringBuilder sb = new StringBuilder();

for(char c:s.toCharArray()) {

if(ch!=c) {

sb.append(c);

}

}

return sb.toString();

}

public static String removeCharacter2(String s, char ch) {

return s.replaceAll(String.valueOf(ch), "");

}

public static void main(String args[]) {

Assert.assertEquals(removeCharacter("Apple", 'p'), "Ale");

Assert.assertEquals(removeCharacter("Apple", 'A'), "pple");

Assert.assertEquals(removeCharacter("Apple", 'e'), "Appl");

Assert.assertEquals(removeCharacter("Apple", 'P'), "Apple");

Assert.assertEquals(removeCharacter("Apple", ' '), "Apple");

Assert.assertEquals(removeCharacter("", ' '), "");

Assert.assertEquals(removeCharacter("Ap ple ", 'p'), "A le ");

Assert.assertEquals(removeCharacter("Apple16", '1'), "Apple6");

Assert.assertEquals(removeCharacter2("Apple", 'p'), "Ale");

Assert.assertEquals(removeCharacter2("Apple", 'A'), "pple");

Assert.assertEquals(removeCharacter2("Apple", 'e'), "Appl");

Assert.assertEquals(removeCharacter2("Apple", 'P'), "Apple");

Assert.assertEquals(removeCharacter2("Apple", ' '), "Apple");

Assert.assertEquals(removeCharacter2("", ' '), "");

Assert.assertEquals(removeCharacter2("Ap ple ", 'p'), "A le ");

Assert.assertEquals(removeCharacter2("Apple16", '1'), "Apple6");

}

}