WEEK 1-Word Play

1. # Write a method isVowel that has one Char parameter named ch.
# This method returns true if ch is a vowel (one of 'a', 'e', 'i', 'o', or 'u' or the uppercase versions) and false otherwise. 
# You should write a tester method to see if this method works correctly. 

public class WordPlay {
  public boolean isVowel(char ch){
      ch=Character.toLowerCase(ch);
    if (ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')
    return true;
    else
    return false;
    }

public void testisVowel(){

char ch='o';
boolean result=isVowel(ch);
System.out.println(result);

}}

2.

# Write a method replaceVowels that has two parameters, a String named phrase and a Char named ch.
# This method should return a String that is the string phrase with all the vowels (uppercase or lowercase) replaced by ch. 
# Be sure to call the method isVowel that you wrote and also test this method.

public String replaceVowels(String phrase, char ch){
String a="";

for (int i=0; i<phrase.length(); i++){
if (isVowel(phrase.charAt(i))==true)

a=a+""+ch;
else
a=a+phrase.charAt(i);

}
return a;
}
public void testReplaceVowels(){
String a="sehytkziuewq";
char ch='*';
String b=replaceVowels(a,ch);
System.out.println(b);

}

3.

# Write a method emphasize with two parameters, a String named phrase and a character named ch. 
# This method should return a String that is the string phrase but with the Char ch (upper- or lowercase) replaced by
# ‘*’ if it is in an odd number location in the string (first character has index 0, third character has index 2, etc.), 
# or ‘+’ if it is in an even number location in the string (second character has index 1, fourth character has index 3, etc.).



   public String emphasize(String phrase, char ch){
    phrase=phrase.toLowerCase();
    String a="";
    for(int i=0;i<phrase.length(); i++){
    if (phrase.charAt(i)!=ch)
    a=a+phrase.charAt(i);
    else if(phrase.charAt(i)==ch){
    if(i%2==0)
    a=a+'*';
    if(i%2!=0)
    a=a+'+';
    }
}
  return a;  
}    


public void testEmphasize(){
String a="sehytkziuewq";
char ch='e';
String b=emphasize(a,ch);
System.out.println(b);

}