Name: Janer, Jesson L.
Section: Set A
Time: TF(1:00-2:30)
Exercise: 1
Code:
public class exercise2{
public static void main (String[] args) {
String msg = "Hello World, This is a test ! :)";
string_classes.display_msg (5,msg);
System.out.println ("\nThe reverse string is: " +string_classes.reverse_msg (msg));
System.out.println ("\nThe no of vowels in a string is: " +string_classes.no_of_vowels (msg));
System.out.println ("\nThe no of consonants in a string is:" +string_classes.no_of_consonants(msg));
System.out.println ("\nThe no of special characters in a string is: " +string_classes.no_of_special_chars (msg));
System.out.println ("\nThe no of characters occurences: ");
string_classes.char_occurences (msg);
}
}
public class string_classes {
public static void display_msg(int x, String msg){
for(int i = 0; i < x ; i++){
System.out.println ("\n" +msg);
}
}
public static String reverse_msg(String msg){
String str_reverse = " ";
//Enter your solution here.....
str_reverse = new StringBuffer(msg).reverse().toString();
return str_reverse;
}
public static int no_of_vowels(String msg){
int nvowels = 0;
//Enter your solution here.....
String tester="aeiou";
for(int a=0;a<msg.length();a++){
for(int b=0;b<tester.length();b++){
if((msg.toLowerCase()).charAt(a)==(tester.charAt(b)))nvowels++;
}
}
return nvowels;
}
public static int no_of_consonants(String msg){
int nconsonants = 0;
//Enter your solution here.....
String tester="bcdfghjklmnpqrstvwxyz";
for(int a=0;a<msg.length();a++){
for(int b=0;b<tester.length();b++){
if((msg.toLowerCase()).charAt(a)==(tester.charAt(b)))nconsonants++;
}
}
return nconsonants;
}
public static int no_of_special_chars(String msg){
int sp_chars = 0;
//Enter your solution here.....
String tester="~`!@#$%^&*()-_+={}[];:',.></?|";
for(int a=0;a<msg.length();a++){
for(int b=0;b<tester.length();b++){
if((msg.toLowerCase()).charAt(a)==(tester.charAt(b)))sp_chars++;
}
}
return sp_chars;
}
public static void char_occurences(String msg){
//Enter your code here...
/* Sample output: Hello World, This is a test ! :
*H - 2, e - 2, l - 3, o - 2, W - 1, r - 1 d - 1,
*T - 3, i - 2, s - 3, a - 1
*
*/
String tester="abcdefghijklmnopqrstuvwxyz";
boolean t=true,th=true;
int no=0;
String char_passed=" ";
System.out.println(msg);
for(int a=0;a<msg.length();a++){
for(int b=0;b<tester.length();b++){
if(msg.toLowerCase().charAt(a)==tester.charAt(b)){
t=true;
b=27;
}else{
t=false;
}
}
if(t==true){
for(int c=0;c<msg.length();c++){
if(msg.toLowerCase().charAt(a)==msg.toLowerCase().charAt(c))no++;
}
for(int d=0;d<char_passed.length();d++){
if(msg.toLowerCase().charAt(a)==char_passed.charAt(d)){
th=false;
d=100;
}
}
if(th==true){
System.out.println(msg.charAt(a)+ "-"+no);
char_passed=char_passed+msg.toLowerCase().charAt(a);
}
}
t=true;
th=true;
no=0;
}
}
}
