where is the wrong i want to write recursive method prints all small letters

Question

public class JavaApplication61 {
public static void findSmallLetters(String s,int i)
{
if(i>= s.length())
{
System.exit(1);
}
else if (s.charAt(0)>='a' && s.charAt(0)<='z')
{
System.out.println(s.charAt(0));
findSmallLetters(s, i+1);
}
else
{
findSmallLetters(s, i+1);
}
}
public static void main(String[] args) {
String a = "kASfk + adsAfqwF";
findSmallLetters(a,0);
}

}

Answer 1

Try to change the else if part like this:

else if (s.charAt(i)>='a' && s.charAt(i)<='z')
{
System.out.println(s.charAt(i));
findSmallLetters(s, i+1);
}

It seems you forgot to use the i, and use zero instead.

Hth, cmiiw

Answer 2

@Ghiath Aletek tell me the error message, I tested it in Code Playground and it worked well. All the small case letters are printed out.

Answer 3

@Ghiath Aletek here's the code I tried on Code Playground:

public class JavaApplication61 {
public static void findSmallLetters(String s,int i)
{
if(i>= s.length())
{
System.exit(1);
}
else if (s.charAt(i)>='a' && s.charAt(i)<='z')
{
System.out.println(s.charAt(i));
findSmallLetters(s, i+1);
}
else
{
findSmallLetters(s, i+1);
}
}
public static void main(String[] args) {
String a = "kASfk + adsAfqwF";
findSmallLetters(a,0);
}
}

Answer 4

Does it work?

Answer 5

Okay, good to hear, see you later mate.

Answer 6

it worked but with errors

Answer 7

C:\NetBeans\Cache\8.2\executor-snippets\run.xml:53: Java returned: 1 Build failed

Answer 8

Thank you

Answer 9

just change System.exit (0);
make it zero