Java string capitalize testing

Im inputting  a users name as 2 strings first name last name  and I want to test if the first letter of their first name and last name  is capitalize and only the first letter if not it needs to print an error message for the user to correct the problem.
humberssAsked:
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mohguptaConnect With a Mentor Commented:
you can also try this
String firstname ="Abc";
String lastname = "Xyz";
char ch= firstname.charAt(0);
if(! Character.isUpperCase(ch)){
System.out.println("Please enter first letter of firstname in uppercase");
}
ch=lastname.charAt(0);
if(! Character.isUpperCase(ch)){
System.out.println("Please enter first letter of lastname in uppercase");
}

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objectsCommented:
You can use the split() method to break up first and last name

String[] names = input.split(" ");

you can use the Character class and the String charAt() method to check

char c first = names[0].charAt(0);
if (Character.isLowerCase(first))
{
   // first character is lower case


do the same for the 2nd name

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WeetbixironCommented:
It sounds to me like you are storing their first and last name seperately, so it would be more like this:

if( Character.isLowerCase(firstName.charAt(0)) )
{
       //Print error
}
else
{
      if( Character.isLowerCase( lastName.charAt(0) )
     {
             //print error
     }
}
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hazgodukCommented:
Some names have caps that aren't the first letter, but if you want to force it you could do the first bit of code.

If you just want to check use a Pattern and Match
        firstName = firstName.substring(0,1).toUpperCase() + firstName.substring(1).toLowerCase();
 
 
 
 
        Matcher m = Pattern.compile("^[A-Z]+[a-z]*$").matcher(firstName);
        if(m.matches())
        {
            System.out.println("valid");
        }
        else
        {
            System.out.println("invalid");
        }

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