First letter to be uppercase and if Name line is empty print out "can't be empty"

Question

System.out.println("Ange följande:");

    System.out.print("Name: ");
    String firstName = keyboard.nextLine();
    firstName = firstName.substring(0,1).toUpperCase() + firstName.substring(1).toLowerCase();

    while (firstName.equals("")) {
        System.out.println("Name line can't be empty!!");
        System.out.print("Name: ");
        firstName = keyboard.nextLine();
    }

You did not say what the problem is here. – MalaKa Dec 09 '16 at 11:44 — MalaKa, Dec 09 '16 at 11:44
probably the indexoutofbounds – XtremeBaumer Dec 09 '16 at 11:45 — XtremeBaumer, Dec 09 '16 at 11:45
Please describe your problem. – ir-tech Dec 09 '16 at 11:49 — ir-tech, Dec 09 '16 at 11:49

score 0 · Accepted Answer · answered Dec 09 '16 at 11:47

    System.out.print("Name: ");
    String firstName = keyboard.nextLine();

    while (firstName.trim().equals("")) {
        System.out.println("Name line can't be empty!!");
        System.out.print("Name: ");
        firstName = keyboard.nextLine();
    }
    firstName = firstName.substring(0, 1).toUpperCase() + firstName.substring(1).toLowerCase();
    System.out.println(firstName);

move the line where you make the first letter upper case after the while and also use trim() in your while statement to make sure there are not just space entered

Thanks! Works just perfectly! – Marcus Dec 09 '16 at 12:10 — Marcus, Dec 09 '16 at 12:10

score 0 · Answer 2 · answered Dec 09 '16 at 11:48

You can put any string instead of Abcd in the below code -

public static void main(String[] args) throws ParseException {
    String check = "Abcd";
    if(check.isEmpty()){
        System.out.println("can't be empty...");
        System.exit(0);
    }
    char charAt = check.charAt(0);
    if(Character.isUpperCase(charAt)){
        //do stuff condition satisfied
    }
}

First letter to be uppercase and if Name line is empty print out "can't be empty"

2 Answers2