java Syntax error on token "(", ; expected

Question

/*help me to correct this error*/

import javax.swing.JOptionPane;

public class Assignment1
{

    public static void main(String args[])
    {
        String input = JOptionPane.showInputDialog("Enter a string");
        if (istPalindrome(input))
        {
            JOptionPane.showMessageDialog(null,input+"is a palindrome");
        }
        else{
            JOptionPane.showMessageDialog(null ,input +"is not a palindrome");
        }

        public static boolean istPalindrome(String a)/*error is here*/
        {
            char[] charArray = word.toCharArray();
            int i1 = 0;
            int i2 = word.length() - 1;

            while (i2 > i1) {
                if (charArray[i1] != charArray[i2]) {
                    return false;
                }

                ++i1;
                --i2;
            }
            return true;
        }
    }
}

correct you indentation first, then the error should be obvious (the istPalindrome is defined inside the main function) — ratchet freak
– ratchet freak, Commented Feb 27, 2014 at 12:15

Matthew Champion · Accepted Answer · 2014-02-27 12:30:06Z

As stated by ratchet freak, you need to move the function out of main. The function itself belongs to the Assignment1 class and as such needs to be:

import javax.swing.JOptionPane;

public class Assignment1
{
    public static void main(String args[])
    {
        String input = JOptionPane.showInputDialog("Enter a string");
        if (istPalindrome(input))
        {
            JOptionPane.showMessageDialog(null,input+"is a palindrome");
        }
        else{
            JOptionPane.showMessageDialog(null ,input +"is not a palindrome");
        }
    }

    public static boolean istPalindrome(String a)/*error is here*/
    {
        char[] charArray = a.toCharArray();
        int i1 = 0;
        int i2 = a.length() - 1;

        while (i2 > i1) {
            if (charArray[i1] != charArray[i2]) {
                return false;
            }

            ++i1;
            --i2;
        }
        return true;
    }
}

I've also changed the variable "word" over to "a" (for the statements word.toCharArray() and word.length()) due to the fact that there is no "word" variable in scope within that function.

AnOldSoul · Accepted Answer · 2014-02-27 12:52:38Z

1

You cannot create another function like that inside main function. Move the function out of the main function scope and call wherever necessary

answered Feb 27, 2014 at 12:52

AnOldSoul

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