I don't know why this is fiving me an error, can someone please help

Question

1.00/5 (1 vote)

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MyProgram.java:43: error: illegal start of expression
public static boolean isVowel(char letter)
^
MyProgram.java:43: error: illegal start of expression
public static boolean isVowel(char letter)
^
MyProgram.java:43: error: ';' expected
public static boolean isVowel(char letter)
^
MyProgram.java:43: error: '.class' expected
public static boolean isVowel(char letter)
^
MyProgram.java:43: error: ';' expected
public static boolean isVowel(char letter)
^
MyProgram.java:55: error: illegal start of expression
public static int numVowels(String s)
^
MyProgram.java:55: error: illegal start of expression
public static int numVowels(String s)
^
MyProgram.java:55: error: ';' expected
public static int numVowels(String s)
^
MyProgram.java:55: error: ')' expected
public static int numVowels(String s)
^
MyProgram.java:55: error: illegal start of expression
public static int numVowels(String s)
^
MyProgram.java:55: error: ';' expected
public static int numVowels(String s)
^
11 errors

What I have tried:

Java

public class MyProgram
{
    public static void main(String[] args)

    {
        System.out.println("Problem 1: " + isLetterA('a'));
        System.out.println("Problem 2: " + hasTwoA("computer"));
        System.out.println("Problem 3: " + isVowel('e'));
        System.out.println("Problem 4: " + numVowels("computers"));
        System.out.println("Problem 5: " + evenChars("computerScience", 'e', 's'));
        System.out.println("Problem 6: " + twoInARow("book", 'o'));
        System.out.println("Problem 7: " + capitalizeVowels("hello"));
        System.out.println("Problem 8: " + longestWord("hello how are you "));
        System.out.println("Problem 9: " + containsPrefix("abXYabc", 2));
    }//end main
    //1
    public static boolean isLetterA(char letter)
    {
        return letter == 'a';
    }//end 1
   
    //2 - change n do using char array
    public static boolean hasTwoA (String s)
    {
    {
        int twoA = 0;
        boolean hasA = false;
        for (int i = 0; i < s.length(); i++)
        {
            if ((s.charAt(i)) == ('a'))
            {
                twoA++;
                if (twoA == 2)
                {
                    hasA = true;  
                }
            }
        }
        return hasA;
    }//end 2
   
    //3
    public static boolean isVowel(char letter)
    {
     {  {
          if (letter == ('a') || letter == ('e') || letter == ('i') || letter == ('o') || letter == ('u') || letter == ('A') || letter == ('E') || letter == ('I') || letter == ('O') || letter == ('U'))
          {
            return true;
          }
        return false;
        }//end 3
    }
    }
    //4
    public static int numVowels(String s)
    {
      char[] chars = s.toCharArray();
        int numOfVowels = 0;
        for (int i = 0; i < chars.length; i++)
        {
            if (isVowel(chars[i]) == true)
            {
                numOfVowels++;
            }
        }
        return numOfVowels;
    }//end 4

Posted 11-May-21 6:41am

Krisha Nashte

Updated 11-May-21 7:40am

Richard MacCutchan

v2

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Comments

CHill60 11-May-21 12:59pm

This is the very same problem as your other question Can someone help this is giving me an error, and idk why[^]
And you accepted that solution!

4 solutions

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Richard MacCutchan · Accepted Answer · 2021-05-11T06:52:00

Solution 1

Look at your code:

Java

//2 - change n do using char array
public static boolean hasTwoA (String s)
{
{ // what is this second open brace for?

Posted 11-May-21 6:52am

Richard MacCutchan

CHill60 · Accepted Answer · 2021-05-11T06:56:00

Solution 2

Your braces do not match up. E.g.

Java

public static boolean hasTwoA (String s)
{
{

Why two {? There is no matching } for one of them. Also true of

Java

public static boolean isVowel(char letter)
{
{

Posted 11-May-21 6:56am

CHill60

v2

Dave Kreskowiak · Accepted Answer · 2021-05-11T07:03:00

Clean up all the curly braces. You should never have multiple opening braces right next to each other with no other text between them, and you've done that in multiple places. You also have to clean up mismatched closing braces as well.

Properly format your code. It makes it much easier to debug.

Java

public class MyProgram
{
    public static void main(String[] args)
    {
        System.out.println("Problem 1: " + isLetterA('a'));
        System.out.println("Problem 2: " + hasTwoA("computer"));
        System.out.println("Problem 3: " + isVowel('e'));
        System.out.println("Problem 4: " + numVowels("computers"));
        System.out.println("Problem 5: " + evenChars("computerScience", 'e', 's'));
        System.out.println("Problem 6: " + twoInARow("book", 'o'));
        System.out.println("Problem 7: " + capitalizeVowels("hello"));
        System.out.println("Problem 8: " + longestWord("hello how are you "));
        System.out.println("Problem 9: " + containsPrefix("abXYabc", 2));
    }//end main

    //1
    public static boolean isLetterA(char letter)
    {
        return letter == 'a';
    }//end 1
   
    //2 - change n do using char array
    public static boolean hasTwoA(String s)
    {
        int twoA = 0;
        boolean hasA = false;

        for (int i = 0; i < s.length(); i++)
        {
            if (s.charAt(i) == 'a')
            {
                twoA++;
                if (twoA == 2)
                {
                    hasA = true;  
                }
            }
        }

        return hasA;
    }//end 2
   
    //3
    public static boolean isVowel(char letter)
    {
        if (letter == ('a') || 
            letter == ('e') ||
            letter == ('i') || 
            letter == ('o') || 
            letter == ('u') || 
            letter == ('A') || 
            letter == ('E') || 
            letter == ('I') || 
            letter == ('O') || 
            letter == ('U') )
        {
            return true;
        }

        return false;
    }//end 3

    //4
    public static int numVowels(String s)
    {
        char[] chars = s.toCharArray();
        int numOfVowels = 0;
        for (int i = 0; i < chars.length; i++)
        {
            if (isVowel(chars[i]) == true)
            {
                numOfVowels++;
            }
        }

        return numOfVowels;
    }//end 4
}

Patrice T · Accepted Answer · 2021-05-11T07:40:00

Java

//2 - change n do using char array
public static boolean hasTwoA (String s)
{
    { // either this '{' should be removed
        int twoA = 0;
        boolean hasA = false;
        for (int i = 0; i < s.length(); i++)
        {
            if ((s.charAt(i)) == ('a'))
            {
                twoA++;
                if (twoA == 2)
                {
                    hasA = true;
                }
            }
        }
        return hasA;
    }//end 2
    // either there is 1 missing here

Advice: Learn to indent properly your code, it show its structure and it helps reading and understanding. It also helps spotting structures mistakes.

C++

public class MyProgram
{
	public static void main(String[] args)

	{
		System.out.println("Problem 1: " + isLetterA('a'));
		System.out.println("Problem 2: " + hasTwoA("computer"));
		System.out.println("Problem 3: " + isVowel('e'));
		System.out.println("Problem 4: " + numVowels("computers"));
		System.out.println("Problem 5: " + evenChars("computerScience", 'e', 's'));
		System.out.println("Problem 6: " + twoInARow("book", 'o'));
		System.out.println("Problem 7: " + capitalizeVowels("hello"));
		System.out.println("Problem 8: " + longestWord("hello how are you "));
		System.out.println("Problem 9: " + containsPrefix("abXYabc", 2));
	}//end main
	//1
	public static boolean isLetterA(char letter)
	{
		return letter == 'a';
	}//end 1

	//2 - change n do using char array
	public static boolean hasTwoA (String s)
	{
		{
			int twoA = 0;
			boolean hasA = false;
			for (int i = 0; i < s.length(); i++)
			{
				if ((s.charAt(i)) == ('a'))
				{
					twoA++;
					if (twoA == 2)
					{
						hasA = true;
					}
				}
			}
			return hasA;
		}//end 2

		//3
		public static boolean isVowel(char letter)
		{
			{  {
				if (letter == ('a') || letter == ('e') || letter == ('i') || letter == ('o') || letter == ('u') || letter == ('A') || letter == ('E') || letter == ('I') || letter == ('O') || letter == ('U'))
				{
					return true;
				}
				return false;
			}//end 3
		}
	}
	//4
	public static int numVowels(String s)
	{
		char[] chars = s.toCharArray();
		int numOfVowels = 0;
		for (int i = 0; i < chars.length; i++)
		{
			if (isVowel(chars[i]) == true)
			{
				numOfVowels++;
			}
		}
		return numOfVowels;
	}//end 4

Indentation style - Wikipedia[^]

Professional programmer's editors have this feature and others ones such as parenthesis matching and syntax highlighting.
Notepad++ Home[^]
ultraedit[^]
Enabling Open Innovation & Collaboration | The Eclipse Foundation[^]

I don't know why this is fiving me an error, can someone please help

4 solutions

Solution 1

Solution 2

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