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Thread: Displaying an hourglass 2

  1. #1
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    Default Displaying an hourglass 2

    Hello,

    I am working on the same code to produce the Hour Glass figure.

    My code is a little bit different because I am using a CONSTANT to change the size of the Hour Glass. I have my CONSTANT set to 4. The problem I am having is in my method for the BOTTOM HALF.
    I am getting an error message that says this.
    HourGlass.java:56: error: class, interface, or enum expected
    	public static void drawBottomHalf()
    What I don't understand is that to me it look like the same as the Top Half but with reverse order so I don't understand why I am getting this error.

    Here is my code.
    public class HourGlass
    {
    	public static final int HEIGHT = 4;
     
    	public static void main(String[] args)
    	{
    		drawTop();
    		drawTopHalf();
    		drawVertical();
    		drawBottomHalf();
    		drawTop();
    	}
     
    	// Produces the top part of the hour glass
    	public static void drawTop()
    	{
    		System.out.print("|");
    		for (int i = 1; 1 <= (2 * HEIGHT + 1); i++)
    		{
    			System.out.print("\"");
    		}
    		System.out.println("|");
    	}
     
    	// Produces the top half of the hour glass
    	public static void drawTopHalf()
    	{
    		for (int line = 1; line <= HEIGHT; line++)
    		{
    			for (int i = 1; i <= (line-1); i++)
    			{
    			System.out.print(" ");
    			}
    			System.out.print("\\");
    			int dots = 2 * HEIGHT - 2 * line;
    			for (int i = 1; i <= dots; i++)
    			{
    				System.out.print(":");
    			}
    			System.out.print("/");
    			}
    	}
    	// Produces the Vertical two line in the center
    	public static void drawVertical()
    	{
    		System.out.print("|");
    		System.out.print(" ");
    		system.out.print("|");
    		}
    	}
    	// Produces the bottom half of the hour glass
    	public static void drawBottomHalf()
    	{
    		for (int line = 1; line <= HEIGHT; line++)
    		{
    			for (int i = 1; i <= (HEIGHT - line); i++)
    			{
    				System.out.print(" ");
    			}
    			System.out.print("/")
    			for (int i = 1; i <= 2 * (line-1); i++)
    			{
    				System.out.print(":");
    			}
    			System.out.print("\\");
    			for (int i = 1; i <= (HEIGHT - line);
    			{
    				System.out.print(" ");
    			}
    		}
    	}
    }


  2. #2
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    Default Hour Glass

    Hello Everyone,

    I am trying to print out an Hour Glass figure using CONSTANTS so that I can change sizes from 4 to 10. The problem I am having is that I am getting a error message for my method called for on the bottom half.
    Here is the error message.
    HourGlass.java:56: error: class, interface, or enum expected
    	public static void drawBottomHalf()
    	              ^
    HourGlass.java:58: error: class, interface, or enum expected
    		for (int line = 1; line <= HEIGHT; line++)

    Here is my code for the hour glass figure.
    public class HourGlass
    {
    	public static final int HEIGHT = 4;
     
    	public static void main(String[] args)
    	{
    		drawTop();
    		drawTopHalf();
    		drawVertical();
    		drawBottomHalf();
    		drawTop();
    	}
     
    	// Produces the top part of the hour glass
    	public static void drawTop()
    	{
    		System.out.print("|");
    		for (int i = 1; 1 <= (2 * HEIGHT + 1); i++)
    		{
    			System.out.print("\"");
    		}
    		System.out.println("|");
    	}
     
    	// Produces the top half of the hour glass
    	public static void drawTopHalf()
    	{
    		for (int line = 1; line <= HEIGHT; line++)
    		{
    			for (int i = 1; i <= (line-1); i++)
    			{
    			System.out.print(" ");
    			}
    			System.out.print("\\");
    			int dots = 2 * HEIGHT - 2 * line;
    			for (int i = 1; i <= dots; i++)
    			{
    				System.out.print(":");
    			}
    			System.out.print("/");
    			}
    	}
    	// Produces the Vertical two line in the center
    	public static void drawVertical()
    	{
    		System.out.print("|");
    		System.out.print(" ");
    		system.out.print("|");
    		}
    	}
    	// Produces the bottom half of the hour glass
    	public static void drawBottomHalf()
    	{
    		for (int line = 1; line <= HEIGHT; line++)
    		{
    			for (int i = 1; i <= (HEIGHT - line); i++)
    			{
    				System.out.print(" ");
    			}
    			System.out.print("/")
    			for (int i = 1; i <= 2 * (line-1); i++)
    			{
    				System.out.print(":");
    			}
    			System.out.print("\\");
    			for (int i = 1; i <= (HEIGHT - line);
    			{
    				System.out.print(" ");
    			}
    		}
    	}

    I can't seem to see how this bottom half of the method is different from the top have of the method. So I don't understand what the error is or why it is giving me this error.

    Any suggestions on how to fix this would be great.

    Thanks.

  3. #3
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    Default Re: Displaying an hourglass 2

    Post moved to own thread.
    HourGlass.java:56: error: class, interface, or enum expected
    Check that the {}s are properly paired somewhere before the line where the error message points.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Hour Glass

    Methods should be inside classes but NOT inside other methods. Check that the '{' and '}' match up correctly.

    I think Norm helped, but please don't make multiple posts for the same topic. Threads merged into one.

  5. #5
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    Default Re: Displaying an hourglass 2

    Ok that worked. I had one too many } brackets above it.

    Thanks

    --- Update ---

    Well,

    Once I fix the bracket issue for my Bottom Half method. I tried to finish the code by adding the top part of the method again to the bottom. Now I am getting an error that says
    HourGlass.java:79: error: illegal start of expression
    	public static void drawTop()
    	^
    HourGlass.java:79: error: illegal start of expression
    	public static void drawTop()

    I have move and added brackets above the expression and to me it seems that all my methods are lined up under class and that each method is closed off. Unless I am not see it. Here is my code with the added Top half to the bottom of it.
    public class HourGlass
    {
    	public static final int HEIGHT = 4;
     
    	public static void main(String[] args)
    	{
    		drawTop();
    		drawTopHalf();
    		drawVertical();
    		drawBottomHalf();
    		drawTop();
    	}
     
    	// Produces the top part of the hour glass
    	public static void drawTop()
    	{
    		System.out.print("|");
    		for (int i = 1; 1 <= (2 * HEIGHT + 1); i++)
    		{
    			System.out.print("\"");
    		}
    		System.out.println("|");
    	}
     
    	// Produces the top half of the hour glass
    	public static void drawTopHalf()
    	{
    		for (int line = 1; line <= HEIGHT; line++)
    		{
    			for (int i = 1; i <= (line-1); i++)
    			{
    			System.out.print(" ");
    			}
    			System.out.print("\\");
    			int dots = 2 * HEIGHT - 2 * line;
    			for (int i = 1; i <= dots; i++)
    			{
    				System.out.print(":");
    			}
    			System.out.print("/");
    			}
    	}
     
    	// Produces the Vertical two line in the center
    	public static void drawVertical()
    	{
    		System.out.print("|");
    		System.out.print(" ");
    		system.out.print("|");
     
    	}
     
    	// Produces the bottom half of the hour glass
    	public static void drawBottomHalf()
    	{
    		for (int line = 1; line <= HEIGHT; line++)
    		{
    			for (int i = 1; i <= (HEIGHT - line); i++)
    			{
    				System.out.print(" ");
    			}
    			System.out.print("/");
    			for (int i = 1; i <= 2 * (line-1); i++)
    			{
    				System.out.print(":");
    			}
    			System.out.print("\\");
    			for (int i = 1; i <= (HEIGHT - line); i++)
    			{
    			System.out.print(" ");
     
    	}
     
    	// Produces the top part of the hour glass
    	public static void drawTop()
    	{
    		System.out.print("|");
    		{
    		for (int i = 1; 1 <= (2 * HEIGHT + 1); i++)
    		{
    			System.out.print("\"");
    		}
    		System.out.println("|");
    	}
    }

  6. #6
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    Default Re: Displaying an hourglass 2

    HourGlass.java:79: error: illegal start of expression
    Looks like you need to check the {}s again.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Displaying an hourglass 2

    yeah I have tried moving adding and deleting {} and I can not get it to work. I don's understand this simple process of {}. I know it is used to group together related bits of code. I open and closed off my other method so why I am getting this error.

  8. #8
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    Default Re: Displaying an hourglass 2

    why I am getting this error.
    Because the {}s are not properly paired.
    If you can't find the mismatched pair, a couple of suggestions:
    1)print the source file and use a pencil to connect every { with it's }
    2)add a comment with a number to each { and add a comment with the same number of the pairing }
    3)Some IDEs have a Find the pairing symbol function: place the cursor on one {, press some keys (mine is CTRL+]) and the cursor moves to the pairing }
    If you don't understand my answer, don't ignore it, ask a question.

  9. #9
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    Default Re: Displaying an hourglass 2

    There are one too many '{'s in the last drawTop() method, AND there are too many drawTop() methods. A single method called drawTop() can be called multiple times, but multiple methods called drawTop() is not allowed.

    There are TWO too few '}'s in drawBottom().

    There is also one 'system' that should be "System".

    What editor are you using?

  10. #10
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    Default Re: Displaying an hourglass 2

    jGRASP

  11. #11
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    Default Re: Displaying an hourglass 2

    I don't know it, but I found this tip that might be helpful:

    Cleaning-Up Indenting: jGrasp does not have a command that re-indents code, but you can trick it into doing so.
    Click on View+Generate CSD (or the button).
    Click on View+Remove CSD (or the button).

    Since the graphics are lost, the tip is here.

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