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Thread: Workshop 6

  1. #1
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    Default Workshop 6

    [B]Write a Java class definition for class Rectangle. Each object of this class has the following variables:
    height : an integer value representing height.
    width : an integer value representing width.
    Your class should also define the following methods:
     A constructor that accepts two integer parameters. First parameter is for height, second parameter is for width. If any parameter is not in the range of [1, 10] inclusive, then it must be set to 3 by default.
     draw method. This will draw the rectangle on the screen. For the edges of the rectangle, use ‘#’ character. For the inside of rectangle, use space character.
    Have the main method in the Rectangle class. Put this main method as it is. Do not make any change on this method.
    public static void main(String[] args) {
    System.out.println("COP 2253, Workshop6. This program written by Bilal Gonen");
    System.out.println();
    Rectangle r1 = new Rectangle(-1, 11);
    r1.draw();
    Rectangle r2 = new Rectangle(4,5);
    r2.draw();
    }
    Submission
     Submit 2 files: Rectangle.java , screen shot.
     Follow submission instructions under the General Info module on e-learning.[/B]


    Already tried:
    [B]/*
    Angel Williams
    COP 2253 - Workshop 6
    Mar 20, 2013
    */
     
       public class Rectangle {
      		 private int height, width;
     
       public Rectangle(){
          height = 0;
          width = 0;
       }
     
    	public Rectangle(int hei, int wid){
          height = hei;
          width = wid;
       } 
    	public void draw(){
    		for(int i = 0; i < width; i++){
    		}
    			for (int j= 0; j <= height; j++) {
    			}	
    				if ( i 
    			System.out.print("#");
    		}
     
     
     
     
     
       public static void main(String[] args) {
             System.out.println("COP 2253, Workshop6. This program written by Angel Williams\n");
             /**Rectangle r1 = new Rectangle(-1, 11);
             r1.draw();*/
             Rectangle r2 = new Rectangle(4,5);
             r2.draw();
          }
       }[/B]


  2. #2
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    Default Re: Workshop 6

    Do you have a question about or problems with the code you posted?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Workshop 6

    Yes, i do. Is my code that I wrote right? and how can I drew the method in rectangle?

  4. #4
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    Default Re: Workshop 6

    Is my code that I wrote right?
    What determines if the code is "right"?
    Does it compile, execute and produce the right results? Then it could be right.
    I would deduct 30% for lack of comments and documentation.

    how can I drew the method in rectangle
    Do you mean: how can I draw the rectangle in the method?

    What is the rectangle supposed to look like? Can you post an example?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Workshop 6

    yes, that is what I mean. Sorry for confusion. The output for the rectangle look like :
    COP 2253, Workshop6. This program written by Angel Williams

    ###
    # #
    ###

    #####
    # #
    # #
    #####
    Last edited by Norm; March 20th, 2013 at 08:23 PM. Reason: tags didn't work

  6. #6
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    Default Re: Workshop 6

    Look at the two different types of lines printed:
    The top and bottom solid row of #
    The middle ones with only # at the sides

    Use a loop for the number of rows
    and some if statements to determine which of the two types of lines to print based on the row number.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Workshop 6

    Can you show me?

  8. #8
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    Default Re: Workshop 6

    Give it a try. Do it in steps.
    First write the loop.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Workshop 6

    ok

    --- Update ---

    public void draw(){
    		for(int i = 3; i < width; i++){
    		}
    		System.out.println("#");
    			for (int j= 3; j <= height; j++) {
    			}
    			System.out.println("#####");

  10. #10
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    Default Re: Workshop 6

    I see two loops???
    In the ONE loop add an if statement
    to print "*****" on the first and last lines of the box
    and to print "*" on the lines in between
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Workshop 6

    Like this:
                            for (int j= 3; j <= height; j++) {
    			}
    			  if ((x>0&&x<height-1)&&(y>0&&y<width-1)){
    					System.out.print("#  "); {
    					}else
    					System.out.print("#####"); {
    					}
    					System.out.println(); {
    					}

  12. #12
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    Default Re: Workshop 6

    The code you posted will not compile or execute for testing.

    What does the code print out when executed? I expect this:

    *****
    *
    *
    *
    *****

    with a height of 5.


    If that is what is printing, the next step is to
    replace the print("****")
    with a loop to print width number of "*"
    and to add with print("*")
    a loop to print width-2 spaces followed by print("*")

    I'm done for tonight. Back tomorrow.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Workshop 6

    Can you give me an example

  14. #14
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    Default Re: Workshop 6

    An example of what?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Workshop 6

    of replace the print("****")
    with a loop to print width number of "*"
    and to add with print("*")
    a loop to print width-2 spaces followed by print("*")

  16. #16
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    Default Re: Workshop 6

    From post#9
    for(int i = 3; i < width; i++){
    }
    	System.out.println("#");  //  print some #s on this row
    }
    If you don't understand my answer, don't ignore it, ask a question.

  17. #17
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    Default Re: Workshop 6

    Like this?
    public void draw(){
    		for(int i = 0; i < width; i++){
    			System.out.print("#");
    			}
    			System.out.print("#  #");
           	}

  18. #18
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    Default Re: Workshop 6

    What happens when the code is compiled and executed?
    Did you ever write the code for what I suggested in posts #6 #8 and #10?

    That would be a starting point. when that code worked you could change it as suggested in post#12
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Workshop 6

    yes i did but can you give me a hint about the code?

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    Default Re: Workshop 6

    Are you going to attempt this yourself are you just expecting someone to spoonfeed you the code?
    Improving the world one idiot at a time!

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    Default Re: Workshop 6

    I am attempting this myself

    --- Update ---

    public void draw(){
    		for(int i = 3; i < width; i++){
    		}
    			for(int j = 5; j < height; j++){
    			}
    				if(width == 3 || width == 3){
    				System.out.print("#");
    				}
    				else if(height ==5 || height == 4){
    				System.out.print(" ");
    				}
    Is this right?

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    Default Re: Workshop 6

    if(width == 3 || width == 3){
    Really?
    Improving the world one idiot at a time!

  23. #23
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    Default Re: Workshop 6

    or if (width < 1 || width >10 ?

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    Default Re: Workshop 6

    You really should not be hard coding magic numbers. What happens if a user enters a value that does not fit? You need to make it dynamic. So the code should print a full line on the first and last line. How do you think you can determine what is the first and last line when user enters 5 and 10 or 12 and 20?
    Improving the world one idiot at a time!

  25. #25
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    Default Re: Workshop 6

    Tell me what I should do?

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