Help me to get the algorithm for this assingment.

Question

I have tried to draw the x-y axis and the rectangle. I hava a problem to draw the rectangle inside of the lablled grid.
NEED EVERYONE'S HELP HERE!
Assignment #4
Goal:
�     This lab gives students more experience in
�     developing proper algorithms for real-life problems;
�     using program constructs � sequential, selection, and repetition.
Algorithm. An algorithm is a description of steps to solve a problem that is unambiguous, executable, and terminating. In order to solve a problem by computer, you must know an algorithm for finding a solution.
Problem Description
Develop an algorithm and then write a java program that can accept commands from the user to draw a rectangle. The program should accept the xy-coordinate pair of the upper-left corner, and the width and height of a rectangle. It should then draw the rectangle pattern on a 40 X 20 labelled grid. For example, if the upper-left corner is (5, 10) with a width of 10 and height of 5, then the program would display:
^
20+
|     
|
|
|
|     
15+
|
|
|
|     
10+
| ++++++++++
| ++++++++++
| ++++++++++
| ++++++++++
5+ ++++++++++
|
|
|
|     
________________________________>
0 5 10 15 20 25 30 35 40     
     Upper Left (5,10) width:10, Height: 5
NOTE:
�     Your display should include the labelled axis, as shown on the previous page, and also the lines that are drawn horizontally across the page.
�     Make sure the rectangle will fit on the 40X20 grid.
�     Appropriate error messages must be displayed for invalid data provided by the user.

Answer 1

If you format your code, it looks like thispublic class Rectangle {
  public static void main(String[] args) {
    int maxYAxisPoint = 20;
    int maxXAxisPoint = 40;
    int xCoodinate = 5;
    int yCoodinate = 10;
    int width = 5;
    int height = 10;
    int leftLowPoint;
    System.out.println("This program draw a rectangle pattern on a 40*20 labelled grid.");
    System.out.println("Please enter the x-coordinate of the upper left point: ");
    xCoodinate = MyIO.readLineInt();
    System.out.println("Please enter the y-coordinate of the upper left point: ");
    yCoodinate = MyIO.readLineInt();
    System.out.println("Please enter the width of the rectangle: ");
    width = MyIO.readLineInt();
    System.out.print("Enter the height of the rectangle:");
    height = MyIO.readLineInt();
    if (yCoodinate < maxYAxisPoint && yCoodinate + width < 40 ||
        xCoodinate + width < maxXAxisPoint &&
        xCoodinate + height < maxYAxisPoint) {
      System.out.println(" ^");
      for (maxYAxisPoint = 20; maxYAxisPoint >= 0; maxYAxisPoint--) {
        if ( (maxYAxisPoint % 5) == 0) {
          System.out.println(maxYAxisPoint + "+");
          for (leftLowPoint = (maxYAxisPoint - height) + 1;
               leftLowPoint <= yCoodinate; leftLowPoint--) {
            System.out.println("+");
          //Draw the x-axis
          for (maxXAxisPoint = 0; maxXAxisPoint <= 40; maxXAxisPoint++) {
            System.out.print("+____");
            System.out.println("+>");
          for (maxXAxisPoint = 0; maxXAxisPoint <= 40; maxXAxisPoint++) {
            System.out.print(maxXAxisPoint + " ");
        } else {
          System.out.print(" | \n" + " |\n" + " |\n" + " |");
    } else {
      System.out.print("You entered a wrong x-y coordinate of the rectangle,\n the rectangle is not in the labelled grid.");
    System.out.print("Upper Left(" + xCoodinate + "," + yCoodinate + ")");
    System.out.print("width:" + width);
    System.out.println("height: " + height);
}You have nested your loops. I'm pretty sure you don't want to do this. Here's an example of the difference. First a nested looppublic class Test2 {
  public static void main(String[] args) {
    for (int i=0; i<3; i++) {
      System.out.println("i="+i);
      for (int j=0; j<4; j++) {
        System.out.println("  j="+j);
Outputs this
i=0
  j=0
  j=1
  j=2
  j=3
i=1
  j=0
  j=1
  j=2
  j=3
i=2
  j=0
  j=1
  j=2
  j=3Now an unnested looppublic class Test2 {
  public static void main(String[] args) {
    for (int i=0; i<3; i++) {
      System.out.println("i="+i);
    for (int j=0; j<4; j++) {
      System.out.println("  j="+j);
outputs this
i=0
i=1
i=2
  j=0
  j=1
  j=2
  j=3This means you are printing the x-axis for every point on the graph.