title: How to fill a triangle using Graphics class (Java)
body: <p>My goal is to be able to draw/fill in a triangle using the Graphics class. I was able to fill in/draw a rectangle &amp; a circle but when I try to compile my code I get the error below. </p>
  
  <p>I understand that the fill polygon method takes in type arrays but I don't know what other method to use other then .fillPologyon that takes in the parameters I want.</p>
  
  <p>Is there another method that I didn't try? Is there a way to convert my width &amp; height for my rttriangle while not messing up the code for drawing a rectangle.</p>
  
  <pre><code>DrawArea.java:62: error: no suitable method found for fillPolygon(int,int,int,int)
                      g.fillPolygon(100, 100, width, height);
                       ^
  method Graphics.fillPolygon(int[],int[],int) is not applicable
    (actual and formal argument lists differ in length)
  method Graphics.fillPolygon(Polygon) is not applicable
    (actual and formal argument lists differ in length)
    1 error
  
  import java.awt.*;
  import javax.swing.*;
  public class DrawArea extends JComponent {
  private int radius;
  private int width; // base for rt trig
  private int height;
  //private int [] w = new int[]
  //private int [] h = new int[];
  private String shape;
  
  /**
   * constructor for circle
   * @param shape string "circle"
   * @param r the radius the user entered
   */
  public DrawArea(String shape, int r){
      this.shape = shape;
      radius = r;
  }
  /**
   * constructor for rectangle and right triangle
   * @param shape either the string "rectanlge" or "triangle"
   * @param w - either the width or the base
   * @param h - height of rect or tri
   */
  public DrawArea(String shape, int w, int h){
      this.shape = shape;
      width = w;
      height = h;
  
  
  }
  /**
   * paint method that draws the selected shape
   */
  public void paintComponent(Graphics g){ // Graphic g is and object allows you to set color to green
      removeAll();
      if(shape.equals("circle")){
          //Set color to green
          g.setColor(Color.green);
          // 100 pixels down 100 pixels over
          //How wide and how tall = radius *2 = diamter
          //There broth width and height
          g.fillOval(100, 100, radius * 2, radius * 2);   
      }else if(shape.equals("rectangle")){
          g.setColor(Color.green);
          g.fillRect(100, 100, width, height);   //change  **************************************
      //}else{
  
      }else if(shape.equals("rtTriangle")){
          g.setColor(Color.green);
          g.fillPolygon(100, 100, width, height);
      }
    }
  }
  </code></pre>