Question

I draw a triangle using line. How can I fill color on it? So far I can only success color the line but not fill the color.

public void paintComponent(Graphics g){         super.paintComponents(g);         int k=0;         for (j=0 ; j < numOfLines; j++){    // the values of numOfLines retrieved from other method.         g.setColor(Color.green);         g.drawLine(x[k], x[k+1], x[k+2], x[k+3]);         k = k+4;  //index files         } 

Answer 1

Make a Polygon from the vertices and fill that instead, by calling fillPolygon(...):

// A simple triangle. x[0]=100; x[1]=150; x[2]=50; y[0]=100; y[1]=150; y[2]=150; n = 3;  Polygon p = new Polygon(x, y, n);  // This polygon represents a triangle with the above                                    //   vertices.  g.fillPolygon(p);     // Fills the triangle above.