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    <p>You should use <code>page.fillPoly()</code></p> <pre><code>int[] xPoints = {x1, x2, x3}; int[] yPoints = {y1, y2, y3}; page.fillPoly(xPoints, yPoints, 3); </code></pre> <p>See <a href="http://docs.oracle.com/javase/7/docs/api/java/awt/Graphics.html#fillPolygon%28int[],%20int[],%20int%29" rel="nofollow noreferrer">Graphics#fillPoly()</a></p> <p><b>Edit:</b> Try something like this, for an upside-down half-pyramid</p> <pre><code>int x1 = 0; int y1 = 0; int x2 = 100; int y2 = 0; for (int i = 0; i &lt; x2; i++){ g.drawLine(x1, y1, x2, y2); x1 += 1; y1 += 1; y2 += 1; } </code></pre> <p>This hasn't been tested, but I'm assuming at should print something like this</p> <pre><code>-------------- ------------- ------------ // with no spaces of course. ----------- ---------- --------- -------- .. and so on </code></pre> <p>Again this is just a guess.</p> <hr> <p><b>Edit: Tested and Approved :) </b></p> <pre><code>import java.awt.Dimension; import java.awt.Graphics; import javax.swing.JFrame; import javax.swing.JPanel; public class Test extends JPanel { protected void paintComponent(Graphics g) { super.paintComponent(g); int x1 = 0; int y1 = 0; int x2 = 100; int y2 = 0; for (int i = 0; i &lt; x2; i++) { g.drawLine(x1, y1, x2, y2); x1 += 1; y1 += 1; y2 += 1; } } public Dimension getPreferredSize() { return new Dimension(100, 100); } public static void main(String[] args) { JFrame frame = new JFrame(); frame.add(new Test()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.pack(); frame.setVisible(true); } } </code></pre> <p>Result</p> <p><img src="https://i.stack.imgur.com/AQbyW.png" alt="enter image description here"></p>
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    1. POHow to fill a triangle using lines from a loop
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    1. USPaul Samsotha
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    1. POHow to fill a triangle using lines from a loop
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    1. COI can't use fill polygon unfortunately. I'm supposed to find another way by drawing lines with a loop.
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    2. COOk you can try something like this. Draw a straight line. Add one to x1 and add one to y1 each iteration. This will give you an upside down half-pyramid.
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    3. COThanks. This was helpful.
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