Printing asterisk triangle is common programming problem given to beginners learning Java language. This will help students to grasp the power of loop programming construct. There are a number of variants of this problem. The following example shows how a triangle pyramid can be printed using Java.

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

/**
 * How to print asterisk triangle pyramid in Java
 * @author jj
 */
public class AsteriskPyramid {
    
    public static void main(String[] args) {
        int sizeOfPyramid = 8;
        
        for(int i=1;i<=sizeOfPyramid;i++) {
			// print reduced number of spaces for each new row
            for(int j=i;j<=sizeOfPyramid-1;j++) {
                System.out.print(" ");
            }
			
			// the number of asterisks per row is 2*rownumber-1
            for(int k=1;k<=2*i-1;k++){
                System.out.print("*");
            }
            System.out.println("");
        }
    }
}