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Write a program to generate following pyramid pattern

Submitted by Deepali on Mon, 09/06/2010 - 17:05

/*
   Write a program to generate following pyramid pattern. Use for loop
   to generate the pyramid/triangle.
 
 *****
 ****
 ***
 **
 *
 *
 **
 ***
 ****
 ***** 
 
*/
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
 
public class Pyramid6 {
 public static void main(String args[]){
  
  try{
   
   System.out.println("Enter even number of lines to generate : ");
   BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
   int numberOfLines = Integer.parseInt(br.readLine());
   
   //for upper half and lower half
   int halfNumber = numberOfLines/2;
   
   //generate upper half first
   for(int i=halfNumber; i >= 1 ; i--){
    for(int j=0; j<i ; j++){
     System.out.print("*");
    }
    
    //generate new line
    System.out.println("");
   }
 
   //generate lower half
   for(int i=1; i <= halfNumber; i++){
    for(int j=0; j<i ; j++){
     System.out.print("*");
    }
    
    //generate new line
    System.out.println("");
   }
 
  }catch(NumberFormatException nfe) {
   System.out.println("Invalid number." + nfe);
  }catch(IOException ioe){
   System.out.println("IOException " + ioe);
  }
 }
}