Printing triangle pattern in java

import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Main 
{
public static void main(String args[])
{
int n = 0;
try
{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.print("\nEnter the number of rows : ");
n = Integer.parseInt(br.readLine());

for(int i = 0; i < n; i++)
{
for(int j= 0; j < (n-i); j++)
{
System.out.print(" ");
}//for j
for(int j = 0; j <= i; j++)
{
System.out.print("* ");
}//for j
System.out.print("\n");
}//for i

for(int i = 0; i < n; i++)
{
for(int j = 0; j <= i; j++)
{
System.out.print(" ");
}//for j
for(int j= 0; j < (n-i); j++)
{
System.out.print("* ");
}//for j
System.out.print("\n");
}//for i

}//try
catch(Exception e)
{
System.out.print("\nException : " + e);
}//catch
}//PSVM
}//class Main

Output:-

Enter number of rows : 5

     * 

    * * 

   * * * 

  * * * * 

 * * * * * 

Printing diamond pattern in java

import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Main 
{
public static void main(String args[])
{
int n = 0;
try
{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.print("\nEnter the number of rows : ");
n = Integer.parseInt(br.readLine());

for(int i = 0; i < n; i++)
{
for(int j= 0; j < (n-i); j++)
{
System.out.print(" ");
}
for(int j = 0; j <= i; j++)
{
System.out.print("* ");
}
System.out.print("\n");
}//for i

for(int i = 0; i < n; i++)
{
for(int j = 0; j <= i; j++)
{
System.out.print(" ");
}
for(int j= 0; j < (n-i); j++)
{
System.out.print("* ");
}
System.out.print("\n");
}//for i

}
catch(Exception e)
{

}
}
}

Output :-
     *
    * *
   * * *
  * * * *
 * * * * *
 * * * * *
  * * * *
   * * *
    * *
     *