Dear Friends, I am new to java and i faced one program.Can any one just help me getting output for this program given below:

a

a b

a b c

a b c d

a b c d e

a b c d e f

a b c d e

a b c d

a b c

a b

a

Its a triangle program.how can we get this out using for loop.please help me.Thank you!!!

public class Pattern{
    public static void main(String []args){
           for(int i=97;i<=102;i++){
                for(int j=97;j<=i;j++){
                System.out.print((char)j);
                }
                System.out.println();
           }
           for(int j=102;j>=97;j--){
                for(int i=97;i<j;i++) {
                System.out.print((char)i);
                }
                System.out.println();
           }
        }
    }

import java.io.*;
class Triangle1{
 void display(){
   int i,j,k,m=5;
      char a;
       for(i=1;i<=5;i++){
          a='a';
          for(j=m;j>=1;j--)
              System.out.print(" ");
               for(k=1;k<=i;k++)
                  System.out.print(a++ +" ");
           m--;
     System.out.println();
   }
  m=2;
     for(i=4;i>=1;i--){
        a='a';
          for(j=m;j>=1;j--)
              System.out.print(" ");
               for(k=1;k<=i;k++)
                  System.out.print(a++ +" ");
           m++;
     System.out.println();
   }
 }
}
class Triangle{
 public static void main(String args[]){
    Triangle1 tr=new Triangle1();
        tr.display();
     }
}

Thank you my friend this would really help me.Thank you so much!!!!