Java program print 1 to 4 in reverse triangle.

class t3
{
public static void main(String a[])
{
  int i,j;
  for(i=4;i>=1;i--)
     {
      for(j=i;j>=1;j--)
          {
           System.out.print (j);
          }
       System.out.println (" ");
     }
}
}