public static int removeZero ( int n ) {
  int res = 0 ;
  int d = 1 ;
  while ( n > 0 ) {
    if ( n % 10 != 0 ) {
      res += ( n % 10 ) * d ;
      d *= 10 ;
    }
    n /= 10 ;
  }
  return res ;
}

public static int removeZero ( int n ) { int res = 0 ; int d = 1 ; while ( n > 0 ) { if ( n % 10 != 0 ) { res += ( n % 10 ) * d ; d *= 10 ; } n /= 10 ; } return res ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (return_statement (identifier))))