static boolean isPalindrome ( String str , int l , int r ) {
  while ( l < r ) {
    if ( str . charAt ( l ) != str . charAt ( r ) ) return false ;
    l ++ ;
    r -- ;
  }
  return true ;
}

static boolean isPalindrome ( String str , int l , int r ) { while ( l < r ) { if ( str . charAt ( l ) != str . charAt ( r ) ) return false ; l ++ ; r -- ; } return true ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) consequence: (return_statement (false))) (expression_statement (update_expression (identifier))) (expression_statement (update_expression (identifier))))) (return_statement (true))))