static int checkPalindrome ( int num ) {
  String str = String . valueOf ( num ) ;
  int l = 0 , r = str . length ( ) - 1 ;
  while ( l < r ) {
    if ( str . charAt ( l ) != str . charAt ( r ) ) {
      return 0 ;
    }
    l ++ ;
    r -- ;
  }
  return num ;
}

static int checkPalindrome ( int num ) { String str = String . valueOf ( num ) ; int l = 0 , r = str . length ( ) - 1 ; while ( l < r ) { if ( str . charAt ( l ) != str . charAt ( r ) ) { return 0 ; } l ++ ; r -- ; } return num ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (decimal_integer_literal)))) (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: (block (return_statement (decimal_integer_literal)))) (expression_statement (update_expression (identifier))) (expression_statement (update_expression (identifier))))) (return_statement (identifier))))