static boolean allCharactersSame ( String s ) {
  int n = s . length ( ) ;
  for ( int i = 1 ;
  i < n ;
  i ++ ) if ( s . charAt ( i ) != s . charAt ( 0 ) ) return false ;
  return true ;
}

static boolean allCharactersSame ( String s ) { int n = s . length ( ) ; for ( int i = 1 ; i < n ; i ++ ) if ( s . charAt ( i ) != s . charAt ( 0 ) ) return false ; return true ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (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 (decimal_integer_literal))))) consequence: (return_statement (false)))) (return_statement (true))))