static char maxRepeating ( String str ) {
  int len = str . length ( ) ;
  int count = 0 ;
  char res = str . charAt ( 0 ) ;
  for ( int i = 0 ;
  i < len ;
  i ++ ) {
    int cur_count = 1 ;
    for ( int j = i + 1 ;
    j < len ;
    j ++ ) {
      if ( str . charAt ( i ) != str . charAt ( j ) ) break ;
      cur_count ++ ;
    }
    if ( cur_count > count ) {
      count = cur_count ;
      res = str . charAt ( i ) ;
    }
  }
  return res ;
}

static char maxRepeating ( String str ) { int len = str . length ( ) ; int count = 0 ; char res = str . charAt ( 0 ) ; for ( int i = 0 ; i < len ; i ++ ) { int cur_count = 1 ; for ( int j = i + 1 ; j < len ; j ++ ) { if ( str . charAt ( i ) != str . charAt ( j ) ) break ; cur_count ++ ; } if ( cur_count > count ) { count = cur_count ; res = str . charAt ( i ) ; } } return res ; }
(method_declaration (modifiers) type: (integral_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)))) (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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) (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: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (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: (break_statement)) (expression_statement (update_expression (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))))))) (return_statement (identifier))))