public static void findPair ( int [ ] arr , int n ) {
  HashSet < Integer > s = new HashSet < Integer > ( ) ;
  for ( Integer i : arr ) {
    s . add ( i ) ;
  }
  boolean found = false ;
  for ( int i = 0 ;
  i < n - 1 ;
  i ++ ) {
    for ( int j = i + 1 ;
    j < n ;
    j ++ ) {
      int sum = arr [ i ] + arr [ j ] ;
      if ( s . contains ( sum ) ) {
        found = true ;
        System . out . println ( arr [ i ] + " " + arr [ j ] ) ;
      }
    }
  }
  if ( found == false ) System . out . println ( "Not Exist " ) ;
}

public static void findPair ( int [ ] arr , int n ) { HashSet < Integer > s = new HashSet < Integer > ( ) ; for ( Integer i : arr ) { s . add ( i ) ; } boolean found = false ; for ( int i = 0 ; i < n - 1 ; i ++ ) { for ( int j = i + 1 ; j < n ; j ++ ) { int sum = arr [ i ] + arr [ j ] ; if ( s . contains ( sum ) ) { found = true ; System . out . println ( arr [ i ] + " ▁ " + arr [ j ] ) ; } } } if ( found == false ) System . out . println ( " Not ▁ Exist ▁ " ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments (type_identifier))) arguments: (argument_list)))) (enhanced_for_statement type: (type_identifier) name: (identifier) value: (identifier) body: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (false))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) update: (update_expression (identifier)) body: (block (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 (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (identifier))))) (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (true))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (string_literal)) right: (array_access array: (identifier) index: (identifier)))))))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (false))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))))))