public static void printArray ( int arr [ ] [ ] , int row , int col ) {
  HashSet < String > set = new HashSet < String > ( ) ;
  for ( int i = 0 ;
  i < row ;
  i ++ ) {
    String s = "" ;
    for ( int j = 0 ;
    j < col ;
    j ++ ) s += String . valueOf ( arr [ i ] [ j ] ) ;
    if ( ! set . contains ( s ) ) {
      set . add ( s ) ;
      System . out . println ( s ) ;
    }
  }
}

public static void printArray ( int arr [ ] [ ] , int row , int col ) { HashSet < String > set = new HashSet < String > ( ) ; for ( int i = 0 ; i < row ; i ++ ) { String s = " " ; for ( int j = 0 ; j < col ; j ++ ) s += String . valueOf ( arr [ i ] [ j ] ) ; if ( ! set . contains ( s ) ) { set . add ( s ) ; System . out . println ( s ) ; } } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) 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)))) (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: (type_identifier) declarator: (variable_declarator name: (identifier) value: (string_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: (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier))))))) (if_statement condition: (parenthesized_expression (unary_expression operand: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))))))