public static void main ( String args [ ] ) {
  int mat [ ] [ ] = {
    {
      2 , 0 , 0 , 0 }, {
        0 , 2 , 0 , 0 }, {
          0 , 0 , 2 , 0 }, {
            0 , 0 , 0 , 2 }
          };
          if ( isScalarMatrix ( mat ) ) System . out . println ( "Yes" ) ;
          else System . out . println ( "No" ) ;
        }
        
public static void main ( String args [ ] ) { int mat [ ] [ ] = { { 2 , 0 , 0 , 0 } , { 0 , 2 , 0 , 0 } , { 0 , 0 , 2 , 0 } , { 0 , 0 , 0 , 2 } } ; if ( isScalarMatrix ( mat ) ) System . out . println ( " Yes " ) ; else System . out . println ( " No " ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) dimensions: (dimensions) value: (array_initializer (array_initializer (decimal_integer_literal) (decimal_integer_literal) (decimal_integer_literal) (decimal_integer_literal)) (array_initializer (decimal_integer_literal) (decimal_integer_literal) (decimal_integer_literal) (decimal_integer_literal)) (array_initializer (decimal_integer_literal) (decimal_integer_literal) (decimal_integer_literal) (decimal_integer_literal)) (array_initializer (decimal_integer_literal) (decimal_integer_literal) (decimal_integer_literal) (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (method_invocation name: (identifier) arguments: (argument_list (identifier)))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))))))