Pessoal fiquei com grande duvida sobre uma opção de uma pergunta do livro da kathy;
Esta declaração é válida para um tipo char??
char c4 = ‘\u0022’;
Na minha opnião sim, pois é uma notação Unicode. Ou eu estou errado, se estou, pq intaum??
Literal Caracter (Unicode)
4 Respostas
T
Neste caso em particular, é, porque é equivalente a:
char c4 = ‘"’;
Se em vez disso ela tivesse pedido:
char c4 = ‘\u0027’;
não seria, porque isto é equivalente a
char c4 = ‘’’;
(ou seja, erro de sintaxe - você não pode ter 3 aspas simples seguidas.
Isso é pegadinha, e não deveria cair em uma prova de verdade.
Obrigado thingol.
T
Essa parte de literais Unicode é legal. Pela JLS (e submetendo este programa a um compilador Java), o seguinte programa é válido:
\u0069\u006D\u0070\u006F\u0072\u0074 \u006A\u0061\u0076\u0061\u002E\u0075\u0074\u0069\u006C\u002E\u002A\u003B
\u0063\u006C\u0061\u0073\u0073 \u0045\u0078\u0065\u0072\u0063\u0069\u0063\u0069\u006F \u007B
\u0009\u0070\u0075\u0062\u006C\u0069\u0063 \u0073\u0074\u0061\u0074\u0069\u0063 \u0076\u006F\u0069\u0064 \u006D\u0061\u0069\u006E\u0028\u0053\u0074\u0072\u0069\u006E\u0067\u005B\u005D \u0061\u0072\u0067\u0073\u0029 \u007B
\u0009\u0009\u0053\u0063\u0061\u006E\u006E\u0065\u0072 \u0073\u0063\u0061\u006E \u003D \u006E\u0065\u0077 \u0053\u0063\u0061\u006E\u006E\u0065\u0072 \u0028\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u0069\u006E\u0029\u003B
\u0009\u0009\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u006F\u0075\u0074\u002E\u0070\u0072\u0069\u006E\u0074 \u0028\u0022\u004E\u006F\u006D\u0065 \u0064\u0061 \u0070\u0072\u0069\u006D\u0065\u0069\u0072\u0061 \u0070\u0065\u0073\u0073\u006F\u0061\u003A \u0022\u0029\u003B
\u0009\u0009\u0053\u0074\u0072\u0069\u006E\u0067 \u006E\u006F\u006D\u0065\u0031 \u003D \u0073\u0063\u0061\u006E\u002E\u006E\u0065\u0078\u0074\u004C\u0069\u006E\u0065\u0028\u0029\u003B
\u0009\u0009\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u006F\u0075\u0074\u002E\u0070\u0072\u0069\u006E\u0074 \u0028\u0022\u0050\u0065\u0073\u006F \u0065\u006D \u006B\u0067\u003A \u0022\u0029\u003B
\u0009\u0009\u0069\u006E\u0074 \u0070\u0065\u0073\u006F\u0031 \u003D \u0073\u0063\u0061\u006E\u002E\u006E\u0065\u0078\u0074\u0049\u006E\u0074\u0028\u0029\u003B \u0073\u0063\u0061\u006E\u002E\u006E\u0065\u0078\u0074\u004C\u0069\u006E\u0065\u0028\u0029\u003B
\u0009\u0009\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u006F\u0075\u0074\u002E\u0070\u0072\u0069\u006E\u0074 \u0028\u0022\u004E\u006F\u006D\u0065 \u0064\u0061 \u0073\u0065\u0067\u0075\u006E\u0064\u0061 \u0070\u0065\u0073\u0073\u006F\u0061\u003A \u0022\u0029\u003B
\u0009\u0009\u0053\u0074\u0072\u0069\u006E\u0067 \u006E\u006F\u006D\u0065\u0032 \u003D \u0073\u0063\u0061\u006E\u002E\u006E\u0065\u0078\u0074\u004C\u0069\u006E\u0065\u0028\u0029\u003B
\u0009\u0009\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u006F\u0075\u0074\u002E\u0070\u0072\u0069\u006E\u0074 \u0028\u0022\u0050\u0065\u0073\u006F \u0065\u006D \u006B\u0067\u003A \u0022\u0029\u003B
\u0009\u0009\u0069\u006E\u0074 \u0070\u0065\u0073\u006F\u0032 \u003D \u0073\u0063\u0061\u006E\u002E\u006E\u0065\u0078\u0074\u0049\u006E\u0074\u0028\u0029\u003B \u0073\u0063\u0061\u006E\u002E\u006E\u0065\u0078\u0074\u004C\u0069\u006E\u0065\u0028\u0029\u003B
\u0009\u0009\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u006F\u0075\u0074\u002E\u0070\u0072\u0069\u006E\u0074\u006C\u006E \u0028\u0022\u004F \u0069\u006E\u0064\u0069\u0076\u0069\u0064\u0075\u006F \u006D\u0061\u0069\u0073 \u0070\u0065\u0073\u0061\u0064\u006F \u0065\u0068\u003A \u0022\u0029\u003B
\u0009\u0009\u0069\u0066 \u0028\u0070\u0065\u0073\u006F\u0031 \u003E \u0070\u0065\u0073\u006F\u0032\u0029 \u007B
\u0009\u0009\u0009\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u006F\u0075\u0074\u002E\u0070\u0072\u0069\u006E\u0074\u0066 \u0028\u0022\u0025\u0073\u002C \u0063\u006F\u006D \u0025\u0064 \u006B\u0067\u0025\u006E\u0022\u002C \u006E\u006F\u006D\u0065\u0031\u002C \u0070\u0065\u0073\u006F\u0031\u0029\u003B
\u0009\u0009\u007D \u0065\u006C\u0073\u0065 \u0069\u0066 \u0028\u0070\u0065\u0073\u006F\u0031 \u003C \u0070\u0065\u0073\u006F\u0032\u0029 \u007B
\u0009\u0009\u0009\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u006F\u0075\u0074\u002E\u0070\u0072\u0069\u006E\u0074\u0066 \u0028\u0022\u0025\u0073\u002C \u0063\u006F\u006D \u0025\u0064 \u006B\u0067\u0025\u006E\u0022\u002C \u006E\u006F\u006D\u0065\u0032\u002C \u0070\u0065\u0073\u006F\u0032\u0029\u003B
\u0009\u0009\u007D \u0065\u006C\u0073\u0065 \u007B
\u0009\u0009\u0009\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u006F\u0075\u0074\u002E\u0070\u0072\u0069\u006E\u0074\u0066 \u0028\u0022\u0025\u0073 \u0065 \u0025\u0073 \u0074\u0065\u006D \u006F \u006D\u0065\u0073\u006D\u006F \u0070\u0065\u0073\u006F \u002D \u0025\u0064 \u006B\u0067\u0025\u006E\u0022\u002C \u006E\u006F\u006D\u0065\u0031\u002C \u006E\u006F\u006D\u0065\u0032\u002C \u0070\u0065\u0073\u006F\u0031\u0029\u003B
\u0009\u0009\u007D
\u0009\u007D
\u007D
:shock: bizarro… heheheh
Criado 6 de março de 2007
Ultima resposta 6 de mar. de 2007
Respostas 4
Participantes 2
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