“最终阻止无法正常完成" Eclipse警告 [英] 'finally block does not complete normally' Eclipse warning
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问题描述
Eclipse在以下代码中给我该警告:
Eclipse give me that warning in the following code:
public int getTicket(int lotteryId, String player) {
try {
c = DriverManager.getConnection("jdbc:mysql://" + this.hostname + ":" + this.port + "/" + this.database, this.user, this.password);
int ticketNumber;
PreparedStatement p = c.prepareStatement(
"SELECT max(num_ticket) " +
"FROM loteria_tickets " +
"WHERE id_loteria = ?"
);
p.setInt(1, lotteryId);
ResultSet rs = p.executeQuery();
if (rs.next()) {
ticketNumber = rs.getInt(1);
} else {
ticketNumber = -1;
}
ticketNumber++;
p = c.prepareStatement(
"INSERT INTO loteria_tickets " +
"VALUES (?,?,?,?)");
p.setInt(1, lotteryId);
p.setInt(2, ticketNumber);
p.setString(3, player);
p.setDate(4, new java.sql.Date((new java.util.Date()).getTime()));
p.executeUpdate();
return ticketNumber;
} catch (Exception e) {
e.printStackTrace();
} finally {
if (c != null) {
try {
c.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return -1;
}
}
我的代码有什么问题?
推荐答案
从其中删除return语句.最终块被认为是清除块,通常不希望在其中返回.
remove return statement from it. Final block is considered to be cleanup block, return is not generally expected in it.
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