What does the parameter '...' mean in java

First let’s take a look at the method of binding parameters encapsulated in jdbc, as follows:

/** * 绑定参数 * @param pstmt * @param os */ public static void executebindParam(PreparedStatement pstmt,Object ...os){ int len = os.length; try { for (int i = 0; i < len; i++) { pstmt.setObject(i+1, os[i]); } } catch (SQLException e) { e.printStackTrace(); } }

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The analysis is as follows:

Object ...osThis writing method started from Java 5. The Java language supports a new writing method for method parameters, called variable Length parameter list. Indicates that the parameters accepted here are 0 to multiple Object type objects, or an Object[].

Note the format of the variable-length parameter list:

1. There must not be a space between the parameter type and the three dots "..." (Object ...os), Object ...OS will not report an error;

2. Variable length parameter list This parameter must be the last parameter in the parameter list, otherwise an error will be reported.

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