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如何确定固定状态是粗略的?
原标题:How to specify a constant is a byte or short?
  • 时间:2012-01-14 08:01:14
  •  标签:
  • java

就长期的数据类型而言,我可以把一些数据与L混在一起,使汇编者知道它很长。 • 什么是 by?

作为动机,以下因素会产生一种类型的差错:

List<Short> a = Arrays.asList(1, 2, 3, 4);
最佳回答

您实际谈论的是:tteger literal<>em>(1) 相对于长literal (1L)。 确实,在 Java没有短或直言。 但 确实如此,因为从ger字字面到<代码>byte、<代码>short和<代码><<<<>。 因此:

final byte one = 1;  // no typecast required.

只有在字面上达到规定范围时,才允许默示转换。 如果是,你需要一种类型;例如,

final byte minusOne = (byte) 255;  // the true range of byte is -128 .. +127

还有一些情况需要明确转换;例如,不明确的方法超负荷,或以某种表述强行作出具体解释。 在这种情况下,你需要使用一 cast子进行转换。

Your example is another of those cases.


但底线是,没有任何 Java辛税表示<条码>byte或<条码>short字面。

问题回答

For example:

public static final byte CURRENCY_SYMBOL = 26;

public static final short MAX_VALUE = 3276;




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