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);
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);
您实际谈论的是:tteger literal<>em>(1
) 相对于长1L
)。 确实,在 Java没有短或直言。 但
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。
http://www.janeg.ca/scjp/lang/literals.html” rel=“noreferer”> 它在使用时自动为你服务。
If an int literal is assigned to a short or a byte and it s value is within legal range, the literal is assumed to be a short or a byte.
For example:
public static final byte CURRENCY_SYMBOL = 26;
public static final short MAX_VALUE = 3276;
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