Java 检查变量是 Long 还是 Double
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时间：2020-08-14 15:00:16 来源:igfitidea点击:
Checking if variable is Long or Double
提问by Gondim
Is there any way to check if the varible is Double or Long before doing anything with it? Sometimes the Objects are Double and some they are Long. How can I check it before using it?
有没有办法在对变量做任何事情之前检查它是 Double 还是 Long ？有时对象是双重的，有些对象是长的。使用前如何检查？
采纳答案by ColinD
if (obj instanceof Double) ...
回答by wkl
You could use instanceof.
你可以使用instanceof.
public void someMethod(Object o)
{
if ( o instanceof Long )
{
// do stuff
}
else if ( o instanceof Double )
{
// do stuff
}
}
