Object obj=new Object(); System.out.println(Class.forName(c).isInstanceClassNotFoundException; must be caught or System.out.println(Class.forName(c).isInstance
,根据我的c++/c#知识,我编写了如下内容: def __init__(self, x=0.0, y=0.0, z=0.0):
assert (isinstance(x, float) or isinstance(x, int)) and (isinstance(y, float) or isinstance(y, int)) and \(isinstance(z, float) or isinstance(z, int)
javaInterface返回一个Object或null。我怎么才能写得比 o <- Option(javaInterface.getValue) if o.isInstanceOf[String] yield o.asInstanceOf[String]for { o <- Option(a.getValue) if o.isInstanceOf[String] yie