本文介绍了Java instanceof与更改对象的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我需要一个方法,我可以传递一个参数,我认为这是一个Class(不确定),而在该方法中,instanceof将用于检查x是否是传递的Class的一个实例。我该怎么办?
解决方案
如何做到这一点:
public boolean checker(Object obj){
return obj instanceof SomeClass;
}
或者SomeClass是一个参数:
public boolean checker(Object obj,Class someclass){
return someClass.isInstance(obj);
}
或者如果您希望实例为 someClass
而不是 someClass
的子类的实例:
public boolean checker(Object obj,Class someclass){
return someClass.equals(obj.getClass());
}
I need a method where i could pass on a parameter which i assume would be a Class (not sure though) and in that method, instanceof would be used to check if x is an instance of the passed Class.
How should i do that? I tried a few things but none worked.
解决方案
How about this:
public boolean checker(Object obj) {
return obj instanceof SomeClass;
}
or if SomeClass is a parameter:
public boolean checker(Object obj, Class someclass) {
return someClass.isInstance(obj);
}
or if you want the instance to be someClass
and NOT an instance of a subclass of someClass
:
public boolean checker(Object obj, Class someclass) {
return someClass.equals(obj.getClass());
}
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