Java - Eclipse问题中的多个包

Question

I have the following set of packages within my source folder. The packages are shapes,model,views.

Say I have a class file in my model folder that has the following piece of code:

  shapes.interfaceforshapes[][] temp = model.get2dshapearray();


if(temp[x][y].getClass().isInstance(shapes.cTriangle)){

            }

Please note in the above code temp[x][y] will return a class that interfaces my shapeInterface and all classes within the shapes folder interface this.

Am I doing the correct thing to say "Is the class within my array of type cTriangle"?

I currently get the error:

shapes.cTriangle cannot be resolved to a variable

but I don't want to match a variable, I want to test it agaisnt the class cTriangle within my package shape.

Thanks

Answer 1

如果要检查对象是否是某个类的实例，请使用instanceOf运算符，而isInstance方法需要类的实例。

  if( temp[x][y] instanceOf shapes.cTriangle) {//dosomething }

Answer 2

That is not how isInstance(Object) works. You have to call it on a class and pass in the object you want to match. You would do:

shapes.cTriangle.class.isInstance(temp[x][y]);

assuming cTriangle is a class and temp[x][y] returns an object and you want to check if that object is of type cTriangle .