no access to instance method of an object as a class variable

Question

package com.company;

public class UnlimitedBuffer {
//Variabels
public Object object;  

//Constructor
public UnlimitedBuffer(ObjectBufferRing object){
    this.object = object;
}

//Methods
public static void main(String[] args){
    ObjectBufferRing obr = new ObjectBufferRing(10); //Object of another Class "ObjectBufferRing"
    UnlimitedBuffer ubr = new UnlimitedBuffer(obr); 
    ubr.object.printArray();

}

Im to trying to access to an instance method "printArray()" of the object "object", which is saved as a class variable of another class object "ubr". But unfortunately it doesn't find the instance method "printArray()" or any other class members (variables/methods) of this object. (both classes are in the same package) Instead, i get this error output:

java: cannot find symbol

symbol: method printArray()

location: variable object of type java.lang.Object

Answer 1

You told Java to forget that object was an ObjectBufferRing with a printArray method, when you write public Object object; instead of public ObjectBufferRing object; .

Java's doing what you told it to.