/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
	    Integer i1=1; // upper case Integer (not int), so it is an object
	    Object o1=i1; // setting Object to any object is okay
	    //Integer i2=o1; // this simply will not compile
	    Integer i2=(Integer)o1; // this will work fine
	    if(o1 instanceof Integer)
	      System.out.println("o1 is Integer: "+(Integer)o1*2);
	    if(o1 instanceof Double)
	      System.out.println("o1 is Double: "+(Double)o1*2);
	    System.out.println("passed the ifs");
	    Double d1=(Double)o1; // this will result in ClassCastException in runtime
	}
}

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