if(a instanceof A)
System.out.println("a
is instance of A");
if(b instanceof B)
System.out.println("b
is instance of B");
if(c instanceof C)
System.out.println("c
is instance of C");
if(c instanceof A)
System.out.println("c
can be cast to A");
if(a instanceof C)
System.out.println("a can be cast to C");
System.out.println();
// compare types of derived types
A ob;
ob = d; // A reference to d
System.out.println("ob now refers to d");
if(ob instanceof D)
System.out.println("ob is instance of D");
System.out.println();
ob = c; // A reference to c
System.out.println("ob now refers to c");
if(ob instanceof D)
System.out.println("ob can be cast to D");
else
System.out.println("ob cannot be cast to D");
if(ob instanceof A)
System.out.println("ob can be cast to A");
System.out.println();
// all objects can be cast to Object
if(a instanceof Object)
System.out.println("a may be cast to
Object");
if(b instanceof Object)
System.out.println("b may be cast to
Object");
if(c instanceof Object)
System.out.println("c may be cast to
Object");
if(d instanceof Object)
System.out.println("d may be cast to
Object");
}
}
The output from this program is shown here:
a is instance of A
b is instance of B
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