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Implementation of abstract class in Java
Write a Java program to demonstrate the implementation of abstract class.
Java abstract class and method
import java.util.*;
abstract class BaseClass
{
public abstract void disp();
}
class DerivedClass_1 extends BaseClass
{
public void disp()
{
System.out.println("This is Derived Class 1");
}
}
class DerivedClass_2 extends BaseClass
{
public void disp()
{
System.out.println("This is Derived Class 2");
}
}
class Demo
{
public static void main(String[] args)
{
DerivedClass_1 d1 = new DerivedClass_1();
DerivedClass_2 d2 = new DerivedClass_2();
d1.disp();
d2.disp();
}
}
Output

PRACTICALS/PRACTICE PROGRAM IN Java
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