java-program/JavaPracticeQuestionsonAbstractClassesAndnterfaces.java at master · Ashvin0740/java-program · GitHub

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abstractclassPen{
abstractvoidwrite();
abstractvoidrefill();
}

classFountainPenextendsPen {
voidwrite(){
System.out.println("Write");
 }
voidrefill() {
System.out.println("refill");
 }
voidchangeNib(){
System.out.println("Changing the nib");
 }
}

classMonkey{
voidjump(){
System.out.println("Jumping...");
 }
voidbite(){
System.out.println("Biting...");
 }

}
interfaceBasicAnimal{
voideat();
voidsleep();
}

classHumanextendsMonkeyimplementsBasicAnimal{
voidspeak(){
System.out.println("Hello sir!");
 }
@Override
publicvoideat() {
System.out.println("Eating");
 }
@Override
publicvoidsleep() {
System.out.println("Sleeping");
 }

}


classJavaPracticeQuestionsonAbstractClassesAndnterfaces{
publicstaticvoidmain(String[] args) {
FountainPenpen = newFountainPen();
pen.changeNib();

// Q3
HumanAshvin = newHuman();
Ashvin.sleep();
// Q5
Monkeym1 = newHuman();
m1.jump();
m1.bite();
// m1.speak(); --> Cannot use speak method because the reference is monkey which does not have speak method

BasicAnimallovish = newHuman();
// lovish.speak(); --> error
lovish.eat();
lovish.sleep();

 }
}
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abstractclassPen{
abstractvoidwrite();
abstractvoidrefill();
}

classFountainPenextendsPen {
voidwrite(){
System.out.println("Write");
 }
voidrefill() {
System.out.println("refill");
 }
voidchangeNib(){
System.out.println("Changing the nib");
 }
}

classMonkey{
voidjump(){
System.out.println("Jumping...");
 }
voidbite(){
System.out.println("Biting...");
 }

}
interfaceBasicAnimal{
voideat();
voidsleep();
}

classHumanextendsMonkeyimplementsBasicAnimal{
voidspeak(){
System.out.println("Hello sir!");
 }
@Override
publicvoideat() {
System.out.println("Eating");
 }
@Override
publicvoidsleep() {
System.out.println("Sleeping");
 }

}


classJavaPracticeQuestionsonAbstractClassesAndnterfaces{
publicstaticvoidmain(String[] args) {
FountainPenpen = newFountainPen();
pen.changeNib();

// Q3
HumanAshvin = newHuman();
Ashvin.sleep();
// Q5
Monkeym1 = newHuman();
m1.jump();
m1.bite();
// m1.speak(); --> Cannot use speak method because the reference is monkey which does not have speak method

BasicAnimallovish = newHuman();
// lovish.speak(); --> error
lovish.eat();
lovish.sleep();

 }
}
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abstractclassPen{
abstractvoidwrite();
abstractvoidrefill();
}

classFountainPenextendsPen {
voidwrite(){
System.out.println("Write");
 }
voidrefill() {
System.out.println("refill");
 }
voidchangeNib(){
System.out.println("Changing the nib");
 }
}

classMonkey{
voidjump(){
System.out.println("Jumping...");
 }
voidbite(){
System.out.println("Biting...");
 }

}
interfaceBasicAnimal{
voideat();
voidsleep();
}

classHumanextendsMonkeyimplementsBasicAnimal{
voidspeak(){
System.out.println("Hello sir!");
 }
@Override
publicvoideat() {
System.out.println("Eating");
 }
@Override
publicvoidsleep() {
System.out.println("Sleeping");
 }

}


classJavaPracticeQuestionsonAbstractClassesAndnterfaces{
publicstaticvoidmain(String[] args) {
FountainPenpen = newFountainPen();
pen.changeNib();

// Q3
HumanAshvin = newHuman();
Ashvin.sleep();
// Q5
Monkeym1 = newHuman();
m1.jump();
m1.bite();
// m1.speak(); --> Cannot use speak method because the reference is monkey which does not have speak method

BasicAnimallovish = newHuman();
// lovish.speak(); --> error
lovish.eat();
lovish.sleep();

 }
}
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abstractclassPen{
abstractvoidwrite();
abstractvoidrefill();
}

classFountainPenextendsPen {
voidwrite(){
System.out.println("Write");
 }
voidrefill() {
System.out.println("refill");
 }
voidchangeNib(){
System.out.println("Changing the nib");
 }
}

classMonkey{
voidjump(){
System.out.println("Jumping...");
 }
voidbite(){
System.out.println("Biting...");
 }

}
interfaceBasicAnimal{
voideat();
voidsleep();
}

classHumanextendsMonkeyimplementsBasicAnimal{
voidspeak(){
System.out.println("Hello sir!");
 }
@Override
publicvoideat() {
System.out.println("Eating");
 }
@Override
publicvoidsleep() {
System.out.println("Sleeping");
 }

}


classJavaPracticeQuestionsonAbstractClassesAndnterfaces{
publicstaticvoidmain(String[] args) {
FountainPenpen = newFountainPen();
pen.changeNib();

// Q3
HumanAshvin = newHuman();
Ashvin.sleep();
// Q5
Monkeym1 = newHuman();
m1.jump();
m1.bite();
// m1.speak(); --> Cannot use speak method because the reference is monkey which does not have speak method

BasicAnimallovish = newHuman();
// lovish.speak(); --> error
lovish.eat();
lovish.sleep();

 }
}
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abstractclassPen{
abstractvoidwrite();
abstractvoidrefill();
}

classFountainPenextendsPen {
voidwrite(){
System.out.println("Write");
 }
voidrefill() {
System.out.println("refill");
 }
voidchangeNib(){
System.out.println("Changing the nib");
 }
}

classMonkey{
voidjump(){
System.out.println("Jumping...");
 }
voidbite(){
System.out.println("Biting...");
 }

}
interfaceBasicAnimal{
voideat();
voidsleep();
}

classHumanextendsMonkeyimplementsBasicAnimal{
voidspeak(){
System.out.println("Hello sir!");
 }
@Override
publicvoideat() {
System.out.println("Eating");
 }
@Override
publicvoidsleep() {
System.out.println("Sleeping");
 }

}


classJavaPracticeQuestionsonAbstractClassesAndnterfaces{
publicstaticvoidmain(String[] args) {
FountainPenpen = newFountainPen();
pen.changeNib();

// Q3
HumanAshvin = newHuman();
Ashvin.sleep();
// Q5
Monkeym1 = newHuman();
m1.jump();
m1.bite();
// m1.speak(); --> Cannot use speak method because the reference is monkey which does not have speak method

BasicAnimallovish = newHuman();
// lovish.speak(); --> error
lovish.eat();
lovish.sleep();

 }
}
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abstractclassPen{
abstractvoidwrite();
abstractvoidrefill();
}

classFountainPenextendsPen {
voidwrite(){
System.out.println("Write");
 }
voidrefill() {
System.out.println("refill");
 }
voidchangeNib(){
System.out.println("Changing the nib");
 }
}

classMonkey{
voidjump(){
System.out.println("Jumping...");
 }
voidbite(){
System.out.println("Biting...");
 }

}
interfaceBasicAnimal{
voideat();
voidsleep();
}

classHumanextendsMonkeyimplementsBasicAnimal{
voidspeak(){
System.out.println("Hello sir!");
 }
@Override
publicvoideat() {
System.out.println("Eating");
 }
@Override
publicvoidsleep() {
System.out.println("Sleeping");
 }

}


classJavaPracticeQuestionsonAbstractClassesAndnterfaces{
publicstaticvoidmain(String[] args) {
FountainPenpen = newFountainPen();
pen.changeNib();

// Q3
HumanAshvin = newHuman();
Ashvin.sleep();
// Q5
Monkeym1 = newHuman();
m1.jump();
m1.bite();
// m1.speak(); --> Cannot use speak method because the reference is monkey which does not have speak method

BasicAnimallovish = newHuman();
// lovish.speak(); --> error
lovish.eat();
lovish.sleep();

 }
}
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abstractclassPen{
abstractvoidwrite();
abstractvoidrefill();
}

classFountainPenextendsPen {
voidwrite(){
System.out.println("Write");
 }
voidrefill() {
System.out.println("refill");
 }
voidchangeNib(){
System.out.println("Changing the nib");
 }
}

classMonkey{
voidjump(){
System.out.println("Jumping...");
 }
voidbite(){
System.out.println("Biting...");
 }

}
interfaceBasicAnimal{
voideat();
voidsleep();
}

classHumanextendsMonkeyimplementsBasicAnimal{
voidspeak(){
System.out.println("Hello sir!");
 }
@Override
publicvoideat() {
System.out.println("Eating");
 }
@Override
publicvoidsleep() {
System.out.println("Sleeping");
 }

}


classJavaPracticeQuestionsonAbstractClassesAndnterfaces{
publicstaticvoidmain(String[] args) {
FountainPenpen = newFountainPen();
pen.changeNib();

// Q3
HumanAshvin = newHuman();
Ashvin.sleep();
// Q5
Monkeym1 = newHuman();
m1.jump();
m1.bite();
// m1.speak(); --> Cannot use speak method because the reference is monkey which does not have speak method

BasicAnimallovish = newHuman();
// lovish.speak(); --> error
lovish.eat();
lovish.sleep();

 }
}
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abstractclassPen{
abstractvoidwrite();
abstractvoidrefill();
}

classFountainPenextendsPen {
voidwrite(){
System.out.println("Write");
 }
voidrefill() {
System.out.println("refill");
 }
voidchangeNib(){
System.out.println("Changing the nib");
 }
}

classMonkey{
voidjump(){
System.out.println("Jumping...");
 }
voidbite(){
System.out.println("Biting...");
 }

}
interfaceBasicAnimal{
voideat();
voidsleep();
}

classHumanextendsMonkeyimplementsBasicAnimal{
voidspeak(){
System.out.println("Hello sir!");
 }
@Override
publicvoideat() {
System.out.println("Eating");
 }
@Override
publicvoidsleep() {
System.out.println("Sleeping");
 }

}


classJavaPracticeQuestionsonAbstractClassesAndnterfaces{
publicstaticvoidmain(String[] args) {
FountainPenpen = newFountainPen();
pen.changeNib();

// Q3
HumanAshvin = newHuman();
Ashvin.sleep();
// Q5
Monkeym1 = newHuman();
m1.jump();
m1.bite();
// m1.speak(); --> Cannot use speak method because the reference is monkey which does not have speak method

BasicAnimallovish = newHuman();
// lovish.speak(); --> error
lovish.eat();
lovish.sleep();

 }
}