Olgu olemas liides Pindalaline: public interface Pindalaline {
double pindala();
} Millised järgmistest variantidest on korrektsed?

Question

Olgu olemas liides Pindalaline: public interface Pindalaline { 
     double pindala(); 
 } Millised järgmistest  variantidest  on korrektsed?

Answer

public abstract class Ring extends Pindalaline { 
     private int raadius; 
 }

Answer

public class Ring extends Pindalaline { 
     private int raadius; 
     public double pindala(){ 
         return Math.PI * raadius * raadius; 
     } 
 }

Answer

public abstract class Ring implements Pindalaline { 
     private int raadius; 
 }

Answer

public class Ring implements Pindalaline { 
     private int raadius; 
     public double pindala(){ 
         return Math.PI * raadius * raadius; 
     } 
 }

Answer

public interface Ring implements Pindalaline { 
     int raadius; 
     double pindala(); 
 }

Answer

public class Ring implements Pindalaline { 
     private int raadius; 
     public double pindala(); 
 }

Answer

public class Ring implements Pindalaline { 
     private int raadius; 
 }

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Olgu olemas liides Pindalaline: public interface Pindalaline { double pind...

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