I don't understand why not work. If I don't put "else { return null; }" at the end I get missing return statement error.
package com.codegym.task.task06.task0621;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/*
Cat relations
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String grandFatherName = reader.readLine();
Cat catGrandFather = new Cat(grandFatherName);
String grandMotherName = reader.readLine();
Cat catGrandmother = new Cat(grandMotherName);
String fatherName = reader.readLine();
Cat catFather = new Cat(fatherName, catGrandFather, true);
String motherName = reader.readLine();
Cat catMother = new Cat(motherName, catGrandmother, false);
String daughterName = reader.readLine();
Cat catDaughter = new Cat(daughterName, catMother, catFather);
String sonName = reader.readLine();
Cat catSon = new Cat(sonName, catMother, catFather);
System.out.println(catMother);
System.out.println(catDaughter);
System.out.println(catFather);
System.out.println(catSon);
System.out.println(catGrandmother);
System.out.println(catGrandFather);
}
public static class Cat {
private String name;
private Cat parent;
private Cat parent2;
private boolean parentSex;
Cat(String name) {
this.name = name;
}
Cat(String name, Cat parent, boolean parentSex) {
this.name = name;
this.parent = parent;
this.parentSex = parentSex;
}
Cat(String name, Cat parent, Cat parent2){
this.name = name;
this.parent = parent;
this.parent2 = parent2;
}
@Override
public String toString() {
if (parent == null)
return "The cat's name is " + name + ", no mother ";
else if (parent != null && parentSex == false)
return "The cat's name is " + name + ", " + parent.name + " is the mother";
else if (parent != null && parentSex == true)
return "The cat's name is " + name + ", " + parent.name + " is the father";
else if (parent != null && parent2 != null)
return "The cat's name is " + name + ", " + parent.name + " is the mother, " + parent2.name + " is the father";
else {
return null;
}
}
}
}