Compiles and prints correctly

Question about the task

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I'm not certain what I'm doing wrong here. The code has no errors while compiling, and correctly prints the names and ages of the associated dog objects. Note: It also fails to pass when I change the "return this.name;" and "return this.age" statements to "return name;" and "return age;" so that's not the reason why it's failing either.

package com.codegym.task.task05.task0503; /* Getters and setters for the Dog class */ public class Dog { //write your code here String name; int age; public void setName(String name) { this.name = name; } public void setAge(int age) { this.age = age; } public String getName(Dog d) { return name; } public int getAge(Dog d) { return age; } public static void main(String[] args) { Dog dog1 = new Dog(); dog1.setName("Disco"); dog1.setAge(5); Dog dog2 = new Dog(); dog2.setName("Bongo"); dog2.setAge(8); System.out.println(dog1.getName(dog1)); System.out.println(dog1.getAge(dog1)); System.out.println(dog2.getName(dog2)); System.out.println(dog2.getAge(dog2)); } }

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Girish Patel

Level 8 , Hyderabad, India

18 September 2019, 10:31

Hey Amigo! Firstly you need to learn more about getters and also its syntex. In getters, there is no need to pass any parameters because here we are us getters only to get the value. And one more thing getters always provide current calling object variable value. So no need to pass object also in Parameter. Exe. your getters public int getAge(Dog d) { return age; } Right getters public int getAge() { return age; }

Laxman

Level 11 , indore, india

25 July 2019, 15:59

public class Dog { String name; int age; public void setName(String s) { this.name = s; } public void setAge(int a) { this.age = a; } public String getName() { return this.name; } public int getAge() { return this.age; } public static void main(String[] args) { Dog d1 = new Dog(); Dog d2 = new Dog(); d1.setName("priya"); d1.setAge(12); d2.setName("ramu"); d2.setAge(13); System.out.println(d1.getName()); System.out.println(d1.getAge()); System.out.println(d2.getName()); System.out.println(d2.getAge()); } }

Guadalupe Gagnon

Level 37 , Tampa, United States

28 March 2019, 05:12

Get rid of the parameters in the getters. For example code should be:

public int getAge(){
   return age;
}

Candice Brazil

Level 6 , Ocala, United States

28 March 2019, 11:10

When I do that I get 4 compile errors, for the get methods: com/codegym/task/task05/task0503/Dog.java:37: error: method getName in class com.codegym.task.task05.task0503.Dog cannot be applied to given types; System.out.println(dog1.getName(dog1)); ^ required: no arguments found: com.codegym.task.task05.task0503.Dog reason: actual and formal argument lists differ in length com/codegym/task/task05/task0503/Dog.java:38: error: method getAge in class com.codegym.task.task05.task0503.Dog cannot be applied to given types; System.out.println(dog1.getAge(dog1)); ^ required: no arguments found: com.codegym.task.task05.task0503.Dog reason: actual and formal argument lists differ in length com/codegym/task/task05/task0503/Dog.java:39: error: method getName in class com.codegym.task.task05.task0503.Dog cannot be applied to given types; System.out.println(dog1.getName(dog2)); ^ required: no arguments found: com.codegym.task.task05.task0503.Dog reason: actual and formal argument lists differ in length com/codegym/task/task05/task0503/Dog.java:40: error: method getAge in class com.codegym.task.task05.task0503.Dog cannot be applied to given types; System.out.println(dog1.getAge(dog2)); ^ required: no arguments found: com.codegym.task.task05.task0503.Dog reason: actual and formal argument lists differ in length

Candice Brazil

Level 6 , Ocala, United States

28 March 2019, 11:16

NVM, figured it out. I needed to remove dog1 and dog2 from within the parenthesis, since there are no inputs to the method anymore. If you can please explain the logic behind why my code worked, but didn't fulfill the requirements for this part. I'm still a little hazy on the logic.

Guadalupe Gagnon

Level 37 , Tampa, United States

28 March 2019, 13:54

This task isn't asking for outputs, which would be what was tested if that were the case, you can actually clear out the main method and still pass. This task is testing for exact method signatures that a) set the class variables name and age; and b) get those same variables. Method signatures consist of: 1) the method name (such as 'getAge') 2) and the parameters (in your above code the '(Dog dog)' part was the parameter) (also access level, static or not, and return type are considered... but 'method signature' refers to those 2) When you consider these two, your task was not verifying because the method signature did not match what the verification system was expecting, in the case of the getter methods the correct name with no parameters. It is important to remember method signatures because you can have methods that have the same exact name but different parameters, and the code will compile and work just fine. Here is a quick example of valid code where the methods have the same name but different parameters:

public int min(int a, int b) {
        return a < b ? a : b;
}
public int min(int a, int b, int c) {
        return min(a, min(b,c));
}
public int min(int a, int b, int c, int d) {
        return min(min(a,d), min(b,c));
}
etc.....

In this code the computer will know which one to use on how you call it, so if you use min(1,2) it will call the one with 2 parameters. min(1,2,3) will call the one with 3 parameters. min(dog1) will fail because there is no method above called min that excepts one Dog as an argument. You could make one, for example, that took 2 dogs as arguments and returns the lower age.

Candice Brazil

Level 6 , Ocala, United States

28 March 2019, 14:47

Thank you so much for taking the time to explain!