Answer Happy

public class Animal {private String name;private int birthYear;private double weight;private char gender;public Animal() { name = ""; birthYear = 1900; weight = 0.0; gender = 'u'; }public Animal(String name, int birthYear, double weight, char gender) { this.name = name; this.birthYear = birthYear; this.weight = weight; this.gender = gender;}
public String getName() { return name; }
public void setName(String name) {this.name = name;}
public int getBirthYear() {return birthYear;}
public void setBirthYear(int birthYear) {this.birthYear = birthYear;}
public double getWeight() {return weight;}
public void setWeight(double weight) {if (weight >= 0)this.weight = weight;else this.weight = -1;}
public char getGender() {return gender;}
public void setGender(char gender) {if (gender == 'm' || gender == 'f')this.gender = gender;else this.gender = 'u';}
public int calculateAge(int year) {if (year < birthYear) return -1;return year - birthYear;}
public boolean isMale() {return gender == 'm';}
public boolean isFemale() {return !isMale();}
public void printDetails() {System.out.printf("Name:%20s | Year of Birth: %d | Weight: %10.2f | Gender: %c\n",getName(), getBirthYear(), getWeight(), getGender());}
public void gainWeight() {weight += 1;}
public void gainWeight(double weight) {if (weight > 0) this.weight += weight;}
public void loseWeight() {weight -= 1;if (weight < 0) weight = 0;}
public void loseWeight(double weight) {this.weight -= weight;if (this.weight < 0) this.weight = 0;}
@Override
public String toString() {return this.getName() + ", Year Born: " + getBirthYear() + ", Weight: " + getWeight() + ", Gender: " + getGender();}}
public class Driver {
public static void main(String[] args) { Farm f1 = new Farm(10);
Animal a1 = new Animal("cow", 2012, 100.5, 'f'); Animal a2 = new Animal("pig", 2009, 550.5, 'm'); Animal a3 = new Animal("donkey", 1999, 773.42, 'm'); Animal a4 = new Animal("sheep", 2016, 164.23, 'f'); Animal a5 = new Animal("goose", 2004, 10.75, 'f');
f1.addAnimal(a1); f1.addAnimal(a2); f1.addAnimal(a3); f1.addAnimal(a4); f1.addAnimal(a5);
f1.printAllDetails(); }}
PLEASE HELP FIX THESE ERRORS:
ERROR: Couldn't correctly retrieve attributes of an Animal object created with invalid weight
ERROR: Couldn't correctly retrieve attributes of an Animal object created with invalid gender