работа первая java

package Lab1;

public class Dog {
    private String name;
    private int age;
    public Dog(String n, int a){
        name = n;
        age = a;
    }
    public Dog(String n){
        name = n;
        age = 0;
    }
    public Dog(){
        name = "Sam";
        age = 0;
    }
    public void setAge(int age){
        this.age = age;
    }
    public void setName(String name){
        this.name = name;
    }
    public String getName(String name){
        return name;
    }
    public String toString(){
        return this.name + ", age " + this.age;
    }
    public void intoHumanAge(){
        System.out.println(name+"'s age in human years is " + age * 7 + " years");
    }
}


package Lab1;

public class TestDog {
    public static void main(String[] args){
        Dog d1 = new Dog("Mike", 2);
        Dog d2 = new Dog("Helen", 7);
        Dog d3 = new Dog("Bob"); d3.setAge(1);
        System.out.println(d1);
        d1.intoHumanAge();
        d2.intoHumanAge();
        d3.intoHumanAge();
    }
}


package Lab1;
public class Ball {
    private String type;
    private String color;
    public Ball(String t, String c){
        type = t;
        color = c;
    }
    public Ball(String c){
        type = "Volleyball";
        color = c;
    }
    public Ball(){
        type = "Football";
        color = "blue";
    }
    public void setColor(String color){
        this.color = color;
    }
    public void setType(String type){
        this.type = type;
    }
    public String toString(){
        return "The " + this.type + " is " + this.color + " color";
    }
    public void showStatus(){
        System.out.println("The " + type + " is " + color + " color");
    }
}


package Lab1;

public class TestBall {
    public static void main(String[] args){
        Ball b1 = new Ball("Basketball", "Orange");
        Ball b2 = new Ball("Blue");
        Ball b3 = new Ball("Rugby", "Yellow");
        b2.setType("Volleyball");
        b1.showStatus();
        b2.showStatus();
        b3.showStatus();

    }
}


package Lab1;

public class Book {
    private String name;
    private int pages;
    public Book(String n, int p){
        name = n;
        pages = p;
    }
    public Book(String n){
        name = n;
        pages = 1;
    }
    public Book(){
        name = "Alphabet";
        pages = 1;
    }
    public void setPages(int pages){
        this.pages = pages;
    }
    public void setName(String name){
        this.name = name;
    }
    public String getName(String name){
        return name;
    }
    public String toString(){
        return "In " + this.name + " " + this.pages + " pages";
    }
    public void howManySheets(){
        System.out.println("In " + name + " " + (pages / 2) + " sheets");
    }
}


package Lab1;

public class TestBook {
    public static void main(String[] args) {
        Book b1 = new Book("Kolobok", 30);
        Book b2 = new Book("Harry Potter");
        Book b3 = new Book("Iron Man", 100);
        b2.setPages(346);
        System.out.println(b1);
        b1.howManySheets();
        b2.howManySheets();
        b3.howManySheets();
    }
}