public class Test{    public static void main(String[] args)    {        Human aPerson = new Human(160);        System.out.println(aPerson.getHeight());        aPerson.growHeight(170);        System.out.println(aPerson.getHeight());        aPerson.repeatBreath(100);    }}class Human{    /**     * constructor     */    public Human(int h)    {        this.height = h;        System.out.println("I‘m born");    }    /**     * accessor     */    public int getHeight()    {       return this.height;    }    /**     * mutator     */    public void growHeight(int h)    {        this.height = this.height + h;    }     /**      * encapsulated, for internal use      */    private void breath()    {        System.out.println("hu...hu...");    }   /**    * call breath()    */    public void repeatBreath(int rep)    {        int i;        for(i = 0; i < rep; i++) {            this.breath();        }    }    private int height; // encapsulated, for internal use}

package text;interface Cup{    void addWater(int w);    void drinkWater(int w);}class Text implements Cup{    public void addWater(int w)    {        this.water = this.water + w;        System.out.println(water);    }        public void drinkWater(int w)    {        this.water = this.water - w;        System.out.println(water);    }        public int waterContent( )    {        return this.water;    }        public void play( )    {        System.out.println("la...la...");    }        private int water = 0;        public static void main(String args[ ])    {        Text obj = new Text( );        obj.addWater(10);        obj.drinkWater(4);    }}

package text;public class Text{    public static void main(String[] args)    {        Torch aTorch = new Torch( );        System.out.println("Charge: 2 hours");        aTorch.charge(2);        System.out.println("First Turn On: 3 hours");        aTorch.turnOn(3);        System.out.println("Second Turn On:  3 hours");        aTorch.turnOn(3);    }}class Battery {    public void chargeBattery(double p)    {        if (this.power < 1.)        {            this.power = this.power + p;        }    }        public boolean useBattery(double p)    {        if (this.power >= p)        {            this.power = this.power - p;            return true;        }        else        {            this.power = 0.0;            return false;        }    }        private double power = 0.0;}class Torch{    /**     *  10% power per hour use     *   warning when out of power     */    public void turnOn(int hours)    {        boolean usable;        usable = this.theBattery.useBattery(hours*0.1);        if ( usable != true )        {            System.out.println("No more usable, must charge");        }    }        /**     *  20% power per hour charge     */    public void charge(int hours)    {        this.theBattery.chargeBattery(hours*0.2);            }        /**     *  composition     */    private Battery theBattery = new Battery();}

package test;public class Test {    public static void main(String[ ] args)    {        System.out.println("hello world");        Woman aWoman = new Woman();        aWoman.growHeight(120);        System.out.println(aWoman.getHeight());        aWoman.breath();        aWoman.giveBirth();    }}class Human{    /**     * contructor     */    public Human(int height)    {        this.height = height;    }        public Human()    {    }         /**      * accessor      */    public int getHeight()    {        return this.height;    }    /**     *    * mutator     */    public void growHeight(int h)    {        this.height = this.height + h;        }    /**    * breath    */    public void breath()    {        System.out.println("hu...hu...");    }    private int height; }class Woman extends Human{        /**     * constructor     */    public Woman(int h)    {        super(h); //base class construtor        System.out.println("Hello, Pandora!");    }        public Woman()    {    }        /**     *  new method     */    public Human giveBirth()    {            System.out.println("Give birth");        return (new Human(20));    }        /**     * override Human.breath( )     */    public  void breath()    {        super.breath( );        System.out.println("su...");    }}

package test;public class Test {    public static void main(String[ ] args)    {        System.out.println(Human.getPopulation());        Human aPerson = new Human(160);        System.out.println(aPerson.getPopulation());    }}class Human{       /**     * constructor     */    public Human(int h)    {        this.height = h;        Human.population = Human.population +1;    }    /**     * accessor     */    public int getHeight()    {       return this.height;    }    /**     * mutator     */    public void growHeight(int h)    {        this.height = this.height + h;    }    /**     * breath     */    public void breath()    {        System.out.println("hu...hu...");    }    private int height;     /*     * static method, access population     */    public static int getPopulation()    {        return Human.population;    }    private static int population;    private static boolean is_mammal = true;}

package test;public class Test{    public static void main(String[] args)        {             Human aPerson = new Human(160);             Human dummyPerson = aPerson;             System.out.println(dummyPerson.getHeight());             aPerson.growHeight(20);             System.out.println(dummyPerson.getHeight());        }}class Human{       /**     * constructor     */    public Human(int h)    {        this.height = h;    }    /**     * accessor     */    public int getHeight()    {       return this.height;    }    /**     * mutator     */    public void growHeight(int h)    {        this.height = this.height + h;    }    private int height;}