//removes border
jButtonName.setBorder(BorderFactory.createEmptyBorder());
//removes content area

jButtonName.setContentAreaFilled(false);

//implementation
jButtonName.setRolloverIcon(rolloverIcon);

//declarations
static AudioClip audioname;

//to access the audioclip
try{
audioname = Applet.newAudioClip(new URL(“file:”+”audioname.wav”));
}
catch(Exception ex){
}

//to play the sound

audioname.play();

//to access the specified font attributes
jname.setFont(font);

//size of padding moves from top, left, bottom, right

String imgURL = “c:\….\Icon.ico”;

/*to access the logo, just replace the ‘mainWindow’ word below with the name of the frame*/

mainWindow.setIconImage(new ImageIcon(imgURL).getImage());

//repost from :  forums.sun.com

public class Main{

public static void main(String[] args)

{

System.out.println(“”);

//============================Person============================================
//calls the constructor from Person.java
//’new’ allocates the memory where Person object will be stored

Person person1 = new Person();
//start of code
person1.setName(“Francis John Agunday”);
//end of code

System.out.println(“person1.getName(): ” + person1.getName());
System.out.println(“”);

//=============================Student==========================================

Student student1 = new Student();

student1.setName(person1.getName());
student1.setSchool(“UP Diliman”);

System.out.println(“student1.getName() = ” + student1.getName());
System.out.println(“student1.getSchool() = ” + student1.getSchool());

System.out.println(“”);

//==============================InternationalStudent===========================
//calls the constructor from Person.java
//’new’ allocates the memory where InternationalStudent object will be stored

InternationalStudent internationalStudent1 = new InternationalStudent();

internationalStudent1.setName(person1.getName());
internationalStudent1.setSchool(student1.getSchool());
internationalStudent1.setCountry(“Philippines”);

System.out.println(“internationalStudent1.getName() = ” +
internationalStudent1.getName());
System.out.println(“internationalStudent1.getSchool() = ” +
internationalStudent1.getSchool());
System.out.println(“internationalStudent1.getCountry() = ” +
internationalStudent1.getCountry());

}
}
=============================================================================
PERSON CLASS
public class Person
{

private String name;
private String address;

public Person(){

}
//constructor;
public Person(String name){

this.name = name;

}

//method that gets instance variable Name
public String getName(){

return name;

}

//method that gets instance variable Name (overloading)
public String getName(String name){

return name;

}

//method that sets instance variable Name
//mutator method; changes a value
public void setName(String name){

this.name = name;

}

public String getAddress()
{

return address;

}

public void setAddress(String address)
{
address = “Quezon City”;
}

}
=============================================================================
STUDENT CLASS
//Student: subclass ; Person superclass
//Student class inherits from Person class

public class Student extends Person{

private String school;
private double grade;

public Student(){

}
//constructor for Student
public Student(String name, String school, double grade)
{
super(name);

this.school = school;
this.grade = grade;

}

public String getSchool(){

return school;

}

public void setSchool(String school){

this.school = school;

}

public double getGrade(){

return grade;

}

public void setGrade(double grade){

grade = 98.99;

}
}

=============================================================================
TEACHER CLASS

//Teacher: subclass ; Person superclass
//Teacher class inherits from Person class
public class Teacher extends Person{

//private will only be used within this class
private String subject;

public String getSubject(){

return subject;

}

public void setSubject(String subject){

subject = “Java Programming”;

}
}

=============================================================================
INTERNATIONAL STUDENT CLASS

//InternationalStudent: subclass ; Student superclass
//InternationalStudent class inherits from Student class
public class InternationalStudent extends Student{

private String country;

/** Creates a new instance of InternationalStudent */

public InternationalStudent(){

}
//constructor for InternationalStudent
public InternationalStudent(String name, String school, double grade, String country){

super(name, school, grade);
this.country = country;

}

public String getCountry(){

return country;

}

public void setCountry(String country){

this.country = country;

}

}

public class Main
{

public static void main(String[] args)
{

// Declare and create Product array of size 5
Product[]product = new Product[3];

product[0] = new Book(250, “UP Press”, 2001);
product[1] = new MP3Player(5000, “Apple”, “silver”);
product[2] = new TV(50000, “National Panasonic”, 20);

System.out.println(“”);
System.out.println(“”);

for(int index= 0; index Polymorphic Behavior”);
System.out.println(“”);

double totalSalePrice = 0;

//Polymorphic Behavior
for(int index= 0; index < product.length; index++)
{
totalSalePrice+=product[index].computeSalePrice();
}
System.out.println("totalSalePrice = " + totalSalePrice);
}

}
==============================================================================
PRODUCT CLASS

public class Product
{

private double regularPrice;

/** Creates a new instance of Product */
public Product(double regularPrice)
{
this.regularPrice = regularPrice;
}

// Method that will be overridden
public double computeSalePrice()
{
return 0;
}

public double getRegularPrice()
{
return regularPrice;
}

public void setRegularPrice(double regularPrice)
{
this.regularPrice = regularPrice;
}

}

==============================================================================
ELECTRONICS CLASS

public class Electronics extends Product{

private String manufacturer;

/** Creates a new instance of Electronics */
public Electronics(double regularPrice, String manufacturer)
{
super(regularPrice);
this.manufacturer = manufacturer;
}

// Override this method
public double computeSalePrice()
{
return super.getRegularPrice() * 0.6;
}

public String getManufacturer()
{
return manufacturer;
}

public void setManufacturer(String manufacturer) {
this.manufacturer = manufacturer;
}

}
==============================================================================
BOOK CLASS
public class Book extends Product
{

private String publisher;
private int yearPublished;

/** Creates a new instance of Book */
public Book(double regularPrice, String publisher, int yearPublished)
{
super(regularPrice);
this.publisher = publisher;
this.yearPublished = yearPublished;
}

// Override this method
public double computeSalePrice()
{
return super.getRegularPrice() * 0.5;
}

public String getPublisher()
{
return publisher;
}

public void setPublisher(String publisher)
{
this.publisher = publisher;
}

public int getYearPublished()
{
return yearPublished;
}

public void setYearPublished(int yearPublished)
{
this.yearPublished = yearPublished;
}

}

==============================================================================
TV CLASS

public class TV extends Electronics
{

int size;

/** Creates a new instance of TV */
public TV(double regularPrice, String manufacturer, int size)
{
super(regularPrice, manufacturer);
this.size = size;

}

// Override this method
public double computeSalePrice()
{
return super.getRegularPrice() * 0.8;
}
}
==============================================================================
MP3PLAYER CLSS

public class MP3Player extends Electronics
{

private String color;

/**
* Creates a new instance of MP3Player
*/
public MP3Player(double regularPrice, String manufacturer, String color)
{
super(regularPrice, manufacturer);
this.color = color;
}

// Override this method
public double computeSalePrice()
{
return super.getRegularPrice() * 0.9;
}

public String getColor()
{
return color;
}

public void setColor(String color)
{
this.color=color;
}
}

==============================================================================

String instanceVariable;
VariableTypes(){
instanceVariable = “this is an instance variable”;
}

public static void main(String []args){

String localVariable = “this is a local variable”;

VariableTypes insVar = new VariableTypes();

System.out.println(“staticVariable: ” + staticVariable);
System.out.println(“instanceVariable: ” + insVar.instanceVariable);
System.out.println(“localVariable: ” + localVariable);
}
}

a. Modify ObjectAndClass.java
b. Create another object instance of Long class using new keyword.
c. Display it using System.out.println().
d. Compile and run.

Set 2.
a. Compile StaticAndInstance.java
b. Kindly the describe the problem with the code.
c. Explain each statement in the code (line by line).

Set 3.
a. Compile VariableTypes.java.
b. how can you resolve the issue with the instance variable.
c. Submit the correct code.