Windows on the desktop are just one of many objects used in a graphical user interface (GUI)-- buttons, drop-down list boxes, pop-up menus, are just some of the many others. Regardless of their particular appearance, tasks, and structure, all such GUI components share some common functionality-- which is handled in a manner unique to the actual component .
Define an interface, GUIComponent, with the following methods :
onClick-- void-returning and accepts a single integer parameter
onCursorFocus -- void-returning and accepts a single integer parameter
move -- 3 overloaded methods : all boolean -returning; one accepts a pair of integer parameters ; the second a single parameter of type Position; the third a single parameter of type Dimension
resize-- boolean -returning and accepts a pair of integer parameters
import java.awt.*;
import java.awt.event.*;
/*********************************************/
public category MyCalculator extends Frame
mathematician setClear=true;
double variety, memValue;
char op;
String digitButtonText[] = ;
String operatorButtonText[] = ;
String memoryButtonText[] = ;
String specialButtonText[] = ;
MyDigitButton digitButton[]=new
MyDigitButton[digitButtonText.length];
MyOperatorButton operatorButton[]=new
MyOperatorButton[operatorButtonText.length];
MyMemoryButton memoryButton[]=new
MyMemoryButton[memoryButtonText.length];
MySpecialButton specialButton[]=new
MySpecialButton[specialButtonText.length];
Label displayLabel=new Label("0",Label.RIGHT);
Label memLabel=new Label(" ",Label.RIGHT);
final int FRAME_WIDTH=325,FRAME_HEIGHT=325;
final int HEIGHT=30, WIDTH=30, H_SPACE=10,V_SPACE=10;
final int TOPX=30, TOPY=50;
///////////////////////////
MyCalculator(String frameText)//constructor
//set Co-ordinates for Special Buttons
tempX=TOPX+1*(WIDTH+H_SPACE); y=TOPY+1*(HEIGHT+V_SPACE);
for(int i=0;i<specialButton.length;i++)
//set Co-ordinates for Digit Buttons
int digitX=TOPX+WIDTH+H_SPACE;
int digitY=TOPY+2*(HEIGHT+V_SPACE);
tempX=digitX; y=digitY;
for(int i=0;i<digitButton.length;i++)
}
//set Co-ordinates for Operator Buttons
int opsX=digitX+2*(WIDTH+H_SPACE)+H_SPACE;
int opsY=digitY;
tempX=opsX; y=opsY;
for(int i=0;i<operatorButton.length;i++)
}
addWindowListener(new WindowAdapter()
});
setLayout(null);
setSize(FRAME_WIDTH,FRAME_HEIGHT);
setVisible(true);
}
//////////////////////////////////
static String getFormattedText(double temp)
////////////////////////////////////////////////
static mathematician isInString(String s, char ch)
come true;
return false;
}
/////////////////////////////////////////////////
public void actionPerformed(ActionEvent ev)
catch(NumberFormatException e)
if (index==0 &&
cl.displayLabel.getText().equals("0")) return;
if(cl.setClear)
zero.");}
return;
}
if(opText.equals("sqrt"))
catch(ArithmeticException excp)
// method = button ironed
switch(cl.op)
catch(ArithmeticException excp)
Windows on the desktop are just one of many objects used in a graphical user interface...
REQUIREMENTS: Write a Graphical User Interface (GUI) program using JavaFX that prompts the user to enter a credit card number. Display whether the number is valid and the type of credit cards (i.e., Visa, MasterCard, American Express, Discover, and etc). The requirements for this assignment are listed below: • Create a class (CreditNumberValidator) that contains these methods: // Return true if the card number is valid. Boolean isValid(String cardNumber); // Get result from Step 2. int sumOfDoubleEvenPlace(String cardNumber); // Return...
//*Manager.java*//
public interface Manager {
public void handleCrisis();
}
_________________________________________________________
/**Employee.java**/
Public abstract class Employee {
protected final String name;
protected final int id;
public Employee(String empName, int empId) {
name = empName;
id = empId;
}
public Employee() {
name = generatedNames[lastGeneratedId];
id = lastGeneratedId++;
}
public String getName() {
return name;
}
public int getId() {
return id;
}
//returns true if work was successful. otherwise returns false (crisis)
public abstract boolean work();
public String toString() {
return...
Rational Number *In Java* A rational number is one that can be expressed as the ratio of two integers, i.e., a number that can be expressed using a fraction whose numerator and denominator are integers. Examples of rational numbers are 1/2, 3/4 and 2/1. Rational numbers are thus no more than the fractions you've been familiar with since grade school. Rational numbers can be negated, inverted, added, subtracted, multiplied, and divided in the usual manner: The inverse, or reciprocal of...
Introduction In this final programming exercise, you'll get a chance to put together many of the techniques used during this semester while incorporating OOP techniques to develop a simple song playlist class. This playlist class allows a user to add, remove and display songs in a playlist. The Base Class, Derived Class and Test Client Unlike the other PAs you completed in zyLabs, for this PA you will be creating THREE Java files in IntelliJ to submit. You will need...
Wanted by the Police: A Good Interface By KATIE HAFNER NOV. 11, 2004 From: The New York Times, Technology section, not-for profit classroom used. SAN JOSE, Calif. - SAN JOSE has a reputation as one of the safest large cities in the nation, with the fewest police officers per capita. Yet a number of the 1,000 officers in this city of 925,000 in the heart of Silicon Valley have been worrying about their own safety of late. Since June, the...
JAVA :The following are descriptions of classes that you will create. Think of these as service providers. They provide a service to who ever want to use them. You will also write a TestClass with a main() method that fully exercises the classes that you create. To exercise a class, make some instances of the class, and call the methods of the class using these objects. Paste in the output from the test program that demonstrates your classes’ functionality. Testing...
I have Majority of the code written but I just need to implement
the <,>,and = sign in the code. I have posted the
instructions for the whole code. I will add what I have at the
end.
Objectives:
Implement basic class concepts in Java
Implement inheritance with super and sub-classes
Implement basic polymorphism concepts
Problem: The TARDIS has been infected by a virus which means it
is up to Doctor Who to manually enter calculations into the TARDIS
interface....
For this assignment, your job is to create a simple game called
Opoly.
The objectives of this assignment are to:
Break down a problem into smaller, easier problems.
Write Java methods that call upon other methods to accomplish
tasks.
Use a seed value to generate random a sequence of random
numbers.
Learn the coding practice of writing methods that perform a
specific task.
Opoly works this way: The board is a circular track of variable
length (the user determines the...
In this assignment you will implement software for your local library. The user of the software will be the librarian, who uses your program to issue library cards, check books out to patrons, check books back in, send out overdue notices, and open and close the library. class Calendar We need to deal with the passage of time, so we need to keep track of Java. Declare this variable as private int date within the class itself, not within any...
1 Overview For this assignment you are required to write a Java program that plays (n, k)-tic-tac-toe; (n, k)-tic- tac-toe is played on a board of size n x n and to win the game a player needs to put k symbols on adjacent positions of the same row, column, or diagonal. The program will play against a human opponent. You will be given code for displaying the gameboard on the screen. 2 The Algorithm for Playing (n, k)-Tic-Tac-Toe The...