Frequent question: What is the code of calculator in Java?

result = number1 * number2; System. out. println(number + ” * ” + number2 + ” = ” + result); break; These statements compute the product of two numbers and print the output.

How do you make a calculator with AWT in Java?

LOGIC PART

  1. FOR NUMERIC BUTTON. if(e. getSource()==b1){ //b1 for number 1 zt=l1. …
  2. FOR AIRTHMETIC BUTTON. if(e. getSource()==badd){ //FOR ADDITION num1=Double. …
  3. FOR EQUALS BUTTON. if(e. getSource()==bcalc){ num2=Double. …
  4. FOR CLEAR BUTTON. if(e. …
  5. FOR BACKSPACE BUTTON.

What is panel in Java?

Panel is the simplest container class. A panel provides space in which an application can attach any other component, including other panels. The default layout manager for a panel is the FlowLayout layout manager.

How is event handling done in Java?

Event Handling is the mechanism that controls the event and decides what should happen if an event occurs. This mechanism have the code which is known as event handler that is executed when an event occurs. Java Uses the Delegation Event Model to handle the events.

How do you create a calculator in Java?

Example: Simple Calculator using Java switch Statement

  1. Output 1. …
  2. Output 2 Choose an operator: +, -, *, or / + Enter first number 21 Enter second number 8 21.0 + 8.0 = 29.0.
  3. Output 3 Choose an operator: +, -, *, or / – Enter first number 9 Enter second number 3 9.0 – 3.0 = 6.0.
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How do I create a calculator in HTML?

Example of Calculator using HTML.

What is a frame in Java?

In Java, a frame is a window that has nice borders, various buttons along the top border, and other features. What you usually call a “window” Java calls a “frame”. A frame is a container object, so GUI components can be placed in it. … GUI application programs are usually organized around one or more frames.

What is label Java?

A Label object is a component for placing text in a container. A label displays a single line of read-only text. The text can be changed by the application, but a user cannot edit it directly.

What is dialog box in Java?

A dialog box is a GUI object in which you can place messages that you want to display on the screen. … The showMessageDialog() method that is part of the JOptionPane class.

Where can event handling code be written?

We can put the event handling code into one of the following places: Within class. Other class. Anonymous class.

What do you mean by polymorphism in Java?

Polymorphism in Java is the ability of an object to take many forms. To simply put, polymorphism in java allows us to perform the same action in many different ways.

What is popup menu in Java?

A popup menu is a free-floating menu which associates with an underlying component. This component is called the invoker. Most of the time, popup menu is linked to a specific component to display context-sensitive choices. In order to create a popup menu, you use the class JPopupMenu.