Tag: java awt program

Today in this java programming we will learn a Java Program to Create a Calculator Using AWT Controls(Abstract Window Toolkit). This will be a basic calculator with a user interface. The AWT components we will be using are Textfields, Buttons, and labels.

As we know a simple calculator requires two fields for input and one field to show the result of the operation performed on those two operands.

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Program to create Calculator in Java using AWT

Source Code:

import java.awt.*;
import java.awt.event.*;
 
class Calculator implements ActionListener
{
	//Declaring Objects
	Frame f = new Frame("Calculator AWT");
	Label l1 = new Label("First Number:");
	Label l2 = new Label("Second Number:");
	Label l3 = new Label("Result:");
	
	TextField t1 = new TextField();
	TextField t2 = new TextField();
	TextField t3 = new TextField();
	
	Button b1 = new Button("Add");
	Button b2 = new Button("Sub");
	Button b3 = new Button("Mul");
	Button b4 = new Button("Div");
	Button b5 = new Button("Quit");
	
	Calculator()
    {      
       //Background Color
       f.setBackground(Color.GRAY) ;

		//Giving Bounds for Labels
		l1.setBounds(50,100,100,20);
		l2.setBounds(50,140,100,20);
		l3.setBounds(50,180,100,20);
		
        //Giving Bounds for Labels
		t1.setBounds(200,100,100,20);
		t2.setBounds(200,140,100,20);
		t3.setBounds(200,180,100,20);
		
        //Giving Bounds for Labels
		b1.setBounds(50,230,50,20);
		b2.setBounds(110,230,50,20);
		b3.setBounds(170,230,50,20);
		b4.setBounds(230,230,50,20);
		b5.setBounds(290,230,50,20);
		
		//Add components to the frame
		f.add(l1);
		f.add(l2);
		f.add(l3);
		
		f.add(t1);
		f.add(t2);
		f.add(t3);
		
		f.add(b1);
		f.add(b2);
		f.add(b3);
		f.add(b4);
		f.add(b5);
		
        //Action Buttons
		b1.addActionListener(this);
		b2.addActionListener(this);
		b3.addActionListener(this);
		b4.addActionListener(this);
		b5.addActionListener(this);
		
		f.setLayout(null);
		f.setVisible(true);
		f.setSize(400,350);
	}
	
	public void actionPerformed(ActionEvent e)
	{
		int n1=Integer.parseInt(t1.getText());
		int n2=Integer.parseInt(t2.getText());
		
		//Buttons Operations
		if(e.getSource() == b1)
		{
		  t3.setText(String.valueOf(n1+n2));
		}
			
		if(e.getSource() == b2)
		{
		  t3.setText(String.valueOf(n1-n2));
		}
		
		if(e.getSource() == b3)
		{
		  t3.setText(String.valueOf(n1*n2));
		}
		
		if(e.getSource() == b4)
		{
		  t3.setText(String.valueOf(n1/n2));
		}
		
		if(e.getSource() == b5)
		{
		  System.exit(0);
		}
	}
	
	public static void main(String args[])
	{
            new Calculator();
	}
}

Output: Save the file with .java extension and open the command prompt on that directory and run the following code.

C:\java>javac Calculator.java
C:\java>java Calculator

You will see the following result:

This is the end of the article Simple calculator program in java using AWT with output.
Learn more about Java Programs.

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This article is based on the Java Program to create Login Window using AWT Controls. Here we will use the AWT components Label, Button and Textfield. We will see the code to create a user_name and password text field with login and signup buttons.

AWT program in Java with output:

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Awt Program in java with Output to Create Login Window

import java.awt.*;
import java.awt.event.*;

class LoginWindowAWT extends Frame
{
    //Declaring text fields and Buttons
    TextField userName, password;
    Button btn1, btn2;
    
    LoginWindowAWT()
    {
        setLayout(new FlowLayout());
        this.setLayout(null);
        
        //Setting the name and password that will be displayed
        Label u_name = new Label("User Name:",Label.CENTER);
        Label pass = new Label("Password:",Label.CENTER);
        
        //username declaration
        userName = new TextField(20);
        this.add(u_name);
        this.add(userName);

        //Password declaration
        password = new TextField(20);
        this.add(pass);
        this.add(password);
        
        password.setEchoChar('#');
        
        //Button Declaration
        btn1 =new Button("LogIn");
        btn2 =new Button("SignUp");
        this.add(btn1);
        this.add(btn2);
        
        //Setting the display Bounds
        userName.setBounds(200,100,90,20);
        u_name.setBounds(70,90,90,40);
        

        password.setBounds(200,140,90,20);
        pass.setBounds(70,130,90,40);

        btn1.setBounds(100,260,70,40);
        btn2.setBounds(180,260,70,40);
 
    }
    public static void main(String args[])
    {
        //creating an object
        LoginWindowAWT ml=new LoginWindowAWT();
        
        //background Color
        ml.setBackground(Color.RED) ;

        ml.setTitle("Login Window AWT");
        ml.setVisible(true);
        ml.setSize(400,400);
        
    }
}

Output: Save the file with .java extension and open the command prompt on that directory and run the following code.

C:\java>javac LoginWindowAWT.java
C:\java>java LoginWindowAWT

You will see the following result:

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This is the end of the article to create a Login Window with an AWT program in Java with output.
Learn more about Java Programs.

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