Programming Tutorials

AWT-based applications with a User Interface Window in Java

By: Kamini in Java Tutorials on 2022-09-15  

It is possible to create stand-alone AWT-based applications with a Window. To do this, simply create an instance of the window or windows you need inside main().

Here is an example program that creates an AWT-based application with a user interface window in Java:

import java.awt.Frame;
import java.awt.Button;
import java.awt.Label;
import java.awt.TextField;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class Bone {
    private Frame mainFrame;
    private Label headerLabel;
    private Label statusLabel;
    private TextField inputField;

    public Bone() {
        prepareGUI();
    }

    private void prepareGUI() {
        mainFrame = new Frame("AWT Application");
        mainFrame.setSize(400, 400);
        mainFrame.setLayout(new BorderLayout());
        mainFrame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent windowEvent) {
                System.exit(0);
            }
        });
        headerLabel = new Label();
        headerLabel.setAlignment(Label.CENTER);
        statusLabel = new Label();
        statusLabel.setAlignment(Label.CENTER);
        statusLabel.setSize(350, 100);
        inputField = new TextField();
        inputField.setBounds(50, 100, 300, 100);
        Button submitButton = new Button("Submit");
        submitButton.setBounds(200, 50, 60, 30);
        submitButton.addActionListener(new ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent e) {
                String data = inputField.getText();
                statusLabel.setText("Input: " + data);
            }
        });
        mainFrame.add(headerLabel, BorderLayout.NORTH);
        mainFrame.add(inputField);
        mainFrame.add(submitButton);
        mainFrame.add(statusLabel, BorderLayout.SOUTH);
        mainFrame.setVisible(true);
    }

    public static void main(String[] args) {
        Bone awtApplication = new Bone();
    }
}

Here is the sample output

This program creates a window with a text input field, a submit button, and a label to display the input. When the user enters some text in the input field and clicks the submit button, the input is displayed in the label. The program uses AWT components such as Frame, Label, TextField, and Button to create the user interface. The main method creates an instance of the AWTApplication class and calls its prepareGUI() method to set up the window. When the user closes the window, the program exits.