Interfaces, GUIs, and Applets

CS 161 - Java

SimpleGUI.java

Here is an example fo a Java application that creates a simple graphical user interface: one button displayed in a top level window with a title and borders. application

Source: examples/SimpleGUI.java


/** A very simple example of a Java GUI application

 **/

 

// AWT components and Event classes used:

 

import java.awt.Button;

import java.awt.Frame;

 

public class SimpleGUI {

 

  private Frame appFrame = null;

  private Button doSomethingButton = null;

 

  public static void main(String[] args) {

 

    SimpleGUI app = new SimpleGUI();

    app.run();

  }

 

  /** Constructor: make a frame to hold the GUI components and the

   ** GUI components themselves.

   **/

  public SimpleGUI() {

    appFrame = new Frame("Simple Java GUI");

    doSomethingButton = new Button("Do Nothing");

 

    appFrame.add(doSomethingButton);

  }

 

  /** run the application

   **/

  public void run() {

    appFrame.validate();

    appFrame.setVisible(true);

  }

}

Note that, other than displaying the button, this application does nothing.

jwd