Swing examples from class.

README.md

Swing examples from class.

Form.java

import java.awt.Dimension;
import java.awt.GridLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Form {

    public static void main(String[] args) {

	JFrame frame = new JFrame("Form!");
	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	frame.setPreferredSize(new Dimension(640, 480));

	Form myForm = new Form();
	FormPanel panel = myForm.getPanel();

	// set layout manager
	panel.setLayout(new GridLayout(3,2));
	
	frame.add(panel);

	frame.pack();
	frame.setVisible(true);

    } // main

    private FormPanel getPanel() {
	return new FormPanel();
    } // getPanel

    private class FormPanel extends JPanel {

	public FormPanel() {	    

	    // name label
	    JLabel nameLabel = new JLabel("Name:");
	    add(nameLabel);

	    // name text field
	    JTextField nameField = new JTextField(10);
	    add(nameField);

	} // FormPanel

    } // FormPanel

} // Form

PushCounter.java

import javax.swing.JFrame;

public class PushCounter {

    public static void main(String[] args) {

	JFrame frame = new JFrame("Push Counter");
	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	PushCounterPanel panel = new PushCounterPanel();
	frame.add(panel);

	frame.pack();
	frame.setVisible(true);

    } // main

} // PushCounter

PushCounterPanel.java

import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class PushCounterPanel extends JPanel {

    private int count;
    private JButton push;
    private JLabel label;

    public PushCounterPanel() {

	this.count = 0;

	this.push = new JButton("Push Me!");

	this.push.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent e) {
		count++;
		label.setText("Pushes: " + count);
	    } // actionPerformed
	});

	this.label = new JLabel("Pushes: " + this.count);

	this.add(this.push);
	this.add(this.label);

	this.setBackground (Color.red);
	this.setPreferredSize (new Dimension(300, 40));

    } // PushCounterPanel

} // PushCounterPanel