import java.awt.*;

import javax.swing.*;

import javax.swing.event.*;

import java.util.Calendar;

import java.util.Date;

public class JavaLesson30 extends JFrame{

JLabel nameLabel, streetLabel, stateLabel, dateLabel,

ageLabel, sexLabel, optionsLabel, aboutLabel;

JTextField nameText, streetText;

JComboBox stateList;

JSpinner dateSpin;

JSlider ageSlider;

JRadioButton maleRadio, femaleRadio;

ButtonGroup sexGroup;

JCheckBox morningCheck, afterNCheck, eveningCheck;

JTextArea aboutYou;

public static void main(String[] args){

new JavaLesson30();

}

public JavaLesson30(){

// Create the frame, position it and handle closing it

this.setLocationRelativeTo(null);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setTitle("Random Layout");

JPanel thePanel = new JPanel();

thePanel.setLayout(new GridBagLayout());

nameLabel = new JLabel(" Name:");

addComp(thePanel, nameLabel, 0, 0, 1, 1, GridBagConstraints.EAST, GridBagConstraints.NONE);

nameText = new JTextField(30);

addComp(thePanel, nameText, 1, 0, 2, 1, GridBagConstraints.WEST, GridBagConstraints.NONE);

streetLabel = new JLabel(" Street:");

addComp(thePanel, streetLabel, 0, 1, 1, 1, GridBagConstraints.EAST, GridBagConstraints.NONE);

streetText = new JTextField(30);

addComp(thePanel, streetText, 1, 1, 2, 1, GridBagConstraints.WEST, GridBagConstraints.NONE);

// Create a set of radio buttons and wrap them in a group

Box sexBox = Box.createVerticalBox();

maleRadio = new JRadioButton("Male");

femaleRadio = new JRadioButton("Female");

ButtonGroup sexGroup = new ButtonGroup();

sexGroup.add(maleRadio);

sexGroup.add(femaleRadio);

sexBox.add(maleRadio);

sexBox.add(femaleRadio);

sexBox.setBorder(BorderFactory.createTitledBorder("Sex"));

addComp(thePanel, sexBox, 3, 0, 2, 1, GridBagConstraints.WEST, GridBagConstraints.NONE);

// Create a flow layout panel and space components 10px apart

JPanel statePanel = new JPanel();

statePanel.setLayout(new FlowLayout(FlowLayout.LEFT, 10, 0));

stateLabel = new JLabel("State");

statePanel.add(stateLabel);

// Create a combo box that will hold the states

String[] states = {"PA", "NY", "OH", "WV", "NJ"};

stateList = new JComboBox(states);

statePanel.add(stateList);

dateLabel = new JLabel("Appointment Date");

statePanel.add(dateLabel);

// Get todays date

Date todaysDate = new Date();

// Create a date spinner & set default to today, no minimum, or max

// Increment the days on button presses

// Can also increment YEAR, MONTH, or DAY_OF_MONTH

dateSpin = new JSpinner(new SpinnerDateModel(todaysDate, null, null,

Calendar.DAY_OF_MONTH));

// DateEditor is an editor that handles displaying & editing the dates

JSpinner.DateEditor dateEditor = new JSpinner.DateEditor(dateSpin, "dd/MM/yy");

dateSpin.setEditor(dateEditor);

statePanel.add(dateSpin);

ageLabel = new JLabel("Age: 50");

statePanel.add(ageLabel);

// Creates a slider with a min value of 1 thru 100

// and an initial value of 1

ageSlider = new JSlider(1, 99, 50);

// Create an instance of ListenForEvents to handle events

ListenForSlider lForSlider = new ListenForSlider();

// Tell Java that you want to be alerted when an event

// occurs on the slider

ageSlider.addChangeListener(lForSlider);

statePanel.add(ageSlider);

addComp(thePanel, statePanel, 1, 2, 5, 1, GridBagConstraints.EAST, GridBagConstraints.NONE);

// Create check boxs and assign them to a group

JCheckBox morningCheck, afterNCheck, eveningCheck;

Box optionBox = Box.createVerticalBox();

morningCheck = new JCheckBox("Morning");

afterNCheck = new JCheckBox("Afternoon");

eveningCheck = new JCheckBox("Evening");

optionBox.add(morningCheck);

optionBox.add(afterNCheck);

optionBox.add(eveningCheck);

optionBox.setBorder(BorderFactory.createTitledBorder("Time of Day"));

addComp(thePanel, optionBox, 1, 3, 2, 1, GridBagConstraints.NORTHWEST, GridBagConstraints.NONE);

// Create a text area that is 6 columns high and 40 long

aboutYou = new JTextArea(6, 40);

// Set the default text for the text area

aboutYou.setText("Tell us something about you");

// If text doesn't fit on a line, jump to the next

aboutYou.setLineWrap(true);

// Makes sure that words stay intact if a line wrap occurs

aboutYou.setWrapStyleWord(true);

// Adds scroll bars to the text area ----------

JScrollPane scrollbar1 = new JScrollPane(aboutYou, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

// Other options: VERTICAL_SCROLLBAR_ALWAYS, VERTICAL_SCROLLBAR_NEVER

addComp(thePanel, scrollbar1, 2, 3, 3, 1, GridBagConstraints.EAST, GridBagConstraints.NONE);

this.add(thePanel);

// Adjusts the size of the frame to best work for the components

this.pack();

this.setVisible(true);

// Define if the user can resize the frame (true by default)

this.setResizable(false);

}

// Sets the rules for a component destined for a GridBagLayout

// and then adds it

private void addComp(JPanel thePanel, JComponent comp, int xPos, int yPos, int compWidth, int compHeight, int place, int stretch){

GridBagConstraints gridConstraints = new GridBagConstraints();

gridConstraints.gridx = xPos;

gridConstraints.gridy = yPos;

gridConstraints.gridwidth = compWidth;

gridConstraints.gridheight = compHeight;

gridConstraints.weightx = 100;

gridConstraints.weighty = 100;

gridConstraints.insets = new Insets(5,5,5,5);

gridConstraints.anchor = place;

gridConstraints.fill = stretch;

thePanel.add(comp, gridConstraints);

}

// Implements ActionListener so it can react to events on components

private class ListenForSlider implements ChangeListener{

// Called when the spinner is changed

public void stateChanged(ChangeEvent e) {

// Check if the source of the event was the button

if(e.getSource() == ageSlider){

// Change the value for the label next to the spinner

ageLabel.setText("Age: " + ageSlider.getValue() );

}

}

}

}