Java GUI (graphical user interface) exercises

6.1.3 A simple GUI program

Package six; Import javax.swing.*; Import java.awt.*; Import java.awt.event.*; public class Main {private static int numclicks = 0;  Number of records private static JFrame frame = new JFrame ("Simple GUI");p rivate static JLabel label = new JLabel ("button click:" + "0    ");p Riva Te static JButton button = new JButton ("Click me! ~ ~ ~ ");p rivate static JPanel pane = new JPanel ();  Container public static void main (string[] args) {Pane.setborder (Borderfactory.createemptyborder (60,60,20,60)); Pane.setlayout (new GridLayout (0,1));  Set the layout pane.add (button);p ane.add (label), Frame.getcontentpane (). Add (pane,borderlayout.center); button.setmnemonic (keyevent.vk_i); Button.addactionlistener (new ActionListener () {  //mouse click event public void actionperformed ( ActionEvent e) {numclicks++;label.settext ("button clicks:" +numclicks);}); Frame.setdefaultcloseoperation (Jframe.exit_on_close); Frame.pack (); frame.setvisible (True);}}        

6.4.2 using the FlowLayout layout manager

FlowLayout can automatically adjust the layout according to the size of the window

Package six; Import javax.swing.*; Import java.awt.*; Import java.awt.event.*; public class Main {JButton b1,b2,b3,b4,b5; JFrame frame;  Form public void display () {frame = new JFrame ("Test book layout manager"); Frame.setdefaultcloseoperation (jframe.exit_on_close);//b1 = new JButton ("button 1"), b2 = new JButton ("button 2"), B3 = new JButton ("button 3"), B4 = new JButton ("button 4"), B5 = new JButton ("button 5"); FlowLayout FlowLayout = new FlowLayout (); Sequential layout manager Container ContentPane = Frame.getcontentpane ();  Container contentpane.setlayout (FlowLayout); Contentpane.add (B1); Contentpane.add (B2); Contentpane.add (b3); Contentpane.add (B4); Contentpane.add (B5); Contentpane.setsize (200,100); Frame.pack (); frame.setvisible (true);} public static void Main (String[]args) {new Main (). display ();//Silly B}}        

6.4.3 using the Zone layout manager borderlayout

BorderLayout Sub-east, how to scale, its north and south always maintain the best height.

Package six; Import javax.swing.*; Import java.awt.*; Import java.awt.event.*; public class Main {JButton b1,b2,b3,b4,b5; JFrame frame;  Form public void display () {frame = new JFrame ("Test book layout manager"); Frame.setdefaultcloseoperation (jframe.exit_on_close);//b1 = new JButton ("button 1"), b2 = new JButton ("button 2"), B3 = new JButton ("button 3"), B4 = new JButton ("button 4"), B5 = new JButton ("button 5"); BorderLayout borderlayout = new BorderLayout (); Container ContentPane = Frame.getcontentpane ();  Container contentpane.setlayout (borderlayout); Contentpane.add (b1,borderlayout.east); Contentpane.add (B2, Borderlayout.west); Contentpane.add (B3,borderlayout.south); Contentpane.add (B4,borderlayout.north); Contentpane.add (B5,borderlayout.center); contentpane.setsize (200,100); Frame.pack (); frame.setvisible (true);} public static void Main (String[]args) {new Main (). display ();//Silly B}}        

6.4.5 Card Layout Manager cardlayout

The card layout manager takes a container as a card, with only one card visible at a time.

Package six; Import javax.swing.*; Import java.awt.*; Import java.awt.event.ActionEvent;  Import Java.awt.event.ActionListener; public class Main extends jframe{//class main inherits from Jframeprivate JPanel pane = null;private JPanel p = null;private cardlayout C ard = null;private JButton button_1 = null;private JButton button_2 = null;private JButton B1 = null,b2 = Null,b3 = Null;p Rivate JPanel p1 = null,p2 = Null,p3 = Null;public Main ()//{super ("Card layout manager test"); Try{uimanager.setlookandfeel (" Com.sun.java.swing.plaf.windows.WindowsLookAndFeel ");} catch (Exception ex) {ex.printstacktrace ();}  Create a new card layout card = new CardLayout (5,5);p ane = new JPanel (card);p = new JPanel (); button_1 = new JButton ("< previous step"); button_2 = New JButton ("Next >"), B1 = new JButton ("1"), b2 = new JButton ("2"), B3 = new JButton ("3"); B1.setmargin (New Insets (2,2,2, 2); B2.setmargin (new Insets (2,2,2,2)); B3.setmargin (new Insets (2,2,2,2));p. Add (button_1);p. Add (B1);p. Add (B2); P.add (B3);p. Add (button_2);p 1 = new JPanel ();p 2 = new JPanel ();p 3 = new JPanel ();p 1.setBackground (color.red);p 2.setBackground (color.blue);p 3.setBackground (color.green);p 1.add (new JLabel ("Jpanel_1"));p 2.add (New JLabel ("Jpanel_2"));p 3.add (New JLabel ("Jpanel_3"));p Ane.add (P1, "P1");p Ane.add (P2, "P2");p Ane.add (P3, "P3");//Flip Card Layout action Button_1.addactionlistener (new ActionListener () {public void actionperformed ( ActionEvent e) {card.previous (pane);}); Button_2.addactionlistener (new ActionListener () {public void actionperformed (ActionEvent e) {card.next (pane);}}); B1.addactionlistener (new ActionListener () {public void actionperformed (ActionEvent e) {card.show (pane, "P1");}); B2.addactionlistener (new ActionListener () {public void actionperformed (ActionEvent e) {card.show (pane, "P2");}); B3.addactionlistener (new ActionListener () {public void actionperformed (ActionEvent e) {card.show (pane, "P3");}); This.getcontentpane (). Add (Pane), This.getcontentpane (). Add (P,borderlayout.south); This.setdefaultcloseoperation ( Jframe.exit_on_close); This.setsize (+); this.setvisible (true);} Public STAtic void Main (String[]args) {new Main ();//Silly B}}         

Java GUI (graphical user interface) exercises