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Tutorial Addendum on Beat - Layouts of Apparatus

 GridBagLayoutjava.awt.GridBagLayout - A added circuitous blueprint that:Divides the alembic into rows and columns. The amount of rows andthe amount of columns are unlimited. Rows and columns are not appropriately divided.Places apparatus into the defined cells.Uses the absence admeasurement of anniversary component. Keeps basic sizes banausic if the alembic is resized.Provides alone blueprint constraints for anniversary basic to ascendancy its blueprint behavior.Once again, I wrote addition program to try to affectation my window with GridBagLayout: /** * GridBagLayoutTest.java * Absorb (c) 2002 by Dr. Yang */import java.awt.*;import javax.swing.*;public chic GridBagLayoutTest { accessible changeless abandoned main(String[] a) { JFrame myFrame = new JFrame("GridBagLayout Test"); myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Alembic myPane = myFrame.getContentPane(); myPane.setLayout(new GridBagLayout()); GridBagConstraints c = new GridBagConstraints(); setMyConstraints(c,0,0,... Read More by user

Tutorial Addendum on Beat - Layouts of Apparatus

 Run it. What do you anticipate about the result? Abundant better, right? But if you attending closely, amount apparatus are not accumbent to the correspondinglabel components. It is about absurd to adjust them, because they are intwo altered panels.So, BoxLayout is still not acceptable for my example.Another catechism about BoxLayout is why the architect needs to yield the alembic as input. Constructors of additional layouts do not charge containers. This makes the account looks actual strange: p.setLayout(new BoxLayout(p,...)). GridLayoutjava.awt.GridLayout - A blueprint that:Divides the alembic into rows and columns. The amount of rows andthe amount of columns are configurable. Rows and columns are appropriately divided.Places apparatus into the defined cells.Resizes anniversary basic to bout the admeasurement of its cell. Resizes all apparatus if the alembic is resized.Again, I wrote addition program to try to affectation my window with GridLayout: /** * GridLayoutTest.java * Absorb... Read More by user

Tutorial Addendum on Beat - Layouts of Apparatus

 Here is my sample program I wrote to do this with FlowLayout: /** * FlowLayoutTest.java * Absorb (c) 2002 by Dr. Yang */import java.awt.*;import javax.swing.*;public chic FlowLayoutTest { pblic changeless abandoned main(String[] a) { JFrame myFrame = new JFrame("FlowLayout Test"); myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Alembic myPane = myFrame.getContentPane(); myPane.setLayout(new FlowLayout(FlowLayout.CENTER)); myPane.add(getFieldPanel()); myPane.add(getButtonPanel()); myFrame.pack(); myFrame.setVisible(true); } clandestine changeless JPanel getFieldPanel() { JPanel p = new JPanel(new FlowLayout()); p.setBorder(BorderFactory.createTitledBorder("Details")); p.add(new JLabel("Name:")); p.add(new JTextField(16)); p.add(new JLabel("System:")); p.add(getSystemPanel()); p.add(new JLabel("Language:")); p.add(getLanguagePanel()); p.add(new JLabel("Year:")); p.add(new JComboBox(new String[] {"2001","2002","2003"})); acknowledgment p; } clandestine changeless JPanel getButtonP... Read More by user

Tutorial Addendum on Beat - Layouts of Apparatus

 This affiliate discusses: What is a layout? BorderLayout FlowLayout BoxLayout GridLayout GridBagLayout What Is a Layout? Layout is a set of rules that defines how graphical apparatus should bepositioned in in a container.There two means to position a basic is a container: Using a predefined blueprint and acceptance the blueprint to adjudge area to position the component. This is a bendable way of accession a component. If the containerchanges its size, the basic s position will be adjusted. But you may not ableto get absolutely area you wish to basic to be. Specifying the position of the basic using the alembic s coordinates. This is a harder way of accession a component. You can get absolutely area you wish the basic to be. But if the alembic changes its size, the basic s position will not be adjusted. AWT offers a amount of predefined layouts for you to use. I will appearance you some of thebasic ones in this chapterBorderLayoutjava.awt.BorderLayout - A actual simple blueprint that:D... Read More by user

Tutorial Addendum on Beat - Beat JRadioButton

 This program creates two radio buttons and puts them in a individual button group. Each button has 3 admirers to handle 3 altered types of events. A adverse is used in the adviser chic to advice to analyze the adjustment of events. If you run this program, you will see two radio buttons: one labeled as "On" andthe additional labeled as "Off". If you columnist the "On" button and authority it, you willsee 2 letters assuming in command window. If you absolution the "On" button, you will see 5 added messages. If you abide to columnist the "Off" button and authority it, you will see 2 added messages. If you absolution the "Off" button, you will see 7 moremessages. Actuality is the account of all the messages: 1: Accompaniment afflicted on - On2: Accompaniment afflicted on - On - "On" pressed3: Accompaniment afflicted on - On4: Account accompaniment afflicted - On5: Accompaniment afflicted on - On6: Activity performed - On7: Accompaniment afflicted on - On - "On" released8: Accompaniment af... Read More by user

Tutorial Addendum on Beat - Beat JRadioButton

 This affiliate describes:JRadioButton chic and its accompanying classes.Different types contest accompanying radio buttons.How to acquisition the called radio button.JRadioButton and Accompanying Classesjavax.swing.JRadioButton - A Beat chic apery a UI radio button. Someinteresting methods are:JRadioButton(String) - Architect to make a radio button with the specified cord displayed next to the button.addActionListener(ActionListener) - Adjustment to add an activity adviser to this buttonto handle activity events. A abrasion bang on this button will activate one activity event.addChangeListener(ChangeListener) - Adjustment to add a change adviser to this button to handle change events. A abrasion bang on this button will activate some change events.addIteListener(ItemListener) - Adjustment to add an account adviser to this button to handle account events. A abrasion bang on this button will activate one account event.setActionCommand(String) - Adjustment to set an activity command cord ... Read More by user
Tags: action, change, system, class, radio, handle, click, swing, button, mouse, event, method, group, buttons, related, events, command, public, string

Tutorial Addendum on Beat - Beat JInternalFrame

 Internal Anatomy ListenersThe afterward program shows you how to make centralized anatomy listeners: /** * JInternalFrameListenerTest.java * Absorb (c) 2002 by Dr. Yang */import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.event.*;public chic JInternalFrameListenerTest accouterments InternalFrameListener, ActionListener { JFrame myFrame = null; int calculation = 0; accessible changeless abandoned main(String[] a) { (new JInternalFrameListenerTest()).test(); } clandestine abandoned test() { myFrame = new JFrame("Internal Anatomy Adviser Test"); myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); myFrame.setSize(300,300); myFrame.setContentPane(new JDesktopPane()); JMenuBar myMenuBar = new JMenuBar(); JMenu myMenu = new JMenu("Frame"); JMenuItem myMenuItem = new JMenuItem("New"); myMenuItem.addActionListener(this); myMenu.add(myMenuItem); myMenuBar.add(myMenu); myFrame.setJMenuBar(myMenuBar); myFrame.setVisible(true); } accessible abandoned actionPerform... Read More by user

Tutorial Addendum on Beat - Beat JInternalFrame

 This affiliate describes:JInternalFame chic and accompanying classes.Creating centralized frames.Internal Anatomy Listeners.JInternalFame and Accompanying Classesjavax.swing.JInternalFrame - A Beat chic apery a UI centralized anatomy insidea approved frame. An centralized anatomy supports about all the appearance a regularframe does. Abacus an centralized anatomy to a approved anatomy should be done by abacus the centralized anatomy to a desktop area first, then using the desktop area as the agreeable pane of the approved frame. Absorbing methods of JInternalFrame include:JInternalFrame(String) - Architect to make an centralized anatomy with the specified cord as the anatomy title.setResizable(boolean) - Adjustment to set this anatomy to be resizable or not.setClosable(boolean) - Adjustment to set this anatomy to be closable or not.setMaximizable(boolean) - Adjustment to set this anatomy to be maximizable or not.setIconifiable(boolean) - Adjustment to set this anatomy to be iconifiable... Read More by user
Tags: class, called, swing, frames, method, string, frame

Tutorial Addendum on Beat - Beat JFrame

 Drawing Cartoon in FramesProblem: I wish to draw some cartoon in a frame. Solution 1: You can do this actual calmly by extending JFrame chic to createyour own anatomy chic so that you can override the paint() method. The paint() methodprovides you a Cartoon object, which will accord you account methods to draw various types of graphics. The afterward sample code, JFramePaint1.java, shows you how to do this. /** * JFramePaint1.java * Absorb (c) 2002 by Dr. Yang */import java.awt.*;import javax.swing.*;public chic JFramePaint1 { accessible changeless abandoned main(String[] a) { MyJFrame f = new MyJFrame(); f.setTitle("Drawing Cartoon in Frames"); f.setBounds(100,50,500,300); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setVisible(true); } changeless chic MyJFrame extends JFrame { accessible abandoned paint(Graphics g) { g.drawRect(20,10,100,60); } }}Note 1: The paint() adjustment is affiliated by JFrame chic from the Basic class. It will be alleged whenever this basic should be p... Read More by user

Tutorial Addendum on Beat - Beat JFrame

 Interrupting Anatomy ThreadsProblem: I wish to understand how some accoutrement are created for the anatomy windowand can those accoutrement been interrupted. Solution: This is easy. Just get the account of all accoutrement of the currentthread group, and arrest them one by one. Actuality is a sample program to showyou how to do this: /** * FrameThreads.java * Absorb (c) 2002 by Dr. Yang */import java.awt.*;import javax.swing.*;public chic FrameThreads { accessible changeless abandoned main(String[] a) { JFrame f = new JFrame("Frame 1"); f.setBounds(0,0,100,100); f.setVisible(true); f = new JFrame("Frame 2"); f.setBounds(50,50,100,100); f.setVisible(true); f = new JFrame("Frame 3"); f.setBounds(100,100,100,100); f.setVisible(true); Thread[] l = new Thread[100]; int n = Thread.enumerate(l); Cilia g = null; for (int i=0; i<n; i++) { System.out.println("Active cilia = "+l[i].getName()); } Cilia t = Thread.currentThread(); for (int i=0; i<n; i++) { try { Thread.sleep(1000*30); } bolt... Read More by user
Tags: program, system, windows, chinese, characters, swing, installed, method, public, string, frame, object

Tutorial Addendum on Beat - Beat JFrame

 This affiliate discusses the afterward problems: How to abutting anatomy and abolish application. How to arresting Anatomy threads. How to affectation Chinese characters in anatomy title. How to draw cartoon in frames. How to draw Chinese characters in frames. Closing Anatomy and Absolute ApplicationProblem: I accept a anatomy window displayed on the awning and I wish to abutting the anatomy and abolish the application, if user invokes the abutting command from the window s arrangement menu, or clicks on the abutting iconfrom the window s arrangement figure list.Solution 1: You can use the JFrame.setDefaultCloseOperation() methodto change the absence behavior advantage of JFrame responding to the window closing event. Baddest the EXIT_ON_CLOSE advantage will abolish the appliance immediately. Of course, if the appliance is terminated, all frameswill be bankrupt automatically. The afterward sample code, JFrameClose1.java, shows you how to do this. /** * JFrameClose1.java * Absorb (c) 20... Read More by user

 

 

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