Swing UI container (I)

Catalog

A container is an object that holds and manages a set of interface elements . Basic components must be arranged in a container , Otherwise, you can't use .

1. Top containers

 JFrame： Top containers

2. Intermediate vessel

JPanel： Middle panel

JScrollPane： Provide a pane with scroll bars

JSplitPane： Provide a pane with split function

JTabbedPane： Provides a category pane with several tabs （ tab ）

JInternalFrame： Create embedded in JFrame The internal framework of

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A container is an object that holds and manages a set of interface elements . Basic components must be arranged in a container , Otherwise, you can't use .

1. Top containers

Create the initial interface , Provide a container for other components , To build an operation interface that meets the needs of users

 JFrame： Top containers

Construction method	describe
JFrame  f = new JFrame();	Constructor without parameters
JFrame  f = new JFrame(String str);	str Is the window title
Common methods	function
setTitle(String title)	Set up JFrame Title Text
get/ setSize()	obtain / Set up JFrame Size
add(Object a)	Add components to JFrame in
dispose( )	close JFrame And recycle any resources used to create the window
setVisible(boolean b)	Set up JFrame The visibility of
setLocation(x,y)	Set up JFrame In the position of the screen
setBounds（x,y,w,h）	Set up JFrame The location and size of
setExtendedState(int);	Set the extended status , Value ：  NORMAL ICONIFIED MAXIMIZED_HORIZ MAXIMIZED_VERT MAXIMIZED_BOTH
setDefaultCloseOperation(int));	Set the default closing action , Value ：    DO_NOTHING_ON_CLOSE    HIDE_ON_CLOSE    DISPOSE_ON_CLOSE    EXIT_ON_CLOSE /
setResizable（）	Set whether the form can be resized

import javax.swing.*;

public class JFrame_MainClass  {
    public static void main(String[] args) {
        new MyJFrame();
    }
}
class MyJFrame extends JFrame{
    public MyJFrame(){
        super(" A top-level container without anything ");     //  Set the title of the top-level form 
        this.setSize(400,360);                 //  Set the window size 
        this.setLocation(300,200);             //  Set window position 
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //  Set the default closing mode of the form 
        this.setVisible(true);                               //  Set whether the form is visible 
    }
}

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2. Intermediate vessel

These containers provide the ability to group related components together in a certain layout , Then put the function of intermediate container or top container

 Container： Content panel

• A complete form is composed of an external frame and a content panel ;
• The outer frame is a hollow frame composed of a title block and four sides , It is mainly used to control the size and appearance of forms ;
• What we actually operate is the content panel , Such as setting the background color of the form , Set the layout of the form , Add other components to the form, and so on ;
• Use getContentPane Method to get the content panel of the current form , The return value of this method is Container（ Containers ） Class object , Such as ：
• Container contentPane = getContentPane();
• Container Class is usually used to operate JFrame Content panel for , The common methods are ：

Fang Law primary type	say     bright
void setBackground(Color bg)	Set container background color , By the parameter bg Assign colors
void setLayout(LayoutManager mgr)	Set the layout of the container , The parameter is the layout manager
Component add(Component comp)	Add a component to the container
Component add(Component comp, int index)	Add the specified component to the specified location in the container
void remove(Component comp)	Remove the specified component from the container
void removeAll()	Remove all components from container
void repaint()	Redraws the current container

import javax.swing.*;
import java.awt.*;

class ContentPane_MainClass {
    public static void main(String[] args) {
        MyContentPane msp = new MyContentPane();
    }
}

class MyContentPane extends JFrame{
    private JLabel label;
    private JButton button;
    private Container container;
    public MyContentPane() {
        super(" I am a JFrame A content panel of " );
        container = this.getContentPane();            //  obtain JFrame Content panel for 
        container.setLayout(new BorderLayout());      //  Set the layout of the content panel 
        label = new JLabel(" A small tab on the content panel ");
        button = new JButton(" A small button on the content panel ");
        container.add(label,BorderLayout.NORTH);      //  Add components to the content panel 
        container.add(button,BorderLayout.SOUTH);
     //   this.add(container);                        //  There is no need to add the content panel to the top-level form 
        this.setSize(400, 360);
        this.setLocation(300, 200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

 

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JPanel： Middle panel

Construction method	describe
JPanel p = new JPanel();	Default FlowLayout Layout panel
JPanel p = new JPanel(LayoutManager layout);	Specify the panel of the layout
Common methods	function
void setBackground(Color bg)	Sets the background color of the panel , By the parameter bg Assign colors
void setLayout(LayoutManager mgr)	Set the layout of the panel , The parameter is the layout manager
Component add(Component comp)	Add a component to the panel
Component add(Component comp, int index)	Add the specified component to the specified position in the panel
void remove(Component comp)	Remove the specified component from the panel
void removeAll()	Remove all components from the panel
void repaint()	Redraws the current panel

public class JPanel_MainClass {
    public static void main(String[] args) {
        new MyJPanel();
    }
}
class MyJPanel extends JFrame {
    private JPanel panel;
    public MyJPanel() {
        super(" My middle panel ");
        panel = new JPanel(new BorderLayout()); //  Create the middle panel of the specified layout 
        panel.setBackground(Color.red);         //  Set the background color of the middle panel 
        this.add(panel);                        //  Place the middle panel panel Put in the top panel JFrame
         this.setSize(400,360);                 //  Set the window size 
        this.setLocation(300,200);              //  Set window position 
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //  Set the default closing mode of the form 
        this.setVisible(true);                               //  Set whether the form is visible 
    }
}

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JScrollPane： Provide a pane with scroll bars

Construction method	describe
new JScrollPane()	Nonparametric construction method
new JScrollPane(Component comp)	Specify the construction method of the component
JScrollPane(int vsbPolicy,int hsbPolicy)：	Build a new one JScrollPane object , There is no display component in it , But setting the timing of the roll axis .
Common methods	function
void setHorizontalScrollBarPolicy()	Set the horizontal scroll block ： HORIZONTAL_SCROLLBAR_ALAWAYS： Show horizontal scroll axis HORIZONTAL_SCROLLBAR_AS_NEEDED： The horizontal scroll axis appears when the horizontal area of component content is larger than the display area HORIZONTAL_SCROLLBAR_NEVER： The horizontal scroll axis is not displayed
void setVerticalScrollBarPolicy()	Set the vertical scroll block ： VERTICAL_SCROLLBAR_ALWAYS： Show the vertical scroll axis  VERTICAL_SCROLLBAR_AS_NEEDED： The vertical scroll axis appears when the vertical area of component content is larger than the display area    VERTICAL_SCROLLBAR_NEVER： The vertical scroll axis is not displayed
void setCorner(String, Component)	Sets or gets the specified angle .int Parameter specifies which corner , And must be ScrollPaneConstants One of the following constants defined in ： UPPER_LEFT_CORNER, UPPER_RIGHT_CORNER, LOWER_LEFT_CORNER,LOWER_RIGHT_CORNER,LOWER_LEADING_CORNER,LOWER_TRAILING_CORNER, UPPER_LEADING_PER,NERPER.

import javax.swing.*;

public class JScrollPane_MainClass {
    public static void main(String[] args) {
        MyJScrollPane msp = new MyJScrollPane();
    }
}
class MyJScrollPane extends JFrame{
    private JScrollPane scrollPane;
    private JTextArea textArea;
    public MyJScrollPane() {
        super(" My scroll panel " );
        textArea = new JTextArea(20,20);
        scrollPane = new JScrollPane(textArea);      //  The text field component textArea Put in the scroll panel 
        scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); //  Set the horizontal scroll block 
        scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);     //  Set the vertical scroll block 
        this.add(scrollPane);                        //  Place the scroll panel in the top panel 
        this.setSize(400, 360);
        this.setLocation(300, 200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

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JSplitPane： Provide a pane with split function

Construction method	describe
JSplitPane()	Build a new one JSplitPane, It contains two default buttons , And arranged horizontally , And there's no Continuous Layout function Continuous Layout It means that when you drag the dividing line of the cutting surface , Whether the components in the window will be dynamically resized as the separation line is dragged
JSplitPane(int newOrientation)	Create a specified horizontal or vertical cut JSplitPane, But there is no Continuous Layout function Continuous Layout It means that when you drag the dividing line of the cutting surface , Whether the components in the window will be dynamically resized as the separation line is dragged
JSplitPane(int newOrientation, boolean newContinuousLayout)	Create a horizontal or vertical cut JSplitPane, And specify whether there is Continuous Layout function . 1.Continuous Layout It means that when you drag the dividing line of the cutting surface , Whether the components in the window will be dynamically resized as the separation line is dragged 2.newContinuousLayout It's a boolean value , Set up as true, The component size will change with the drag of the separation line ; Set up as false, Then the component size is determined when the separation line stops changing . You can also use JSplitPane Medium setContinuousLayout() Method to set this item
Common methods	function
setDividerLocation(double proportionalLocation)	Set the position of the separator , Expressed as a percentage
setContinuousLayout(boolean newContinuousLayout)	Set up  continuousLayout  The value of the property , When the user wants to make the sub components continuously redisplay and layout the sub components , This value must be  true
setDividerLocation(int location)	Set the position of the separator
setDividerSize(int size)	Set the size of the separator
getDividerLocation()	Get the position of the separator
getDividerSize()	Get the size of the separator
setOneTouchExpandable(boolean val)	Set up  oneTouchExpandable  The value of the property is  true, be JSplitPane  On the separator bar, a will be displayed for quick expansion / The arrow that folds the divider bar

import javax.swing.*;

public class JSplitPane_MainClass {
    public static void main(String[] args) {
        MyJSplitPane msp = new MyJSplitPane();
    }
}

class MyJSplitPane extends JFrame{
    private JSplitPane jsp;
    private JLabel label;
    private JButton button;
    public MyJSplitPane() {
        super(" One of my panes with split function " );
        jsp = new JSplitPane ();
        label = new JLabel(" I'm a label ");
        button = new JButton(" I'm a button ");
        jsp.setDividerLocation(200);         //  Set the position of the split line 
        jsp.add(label,JSplitPane.LEFT);      //  Add a component and set its position in the split pane 
        jsp.add(button,JSplitPane.RIGHT);
        System.out.println(" The size of the current separator ："+jsp.getDividerSize());
        System.out.println(" The current position of the separator bar ："+jsp.getDividerLocation());
        this.add(jsp);                       //  Place the split pane in the top panel 
        this.setSize(400, 360);
        this.setLocation(300, 200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

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JTabbedPane： Provides a category pane with several tabs （ tab ）

Construction method	describe
JTabbedPane()	Create an empty TabbedPane , The default label location is  JTabbedPane.TOP
JTabbedPane(int tabPlacement)	Create an empty Of TabbedPane And any specified tab layout The tab layout can be ： JTabbedPane.TOP JTabbedPane.BOTTOM JTabbedPane.LEFT JTabbedPane.RIGHT
JTabbedPane(int tabPlacement,int tabLayoutPolicy)	Create an empty TabbedPane With the specified tab layout and tab layout policy The label layout strategy can be ：  JTabbedPane.WRAP_TAB_LAYOUT JTabbedPane.SCROLL_TAB_LAYOUT
Common methods	function
void addChangeListener(ChangeListener event)	Add one ChangeListener event
void removeChangeListener(ChangeListenerevent)	Remove a ChangeListener event
int getTabPlacement()	Returns the location of the tabs in this tab pane
setTabPlacement(int tabPlacement)	Set the label position for this tab pane （ The default value is ——JTabbedPane.TOP ）
int getSelectedIndex()	Returns the currently selected index of this tab pane
void setSelectedIndex(int index)	Set the selected index for this tab pane
Component getSelectedComponent()	Returns to the currently selected component in this tab pane
void setSelectedComponent(Component c)	Set the selected components of this tab pane
void insertTab(String title,Icon icon,Component component, String tip, int index)	Inserts a new tab for a given component on a given index , By the given title / Or icon indicates , Either of them may be null
void addTab(String title, Icon icon, Component component, String tip)	Add the given title 、 Components 、 New tabs like icons , Which can be null
void removeTabAt(int index)	Delete index Label of position
void remove(Component component)	from JTabbedPane Delete specified Component, If component by null, This method does nothing
void removeAll()	Delete all tabs
int getTabCount()	Back here tabbedpane Number of tabs in
int getTabRunCount()	Returns the number of tab runs currently used to display tabs
Color getBackgroundAt(int index)	return index Label background color
Color getForegroundAt(int index)	return index The foreground color of the label is
void setBackgroundAt(int index, Color background)	Set up index Background color background It can be null , In this case, the background color of the tab defaults to the background color tabbedpane . If there are no tabs in the index , Internal exception will be thrown
void setForegroundAt(int index, Color foreground)	take index The foreground color is set to foreground , It can be for null
void setEnabledAt(int index,boolean enabled)	Set whether to enable index The tab of
void setComponentAt(int index, Component component)	stay index Tab to place this component
void setMnemonicAt(int tabIndex, int mnemonic)	Set shortcut key
setFont(font)	Set the font of the tab name

import javax.swing.*;

class MyJTabbedPane_MainClass {
    public static void main(String[] args) {
        MyJTabbedPane msp = new MyJTabbedPane();
    }
}

class MyJTabbedPane extends JFrame{
    private JLabel label1,label2;
    private JPanel panel1,panel2;
    private JTabbedPane tabbedPane1;
    public MyJTabbedPane() {
        super(" I am a category pane with several labels " );
        label1 = new JLabel(" I am a panel1 Label of the panel ");
        label2 = new JLabel(" I am a panel2 Label of the panel ");
        panel1 = new JPanel();
        panel2 = new JPanel();
        panel1.add(label1);                          //  Add the label to the corresponding panel 
        panel2.add(label2);

        tabbedPane1 = new JTabbedPane();
        tabbedPane1.add(panel1," tab 1");           //  take JPnael Add panel to tab panel 
        tabbedPane1.add(panel2," tab 2");

        this.add(tabbedPane1);                      //  Add a tab panel to the top-level form 
        this.setSize(400, 360);
        this.setLocation(300, 200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

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JInternalFrame： Create embedded in JFrame The internal framework of

Construction method	describe
JInternalFrame()	Create one that cannot be changed in size 、 Don't close it 、 Cannot be maximized or minimized 、 There is no title JInternalFrame
JInternalFrame(String title)	Create one that cannot be changed in size 、 Don't close it 、 Cannot be maximized or minimized 、 But with a title JInternalFrame
JInternalFrame(String title,boolean resizable)	Create a non closeable 、 Cannot be maximized or minimized 、 But it can be resized and has a title JInternalFrame
JInternalFrame(String title,boolean resizable,boolean closable)	Create a closeable 、 You can change the size 、 And has a title , But it can not be maximized or minimized JInternalFrame
JInternalFrame(String title,boolean resizable,boolean closable,boolean maximizable)	Create a closeable 、 You can change the size 、 With title 、 Maximize , But it cannot be minimized JInternalFrame
JInternalFrame(String title,boolean resizable,boolean closable,boolean maximizable,boolean iconifiable)	Create a closeable 、 You can change the size 、 With title 、 Maximizable and minimized JInternalFrame
Common methods	function
setLocation(int x, int y)	Set the built-in form size
setSize(int width, int height)	Set the built-in form position
setVisible(boolean bool)	Set whether the built-in form is visible

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

class JInternalFrame_MainClass {
    public static void main(String[] args) {
        MyJInternalFrame msp = new MyJInternalFrame();
    }
}

class MyJInternalFrame extends JFrame{
    private Container container;
    private JDesktopPane desktopPane;
    private JButton button;

    private JInternalFrame internalFrame;
    private Container icontentPane;
    private JTextArea internalTextArea;
    public MyJInternalFrame() {
        super(" Create embedded in JFrame The internal framework of " );
        container = this.getContentPane();             //  Get a content panel 
        desktopPane = new JDesktopPane();              //  Create a virtual desktop . It can display and manage many JInternalFrame The hierarchical relationship between 
        button = new JButton(" Button that triggers the internal frame ");     //  establish JFrame A button for 
        button.addActionListener(new ActionListener() {//  Add an event to the button 
            public void actionPerformed(ActionEvent e) {
                internalFrame = new JInternalFrame("JFrame The internal framework of ",true,
                        true,true,true);
                icontentPane = internalFrame.getContentPane();
                internalTextArea = new JTextArea();
                icontentPane.add(internalTextArea);
                desktopPane.add(internalFrame);   //  take internalFrame Add to desktopPane in 
                internalFrame.setLocation(20, 20);//  Set the relevant parameters of the built-in framework 
                internalFrame.setSize(200, 200);
                internalFrame.setVisible(true);
            }
        });
        container.add(desktopPane);
        container.add(button,BorderLayout.SOUTH);
        this.setSize(400, 360);
        this.setLocation(300, 200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}