This is the 23rd day of my participation in the First Challenge 2022
Java Programming graphical User Interface
The container
In addition to the JFrame representation, there are several other common forms: JPanel, JSplitPane, JTabbedPane, JScrollPane, JDesktopPane, JInternalFrame, and so on
JPanel
JPanel is also one of the most commonly used containers, which can be used to complete a variety of complex interface display. You can add any component to a JPanel, and then add the JPanel container directly to the JFrame container to display
| methods | role |
|---|---|
| public JPanel() | Create a default JPanel object, using flow layout management |
| public JPanel(LayoutManager layout) | Creates a JPanel object specifying the layout manager |
import javax.swing.*;
public class Hello {
public static void main(String[] args) {
JFrame frame = new JFrame("一");
JPanel pan = new JPanel();
pan.add(new JLabel("A"));
pan.add(new JButton("A"));
pan.add(new JLabel("B"));
pan.add(new JButton("B"));
frame.add(pan);
frame.pack();
frame.setLocation(300.200);
frame.setVisible(true); }}Copy the code
All components are added sequentially to the JPanel
JSplitPane
The main function of JSplitPane is to split the panel, which can divide a form into two sub-forms, either horizontally or vertically
constant
| constant | role |
|---|---|
| public static final int HORIZONTAL_SPLIT | Represents horizontal segmentation |
| public static final int VERTICAL_SPLIT | Represents vertical segmentation |
methods
| methods | role |
|---|---|
| public JSplitPane(int newOrientation) | Create an object and specify how to split it |
| public JSplitPane(int newOrientation,boolean new ContinuousLayout,Component newLeftComponent,Component newRightlLocation) | Creates objects that specify how to split, whether the splitter bar changes to redraw the image, and display components at both ends |
| public void setDividerLocation(double proportionalLocation) | Sets the position of the splitter bar, by percentage |
| public void setOneTouchExpandable(boolean newValue) | Set whether to provide quick expansion and collapse functions |
| public void setDividerSize(int newSize) | Set the splitter bar size |
import javax.swing.*;
import java.awt.*;
public class Hello {
public static void main(String[] args) {
JFrame frame = new JFrame("一");
Container cont = frame.getContentPane();
// Get the form container
JSplitPane lf = null;
JSplitPane tb = null;
lf=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,new JLabel("Left"),new JLabel("Right"));
tb=new JSplitPane(JSplitPane.VERTICAL_SPLIT,lf,new JLabel("Under"));
tb.setDividerSize(10);
tb.setOneTouchExpandable(true);
cont.add(tb);
frame.setSize(300.200);
frame.setLocation(300.200);
frame.setVisible(true); }}Copy the code
The length of the partition line on the left and right panels is relatively small
The length of the dividing line of the upper and lower panel is larger
Has quick expansion/collapse function
JTabbedPane
JTabbedPane is a panel with multiple tabs
constant
| constant | role |
|---|---|
| static final int TOP | Indicates the position pointing to the top of the box |
| static final int BOTTOM | Indicates the position at the bottom of the box |
| static final int LEFT | It points to the left of the box |
| static final int RIGHT | Indicates the position to the right of the frame |
methods
| methods | role |
|---|---|
| public JTabbedPane(int tabPlancement) | Creates the object and specifies the TAB layout |
| public void addTab(String title,Component compioent) | Add a component with a title and no icon |
| public void addTab(String title,Icon icon,Component component) | Add a component with a title and an icon |
| public void addTab(String title,Icon icon,Component component,String tip) | Add a component with a title, icon, and prompt |
import javax.swing.*;
import java.awt.*;
public class Hello {
public static void main(String[] args) {
JFrame frame = new JFrame("一");
Container cont = frame.getContentPane();
JTabbedPane tab = null;
tab = new JTabbedPane(JTabbedPane.TOP);
JPanel p1= new JPanel();
JButton b1 = new JButton("1");
p1.add(b1);
JPanel p2= new JPanel();
JButton b2 = new JButton("2");
p2.add(b2);
tab.addTab("一",p1);
tab.addTab("二",p2);
cont.add(tab);
frame.setSize(300.200);
frame.setLocation(300.200);
frame.setVisible(true); }}Copy the code
Two tabs are created and placed at the top of the form
Each TAB adds a JPanel panel
JScrollPane
The main function is to add horizontal scroll bars to display content
| constant | role |
|---|---|
| static final int HORIZONTAL_SCROLLBAR_ALWAYS | Always display a horizontal scroll bar |
| static final int HORIZONTAL_SCROLLBAR_NEVER | Horizontal scrollbars are not displayed under any circumstances |
| static final int HORIZONTAL_SCROLLBAR_AS_NEEDED | Display horizontal scroll bars according to your needs |
| static final int VERTICAL_SCROLLBAR_ALWAYS | Always display a vertical scroll bar |
| static final int VERTICAL_SCROLLBAR_NEVER | Do not display a vertical scroll bar under any circumstances |
| static final int VERTICAL_SCROLLBAR_AS_NEEDED | Displays a vertical scroll bar based on your needs |
| methods | role |
|---|---|
| public JScrollPane(Component view) | Adds the specified component to the scrollbar to display the scrollbar by size |
| public JScrollPane(Component view,int vsbPolicy,int hsbPolicy) | Adds the specified component to the scrollbar, setting whether to display the scrollbar as required |
| public void setHorIzontalScrollBarPolicy(int policy) | Sets the display policy for the horizontal scroll bar |
| public void setVerticalScrollBarPolicy(int policy) | Sets the display policy for the vertical scroll bar |
import javax.swing.*;
import java.awt.*;
public class Hello {
public static void main(String[] args) {
JFrame frame = new JFrame("一");
Container cont = frame.getContentPane();
String Path="C:\\Users\\30452\\Desktop\\123.jpg";
Icon icon = new ImageIcon(Path);
JPanel pan = new JPanel();
JLabel lab = new JLabel(icon);
pan.add(lab);
JScrollPane s = null;
s = new JScrollPane(pan,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
cont.add(s);
frame.setSize(200.500);
frame.setLocation(300.200);
frame.setVisible(true); }}Copy the code
JDesktopPane and JInternalFrame
JDesktopPane specifies the basic form of a parent form, and JInternalFrame specifies the child forms to which jInternalFrames need to be added
Common methods of the JDesktopPane class
| methods | role |
|---|---|
| public JDesktopPane() | Create a JDesktopPane() object |
| public void setSelectedFrame(JInternalFrame f) | Sets the JInternalFrame currently active in this JDesktopPane |
Common methods of the JInternalFrame class
| methods | role |
|---|---|
| public JInternalFrame(String title) | Creates a non-resizable, non-closed, non-maximized, non-iconified JInternalFrame with the specified title |
| public JInternalFrame(String title,boolean resizable) | Creates a non-closable, non-maximized, non-iconicized, resized, and captioned JInternalFrame |
| public JInternalFrame(String title,boolean resizable,boolean closable,boolean maximizable,boolean iconifiable) | Creates a resizable, closeable, maximizable, non-iconizable, JInternalFrame with the specified title |
import javax.swing.*;
import java.awt.*;
public class Hello {
public static void main(String[] args) {
JFrame frame = new JFrame("一");
frame.setLayout(new BorderLayout());
Container cont = frame.getContentPane();
JDesktopPane desk = new JDesktopPane();
cont.add(desk,BorderLayout.CENTER);
JInternalFrame jif = null;
String Path = "C:\\Users\\30452\\Desktop\\123.jpg";
Icon icon = new ImageIcon(Path);
JPanel pan = null;
for(int i=0; i<2; i++){ jif =new JInternalFrame("test".true.true.true.true);
pan = new JPanel();
pan.add(new JLabel(icon));
jif.setLocation(35-i*20.35-i*20);
jif.add(pan);
jif.pack();
jif.setVisible(true);
desk.add(jif);
}
frame.setSize(600.800);
frame.setLocation(300.200);
frame.setVisible(true); }}Copy the code