mongodb graphical interface

message from the server in the background and store it in the message model array, and then transfer the data to the login interface.One problem with this process is that when a mailbox list is long, the background takes a long time to get the mailing list.Workaround: 1. Only the most recent 30 messages are available.2. If you want to get all, and at the same time the mailing list is longer, we first get the latest 30 messages, the data is passed to the main mailbox

U disk installation DVD version of the CentOS7, no desktop, the browser is also black box version, if you need a desktop, the following three commands, but after installing the desktop, the system will not be pure;1 Installing the GNOME package:" GNOME Desktop " "Graphical administration Tools"　　2 Update the operating level of the chest: set the boot automatically into the graphical interface:sudo ln-sf/lib

java.awt.*;public class BorderLayoutDemo1 extends JFrame {JPanel p=new JPanel ();Public Borderlayoutdemo () {SetLayout (New BorderLayout (5,5));SetFont (New Font ("Helvetica", Font.plain, 14));Getcontentpane (). Add ("North", New JButton ("North"));Getcontentpane (). Add ("South", New JButton ("South"));Getcontentpane (). Add ("East", New JButton ("East"));Getcontentpane (). Add ("West", New JButton ("West"));// Setup Panel is centered on streaming layout, component horizontal, vertical spacing

; 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 ();} Creat

1. Order to enter Xwindow$startx Enter or modify the/etc/inittab file cd/etcVI InittabLooking for: Id:3:initdefault:Instead: Id:5:initdefault:2useradd testuser create user TestUserpasswd TestUser set a password for the created user TestUserDescription: The newly created user will create a user directory under/home TestUserUsermod--help Modify user parameters for this commandUserdel testuser Delete User testuserRM-RF testuser Delete the user testuser in the directory above a few commands only the

Install a full set of Xmanager programs Open the Xshell tool program Click New Enter necessary information such as IP Click the Tunnel, the English version is tunnel Tick the Red option 1 and 2 Fill in some user name and password information (figure is slightly O (∩_∩) o) Typing instruction Gnome-panel OK, you are done.This article originated from: http://jingyan.baidu.com/article/d45ad148967fcd69552b80f6.html Graphical

); Lab1.setbounds, Lab2.setbounds (80,80,40,20); Lab3.setbounds (180,150,200,20); Lab4.setbounds ( 20,180,500,20); Lab5.setbounds (50,200,500,20); Txf1.setbounds (120, 80, 200, 20);// Txf3.setbounds, Txf1.seteditable (false), Cp.add (LAB1); Cp.add (TXF1); Cp.add (LAB2); Cp.add (TXF2); Cp.add (submit); Cp.add (LAB3); Cp.add (LAB4); Cp.add (LAB5); Submit.setbounds (140, Submit.addactionlistener (new ActionListener () {public void actionperformed (ActionEvent ae) {if ("Mother's Day"). Equals (Txf2.

extends JPanel Implements Actionlistener{private boolean isfirst;private int row,col,minenumber;private jbutton[][] mine;private int[ [] Mark; Thread t;public minepanel (int row,int col,int Minenumber,boolean isFirst) {This.isfirst=isfirst;this.row=row;this.col =col;this.minenumber=minenumber;mine=new Jbutton[this.row][this.col];mark=new Int[this.row][this.col]; This.setlayout (New GridLayout (Row,col)); Createmine (); createbuttons (); if (IsFirst) {firstinist ();} Else{init ();//Initialize}}p

AWT: Abstract Window Component ToolkitAbstract Windows Toolkit (AWT) is the most primitive Java GUI toolkit. The main advantage of AWT is that it becomes a standard configuration on every version of Java technology, including Java implementations in earlier Web browsers, and it is also very stable. This means that we do not need to install the toolkit separately, which is something we want to use in any Java runtime environment.The most basic relationship in the AWT package is the relationship b

!");//Create a label and set the initial content the - Conn.add (L1); - -Jf.setbounds (200,200,300,200);//To set the window's Properties window position and window size +Jf.setvisible (true);//The Settings window is visible -Jf.setdefaultcloseoperation (Dispose_on_close);//set shutdown if not set, it appears that the program does not exit after closing the window + } A at Public Static voidMain (string[] args) { - NewJframewindow ("window");//Create Window

The code is as follows:Import Java.awt.*;import javax.swing.*;p ublic class Gridframe extends JFrame {//define string array, assign a value to the display text of the button string str[] = {"MC", "MR", "MS", "m+", "←", "C", "%", "π", "7", "8", "9", "/", "4", "5", "6", "*", "1", "2", "3", "-", "0", ".", "=", "+"};p UBL IC Gridframe () {//define panel and set to Grid layout, 4 rows 4 columns, component horizontal, vertical spacing is 7JPanel pan = new JPanel ();p an.setlayout (New GridLayout (6, 4

"); This.setdefaultcloseoperation (exit_on_close);//dimension Dim=this.gettoolkit (). Getscreensize ();// Get screen resolution//this.setbounds (DIM.WIDTH/4, DIM.HEIGHT/4, DIM.WIDTH/2, DIM.HEIGHT/2); This.setsize (800, 600);// Set window size this.setlocationrelativeto (null);//Set window position centered text = new JTextArea ("Welcome ..."); This.getcontentpane (). Add ( New JScrollPane (text)); JToolBar toolbar=new JToolBar ();//toolbar, default horizontal orientation This.getcontentpane ().

One, the use of Python version of the machine1. This machine uses Python version as 3.6.2,windows system.Second, installation steps1. Start-run-cmd2, python3.x need to enter the Python installation location is the PIP directory, and then execute the PIP commandWhere: a pip folder under Python F:\Users\Administrator\AppData\Local\Programs\Python\Python36-32\Lib\site-packages\Pip Install https://wxpython.org/Phoenix/snapshot-builds/(filename of WHL file)WHL files: (actually do not need to download

1.WindowsinstallationXmanager 5.Direct Download2.LinuxSystem EnvironmentUname-aLinux m012.6.32-696.el6.x86_64 #1 SMP Tue Mar 19:29:05 UTC x86_64 x86_64 x86_64gnu/linux3.Installing the desktop environmentYum Groupinstall "Desktop" –y[Yum groupinstall "X window System"-y4.Installation Support ChineseYum Groupinstall "Chinese support" –yNote: minial CentOS installation, if the default choice is English, you need to modify the/etc/sysconfig/i18n, the Lang modified to lang= "ZH_CN. UTF-8 "Sed-i ' s/l

There is a lack of space to notice when booting up. The next day when the restart will not enter the system.But Ctrl + Alt _F6 can enter the shell.It is estimated that the lack of space causes the system to enter.Finding out where the folder space is unusually large can solve the problem.Du-h--max-depth=1 work/testing Similar to the left way to find the folder.found that the/var/lib/apt/folder is too large.It turned out to be caused by adding too many sources in/etc/apt/source.list.You can delet

: INPUT ACCEPT [0:0]: FORWARD ACCEPT [0:0]: OUTPUT ACCEPT [0:0]-A input-m state–state established,related-j ACCEPT-A input-p icmp-j ACCEPT-A input-i lo-j ACCEPT-A input-m state--state new-m tcp-p TCP--dport 22-j ACCEPT-A input-m state--state new-m tcp-p TCP--dport 80-j ACCEPT-A input-m state--state new-m tcp-p TCP--dport 3306-j ACCEPT-A input-j REJECT--reject-with icmp-host-prohibited-A forward-j REJECT--reject-with icmp-host-prohibitedCOMMIT#####################################/etc/init.d/iptab

Swarm Manager, starting Swarm Agent--Starting controllerwaiting For shipyard in 192.168.1.122:8080shipyard available at Http://192.168.1.122:8080Username:admin Password:shipyard　　Third, testingBrowser input IP address: 8080 visit Web page.Precautions:The default access port for shipyard is 8080, and this port is used by many programs. If it is occupied, the port needs to be modified.　　　　[Email protected]:~# NETSTAT-TLNP | grep 8080tcp6 0 0::: 8080 :::*

Add components to the framework: eg.JFrame frame=new JFrame ("JFrame add");Java.awt.Container Container=frame.getcontentpane ();//You can return to the contents pane of the frame, the Contents pane is Java.awt.Container instanceJButton jbtok=new JButton ("OK");Container.add (Jbtok);//The method adds a component instance to the containerContainer.remove (Jbtok);//Delete InstanceThe component is placed on the frame by the layout Manager of the content pane and its default location is central to th

JFrame in the package javax.swing.*eg.Jframe frame=new Jframe ("title block");Frame.setsize (400,300);//If there is no such sentence, the frame appears in the title barFrame.setvisible (TRUE);//The framework does not display before applying this statementFrame.setdefaultcloseoperation (jframe.exit_on_close);//This sentence informs the end of the program when the framework is closed and, if not applicable, the program does not end after the frame is closedBecause SetSize and setvisible are define

, Tkinter. END) -Count =0 - forStreinchstr2: -Count = Count + 1 inT.insert (Tkinter. END,'Section'+ STR (count) +'Step:'+ Stre +'\ n') -T.insert (1.0,'[Altogether'+ STR (count) +'Step]\n') to T.pack () +Tkinter. Button (Root, text="Determine", command=calc). Pack () -Root.mainloop ()Then after running the results such as the number of layers of input Hanoi is 3, and then click the OK button below will show the detailedSteps.(PS: Write this is to make notes to prevent later forget, problem-s