layout-manager

问题 So what I am trying to go for is having a staggered layout but the first item in the list needs to span two columns. The first two rows are also a fixed height. I have everything working except the first item spanning two columns. I am using the RecyclerView.Adapter with the StaggeredGridLayoutManager. Doesn't seem like it is out of the box functionality. I assume I can make a custom layout manager I'm just not sure where to start. I have tried searching but I can't find anything about how to

问题 I just wrote a simple code where I want a textfield and a button to appear on the main frame, but after running all I see is the textfield. If I write the code of the button after the textfield then only the button is displayed. Any idea why? JFrame mainframe=new JFrame(); mainframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); mainframe.setBounds(0,0,200,200); JButton jb=new JButton(); jb.setText("Leech"); mainframe.add(jb); JTextField link=new JTextField(50); mainframe.add(link);

问题 I have a JFrame, in this JFrame I have a JPanel that I draw on, this Panel can be any size and so I placed it into a JScrollpane to let me scroll when the panel is larger than the window screen size. Unfortunately does not work as I expected: Making the JFrame window smaller than the JPanel size does not show scroll bars The JScrollPane size now seems locked to the size of the JPanel I have added to it, where as before it resized to the bounds of it's JFrame window (it still kinda does this

问题 I have been using a null layout and I alot of people will say it shouldn't be done this way. Is there a better way? Some code as example: import javax.swing.*; public class Main{ public static void main(String args[]){ JFrame frame = new JFrame(); JPanel panel = new JPanel(); JButton button = new JButton("Click"); //JFrame, frame frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setResizable(false); frame.setSize(500, 500); frame.setLocationRelativeTo(null); frame.setVisible(true);

问题 I have a JFrame , which have some options. When OK button is pressed i want the same JFrame to clear the contents and add new contents. I have tried it but the problem is new JFrame is popped out. What am I doing wrong? import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.IOException; import java.net.InetAddress; import java.net.UnknownHostException; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.*;

问题 I'm designing a GUI with 20 or so components: 10 labels, 4 text fields, 4 buttons, and 2 text areas. Using GridBagLayout seemed a great idea. But with all the instance variables required to do it by the book for each component (i.e., not reuse), a general method for adding components seemed a must. I really thought this could work: (Note: HORIZ is abbreviation for GridBagConstraints.HORIZONTAL; CENTER is abbreviation for GridBagConstraints.CENTER.) public static void addComponent(Container f,

问题 I'm trying to touch limits of MVC architecture in Swing, but as I tried everything all (from SwingWorker or Runnable#Thread ) are done on EDT my questions: is there some limits or strictly depends by order of the implementations (wrapped into SwingWorker or Runnable#Thread ) ? limited is if is JComponent#method Thread Safe or not ? essential characteristic of an MVC architecture in Swing, ? inc. Container Re-Layout ? note: for my SSCCE I take one of great examples by HFOE , and maybe by

问题 I'm attempting to overlap JPanel instances. Put a panel directly on another, in the exact same position and exact size. Every time I do this it moves the other panel to the other side or underneath, the previous panel is inside another much larger one and has buttons in it. How would I do this? Keep in mind it's using the Window Builder tool. 回答1: You might also want to look at OverlayLayout, seen here. It's not included in the conventional gallery, but it may be of interest. import java.awt

问题 I have tried searching multiple time on how to format java swing elements multiple times, but I can't seem to find anything. I have tried to learn the grid bag layout but it is all too complicated. Could someone please tell me how to space swing components with Swing? Thanks! EDIT Code: import javax.swing.*; import java.awt.*; public class Format_Swing_Elemnts { public static void main(String[] args) { JLabel title = new JLabel("Bridge Settings:"); title.setFont(font); JLabel l1 = new JLabel(

问题 in the below code, i created a GridLayot with 3 rows and 3 columns, what i want to do is,,to add jpanel_1 into a specifc cell of the Gridlayout, lets say in the grid cell number (2,3). Code : private void setUpGUI2() { // TODO Auto-generated method stub jFrame_2 = new JFrame("Border Demo"); GridLayout gridLayOut = new GridLayout(3,3); jFrame_2.setLayout(gridLayOut); jPanel_1 = new JPanel(new BorderLayout()); jPanel_2 = new JPanel(new BorderLayout()); jPanel_1.setBorder(BorderFactory