如何在JFrame / java中从右到左对齐？

Question

I wrote this code, but I'm having a problem with making it align from right to left. I tried several things, but none of them works. I know it can be done by playing with the coordinates, but I want a way that I wouldn't need to do that for every word. How am I supposed to do it the right way?

code:

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



public class GUI {
//messages 
public static final String ConnectC_MSG    = "התחבר"    ;
public static final String DisconnectC_MSG = "התנתק"    ;
public static final String ServerLBL_MSG   = "שרת יעד:"  ;
public static final String UsernameLBL_MSG = ":שם משתמש";
public static final String PasswordLBL_MSG = ":סיסמא"   ;
public static final String PortLBL_MSG     = ":פתחה"    ;
//sizes
public static final int SreverTxtfield_Width   = 10;
public static final int UsernameTxtfield_width = 10;
public static final int PasswordTxtfield_width = 10;
public static final int PortTxtfield_width     = 5 ;
public static final int WINDOW_WIDTH  = 800;
public static final int WINDOW_HEIGHT = 200;


static JFrame frame1;
static Container pane;

static JButton btnConnect = new JButton(ConnectC_MSG),
               btiDiscinnect = new JButton(DisconnectC_MSG);
static JLabel lblServer   = new JLabel(ServerLBL_MSG),
              lblUsername = new JLabel(UsernameLBL_MSG),
              lblPassword = new JLabel(PasswordLBL_MSG),
              lblPort     = new JLabel(PortLBL_MSG);

static JTextField txtServer   = new JTextField(SreverTxtfield_Width),
                  txtUsername = new JTextField(UsernameTxtfield_width),
                  txtPort     = new JTextField(PortTxtfield_width);

static JPasswordField txtPassword = new JPasswordField(PasswordTxtfield_width);

static Insets insets;


public static void main(String[] args) {
    frame1 = new JFrame ("הדגמה");
    frame1.setSize(WINDOW_WIDTH,WINDOW_HEIGHT);
    frame1.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
    pane = frame1.getContentPane();
    pane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);

    insets = pane.getInsets();
    pane.setLayout(null);   
    pane.add(lblServer);
    pane.add(lblUsername);
    pane.add(lblPassword);
    pane.add(lblPort);
    pane.add(txtServer);
    pane.add(txtUsername);
    pane.add(txtPassword);
    pane.add(txtPort);
    lblServer.setBounds((int)(insets.right),insets.top,
            lblServer.getPreferredSize().width, lblServer.getPreferredSize().height);
    txtServer.setBounds(lblServer.getX()+lblServer.getWidth(), lblServer.getY()+lblServer.getHeight(),
            txtServer.getPreferredSize().width, txtServer.getPreferredSize().height);

    frame1.setVisible(true);

}

}

Answer 1

Try something like:

JPanel panel = new JPanel( new FlowLayout(FlowLayout.RIGHT) );
panel.add(...);
panel.add(...);
...
frame.add(panel, BorderLayout.NORTH);

and the components will align to the ride side of the frame.

Also, get rid of all the static variables. That is NOT the way to write a class.

Read the section from the Swing tutorial on How to Use Flow Layout for more information and examples. If will show you a better way to structure your class without all the static stuff.

Answer 2

Try

  pane = new JPanel();

in place of

 pane = frame1.getContentPane();

and remove this line

pane.setLayout(null);   

and finally add pane to JFrame

 frame1.getContentPane().add(pane);