java - Java Grid Layout错误的按钮大小和错误的位置

Question

我遇到了 Java Swing 应用程序的问题。

我的代码：

public class AdminToken extends JFrame {


VirtualServer server;

@Override
public Container getContentPane() {
    return super.getContentPane();
}

public AdminToken(VirtualServer server)
{
    this.server = server;
    getContentPane().setLayout(null);
    setupGUI();
   setLayout(new GridLayout(5,1));

}
void setupGUI()
{

    setTitle("Token Management Server: " + server.getName() );
    setSize(576,528);
    setVisible(true);
    setResizable(true);

    final JPanel panel = new JPanel();
    panel.setLayout(new GridLayout(5,1));
    LoginForm.api.selectVirtualServer(server);
    for( final PrivilegeKey tokens  : LoginForm.api.getPrivilegeKeys()) {

        final JLabel label =  new JLabel(tokens.getToken() + "   " + tokens.getGroupId() + "   " +  "\n");

        panel.add(label);
        JButton button = new JButton("Löschen");

        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                LoginForm.api.deletePrivilegeKey(tokens.getToken());
                panel.remove(label);
                panel.repaint();
            }
        });
        button.setVisible(true);
        button.setPreferredSize(new Dimension(87,25));
        panel.add(button);

    }
    JScrollPane scrollPane = new JScrollPane (panel,
            JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
            JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
    add(scrollPane);

    LoginForm.api.selectVirtualServerById(LoginForm.vServerId);
}

令牌应显示如下：

Token1 按钮删除\n

令牌 2 按钮删除\n

令牌 3 按钮删除 \n 等等

而且我也无法在另一个 JFrame 中更改按钮的大小：

编码：

public class TsServerOverview extends JFrame {


@Override
public Container getContentPane() {
    return super.getContentPane();
}

public TsServerOverview()
{
    getContentPane().setLayout(null);
    setupGUI();
    setLayout(new GridLayout());

}
void setupGUI()
{

    setTitle("Ts3Query Server Oveview");
    setSize(576,528);
    setVisible(true);
    setResizable(true);

    JPanel panel = new JPanel();
    panel.setLayout(new GridLayout(5,2));
    for( final VirtualServer servers : LoginForm.api.getVirtualServers()) {

        final int id = servers.getId();
       panel.add(new JLabel(servers.getId() + "    " + servers.getName() + "   " + servers.getClientsOnline() + "/" + servers.getMaxClients() + "\n"));
       JButton button = new JButton("Konsole öffnen");

        JButton showchannels = new JButton("Channel-Liste");
        JButton tokenmanagement = new JButton("Token Management");
        showchannels.setPreferredSize(new Dimension(10,10));
       button.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {
               new GUIConsole(servers);
           }
       });
       showchannels.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {
               new ChannelList(servers);
           }
       });
       tokenmanagement.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {
               new AdminToken(servers);
           }
       });
       tokenmanagement.setVisible(true);
        button.setVisible(true);
        showchannels.setVisible(true);
        panel.add(showchannels);

       panel.add(button);
       panel.add(tokenmanagement);

    }
    JScrollPane scrollPane = new JScrollPane (panel,
            JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
            JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
    add(scrollPane);
}

这也应该像这样显示：

Server1 3/32 联机启动停止控制台\n

Server2 3/32 离线启动停止控制台\n

Server3 3/32 在线启动停止控制台

按钮应该在服务器线旁边。

如果有人可以帮助我编写代码，那就太好了。

标签： javaswinglayout-managergrid-layout

Answer 1

public class AdminToken extends JFrame {   
VirtualServer server;

@Override
public Container getContentPane() {
    return super.getContentPane();
}

删除不需要证明问题的所有内容。那包含着VirtualServer

public AdminToken(VirtualServer server)
{
    this.server = server;
    getContentPane().setLayout(null);
    setupGUI();
   setLayout(new GridLayout(5,1));
}

getContentPane().setLayout并且setLayout本质上是一样的。设置两次没有用。避免空布局管理器。

void setupGUI()
{ 
    setTitle("Token Management Server: " + server.getName() );
    setSize(576,528);
    setVisible(true);
    setResizable(true);

setTitle不需要证明这个问题。无需设置大小。在适用时设置首选尺寸并让布局管理器进行布局。setResizable(true)是默认值。这同样适用于button.setVisible(true);
你通常想要setVisible(true);的最后。

    final JPanel panel = new JPanel();
    panel.setLayout(new GridLayout(5,1));

通过new GridLayout(5,1)您将网格设置为 5 行。如果你添加更多它会弄乱布局。来自java文档：

rows - 行，零值表示任意数量的行。

    LoginForm.api.selectVirtualServer(server);
    for( final PrivilegeKey tokens  : LoginForm.api.getPrivilegeKeys()) {

        final JLabel label =  new JLabel(tokens.getToken() + "   " + tokens.getGroupId() + "   " +  "\n");

        panel.add(label);
        JButton button = new JButton("Löschen");

        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                LoginForm.api.deletePrivilegeKey(tokens.getToken());
                panel.remove(label);
                panel.repaint();
            }
        });
        button.setVisible(true);
        button.setPreferredSize(new Dimension(87,25));
        panel.add(button);

    }
    JScrollPane scrollPane = new JScrollPane (panel,
            JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
            JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
    add(scrollPane);

    LoginForm.api.selectVirtualServerById(LoginForm.vServerId);
}

这是mcve展示了我认为您要实现的目标：

import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;

public class AdminToken extends JFrame {

    public AdminToken()
    {
        setupGUI();
        setVisible(true);
        setResizable(true);
        pack();
    }
    void setupGUI() {

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(0,2));

        for(int row =0; row < 6; row++ ) {
            panel.add(new JLabel("Label "+row));
            panel.add(new JButton("Delete"));
        }

        JScrollPane scrollPane = new JScrollPane (panel);
        add(scrollPane);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new AdminToken() );
    }
}