在对话框中对齐复选框

Question

我想对齐复选框（红色高亮区域）根据其他各个字段。

这是我使用产生这种

public class DialogTesting extends JFrame{ 

public static void main(String args[]) 
{ 

    JFrame frame = new JFrame(); 
    frame.setSize(320,250); 
    frame.setLocation(400,400); 

    JTextField txtUserName,txtHostName,txtPortNo,txtSID; 
    JPasswordField txtPassword; 
    JPanel mainPanel; 
    JCheckBox chkBoxSaveConnection; 

    mainPanel = new JPanel(); 
    mainPanel.setBorder(BorderFactory.createEmptyBorder()); 
    mainPanel.setPreferredSize(new Dimension(300, 210)); 
    mainPanel.setLayout(new FlowLayout()); 


    JLabel l_label = null; 
    txtUserName = new JTextField("K_USERNAME", 15); 
    txtUserName.putClientProperty("maxlength", 200); 
    l_label = new JLabel("User Name"); 
    l_label.setPreferredSize(new Dimension(100, 30)); 
    mainPanel.add(l_label); 
    mainPanel.add(txtUserName); 

    txtPassword = new JPasswordField("K_PASSWORD", 15); 
    txtUserName.putClientProperty("maxlength", 200); 
    l_label = new JLabel("Password"); 
    l_label.setPreferredSize(new Dimension(100, 30)); 
    mainPanel.add(l_label); 
    mainPanel.add(txtPassword); 

    txtHostName = new JTextField("K_HOSTNAME", 15); 
    txtHostName.putClientProperty("maxlength", 200); 
    l_label = new JLabel("Host Name"); 
    l_label.setPreferredSize(new Dimension(100, 30)); 
    mainPanel.add(l_label); 
    mainPanel.add(txtHostName); 

    txtPortNo = new JTextField("K_PORTNO", 15); 

    l_label = new JLabel("Port Number"); 
    l_label.setPreferredSize(new Dimension(100, 30)); 
    txtPortNo.putClientProperty("maxlength", 200); 
    mainPanel.add(l_label); 
    mainPanel.add(txtPortNo); 


    txtSID = new JTextField("K_SID", 15); 
    l_label = new JLabel("SID number"); 
    l_label.setPreferredSize(new Dimension(100, 30)); 
    txtPortNo.putClientProperty("maxlength", 200); 
    mainPanel.add(l_label); 
    mainPanel.add(txtSID); 

    chkBoxSaveConnection = new JCheckBox(); 
    l_label = new JLabel("chkBoxSaveConnection"); 
    l_label.setPreferredSize(new Dimension(150, 30)); 
    mainPanel.add(l_label); 
    mainPanel.add(chkBoxSaveConnection); 

    mainPanel.setVisible(true); 

    frame.add(mainPanel); 
    frame.setVisible(true); 

} 
} 

在这里，我想让复选框（红色突出显示区域）按照其他领域

我想这对准主要方法解决方案，使其正确对齐

mainPanel.setLayout(new GridLayout()); 
GridBagConstraints l_bag_constraints = new GridBagConstraints(); 
l_bag_constraints.fill = GridBagConstraints.HORIZONTAL; 
mainPanel.add(jlabel,FieldMapperHelper.getGridBagCompPosition(l_bag_constraints,0,0,10,1,0,10) 
      ); 
    mainPanel.add(txtUserName 
      ,FieldMapperHelper.getGridBagCompPosition(l_bag_constraints,0,1,10,1,0,10) 
      ); 

但在这种情况下它显示了我非常小的文本框。

请让我知道，如果你想除了它之外的任何东西。

Answer 1

好的，所以你的问题是你不使用适当的LayoutManager，你也不得不设置首选大小（你应该永远不要这样做）。

这里是你的代码的更新版本，它采用GridBagLayout而且应该很好地工作：

import java.awt.GridBagConstraints; 
import java.awt.GridBagLayout; 
import java.awt.Insets; 

import javax.swing.JCheckBox; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JPasswordField; 
import javax.swing.JTextField; 
import javax.swing.SwingUtilities; 

public class DialogTesting { 

    protected void initUI() { 

     JFrame frame = new JFrame(); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

     JTextField txtUserName, txtHostName, txtPortNo, txtSID; 
     JPasswordField txtPassword; 
     JPanel mainPanel; 
     JCheckBox chkBoxSaveConnection; 

     GridBagConstraints firstCol = new GridBagConstraints(); 
     firstCol.weightx = 1.0; 
     firstCol.anchor = GridBagConstraints.WEST; 
     firstCol.insets = new Insets(5, 20, 5, 5); 

     GridBagConstraints lastCol = new GridBagConstraints(); 
     lastCol.gridwidth = GridBagConstraints.REMAINDER; 
     lastCol.weightx = 1.0; 
     lastCol.fill = GridBagConstraints.HORIZONTAL; 
     lastCol.insets = new Insets(5, 5, 5, 20); 

     mainPanel = new JPanel(new GridBagLayout()); 

     JLabel l_label = null; 
     txtUserName = new JTextField("K_USERNAME", 15); 
     txtUserName.putClientProperty("maxlength", 200); 
     l_label = new JLabel("User Name"); 
     mainPanel.add(l_label, firstCol); 
     mainPanel.add(txtUserName, lastCol); 

     txtPassword = new JPasswordField("K_PASSWORD", 15); 
     txtUserName.putClientProperty("maxlength", 200); 
     l_label = new JLabel("Password"); 
     mainPanel.add(l_label, firstCol); 
     mainPanel.add(txtPassword, lastCol); 

     txtHostName = new JTextField("K_HOSTNAME", 15); 
     txtHostName.putClientProperty("maxlength", 200); 
     l_label = new JLabel("Host Name"); 
     mainPanel.add(l_label, firstCol); 
     mainPanel.add(txtHostName, lastCol); 

     txtPortNo = new JTextField("K_PORTNO", 15); 

     l_label = new JLabel("Port Number"); 
     txtPortNo.putClientProperty("maxlength", 200); 
     mainPanel.add(l_label, firstCol); 
     mainPanel.add(txtPortNo, lastCol); 

     txtSID = new JTextField("K_SID", 15); 
     l_label = new JLabel("SID number"); 
     txtPortNo.putClientProperty("maxlength", 200); 
     mainPanel.add(l_label, firstCol); 
     mainPanel.add(txtSID, lastCol); 

     chkBoxSaveConnection = new JCheckBox(); 
     l_label = new JLabel("chkBoxSaveConnection"); 
     mainPanel.add(l_label, firstCol); 
     mainPanel.add(chkBoxSaveConnection, lastCol); 

     frame.add(mainPanel); 
     frame.pack(); 
     frame.setLocationRelativeTo(null); 
     frame.setVisible(true); 
    } 

    public static void main(String args[]) { 
     SwingUtilities.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       new DialogTesting().initUI(); 
      } 
     }); 
    } 
}