JPanel /組件擴展，當一個行動態添加 - Java Swing

Question

我已經創建了三個面板csvSrvrPanel，syncPanel和monitoringSrvrPanel。在monitoringSrvrPanel中，我有一個按鈕來添加新的texboxes行。當我點擊按鈕時，新行已經創建，但我的屏幕直到我展開它才顯示。我希望窗口在添加行時自動調整大小。

這是它的代碼。

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.Container; 
import java.awt.Dimension; 
import java.awt.Font; 
import java.awt.GridBagConstraints; 
import java.awt.GridBagLayout; 
import java.awt.GridLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 

import javax.swing.BorderFactory; 
import javax.swing.Box; 
import javax.swing.BoxLayout; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JPasswordField; 
import javax.swing.JTextField; 
import javax.swing.SwingUtilities; 
import javax.swing.border.Border; 
import javax.swing.border.TitledBorder; 

import test.FormUtility; 

public class Config implements ActionListener { 

JFrame frameConfig = null; 

JPanel comp = null; 
JPanel csvSrvrPanel, syncPanel, monitoringSrvrPanel = null; 
JPanel row = null; 

Border paneEdge = null; 
TitledBorder tbCSVServer, tbMonitoringServer, tbSync = null; 

FormUtility formUtility = null; 

/** 
* @param args 
*/ 
public static void main(String[] args) { 

    SwingUtilities.invokeLater(new Runnable() { 

     @Override 
     public void run() { 

      new Config().showConfigGUI(); 

     } 

    }); 

} 

public void showConfigGUI() { 

    frameConfig = new JFrame("Server Configurations"); 
    frameConfig.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

    comp = new JPanel(new BorderLayout()); 

    paneEdge = BorderFactory.createEmptyBorder(0, 10, 10, 10); 
    comp.setBorder(paneEdge); 

    tbCSVServer = BorderFactory.createTitledBorder("CSV server details"); 
    tbSync = BorderFactory 
      .createTitledBorder("Remote file synchronization details"); 
    tbMonitoringServer = new TitledBorder("Monitoring server details"); 

    csvSrvrPanel = new JPanel(new GridBagLayout()); 
    monitoringSrvrPanel = new JPanel(new GridBagLayout()); 
    syncPanel = new JPanel(new GridBagLayout()); 

    formUtility = new FormUtility(); 

    // Titled border 
    csvSrvrPanel.setBorder(tbCSVServer); 
    monitoringSrvrPanel.setBorder(tbMonitoringServer); 
    syncPanel.setBorder(tbSync); 

    // For CSV server details 
    formUtility.addLabel("Hostname: ", csvSrvrPanel); 
    formUtility.addLastField(new JTextField(30), csvSrvrPanel); 

    formUtility.addLabel("Username: ", csvSrvrPanel); 
    formUtility.addLastField(new JTextField(30), csvSrvrPanel); 

    formUtility.addLabel("CSV Root Folder Path: ", csvSrvrPanel); 
    formUtility.addLastField(new JTextField(30), csvSrvrPanel); 

    // For Monitoring server details 
    JPanel columnNames = new JPanel(new GridLayout(1, 0)); 
    columnNames.add(new JLabel("Server name")); 
    columnNames.add(new JLabel("Folder path")); 

    JPanel buttonPanel = new JPanel(new GridBagLayout()); 
    JButton bAddNewField = new JButton("Add new row"); 
    bAddNewField.addActionListener(this); 

    Dimension bAddNewFieldSize = bAddNewField.getPreferredSize(); 
    bAddNewFieldSize.width = 200; 
    bAddNewField.setPreferredSize(bAddNewFieldSize); 

    buttonPanel.add(bAddNewField); 

    formUtility.addLastField(buttonPanel, monitoringSrvrPanel); 
    formUtility.addLastField(columnNames, monitoringSrvrPanel); 

    row = new JPanel(new GridLayout(1, 0)); 
    row.add(new JTextField(15)); 
    row.add(new JTextField(30)); 

    formUtility.addLastField(row, monitoringSrvrPanel); 

    // For Sync panel 
    formUtility.addLabel("Remote Folder Path: ", syncPanel); 
    formUtility.addLastField(new JTextField(30), syncPanel); 

    formUtility.addLabel("Local Folder Path: ", syncPanel); 
    formUtility.addLastField(new JTextField(30), syncPanel); 

    comp.add(csvSrvrPanel, BorderLayout.NORTH); 
    comp.add(monitoringSrvrPanel, BorderLayout.CENTER); 
    comp.add(syncPanel, BorderLayout.SOUTH); 

    frameConfig.add(comp); 

    frameConfig.setLocationRelativeTo(null); 
    frameConfig.pack(); 
    frameConfig.setVisible(true); 

} 

@Override 
public void actionPerformed(ActionEvent arg0) { 
    // TODO Auto-generated method stub 

    JPanel row = new JPanel(new GridLayout(1, 0)); 
    row.add(new JTextField(15)); 
    row.add(new JTextField(30)); 

    formUtility.addLastField(row, monitoringSrvrPanel); 
    monitoringSrvrPanel.revalidate(); 


} 

} 

感謝， Tivakar

Answer 1

我會用frame.pack()觸發重新大小。