想做一个好看些的界面。但是现在有些地方显示不正常。主要为程序上方得输入框和及文字并没有充满整个frame,而只是居中设置得。请各位看看如何调整。谢谢～～源代码如下：由于字数限制，分成两个帖子。
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.io.File;import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JSeparator;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.border.EmptyBorder;
import javax.swing.border.EtchedBorder;public class Viewer
{
// static fields:
private static final String VERSION = "Version 3.1";
private static JFileChooser fileChooser = new JFileChooser(System.getProperty("user.dir")); // fields:
private JFrame frame;
private NetworkImage imagePanel;
private JLabel filenameLabel;
private JLabel statusLabel;
private JButton smallerButton;
private JButton largerButton;
private JButton mouse;
private JTextField startVertex;
private JTextField communitySize;
private JProgressBar progressBar;
private JButton startRun;
/**
* Create an ImageViewer and display its GUI on screen.
*/
public Viewer()
{
makeFrame();
}
// ---- implementation of menu functions ----
/**
* Open function: open a file chooser to select a new image file,
* and then display the chosen image.
*/
private void openFile()
{
System.out.println("openFile");
setButtonsEnabled(true);
// showFilename(selectedFile.getPath());
showStatus("File loaded.");
frame.pack();
} /**
* Close function: close the current image.
*/
private void close()
{
System.out.println("Close");
setButtonsEnabled(false);
} /**
* Save As function: save the current image to a file.
*/
private void saveAs()
{
System.out.println("saveAs");
} /**
* Quit function: quit the application.
*/
private void quit()
{
System.exit(0);
}
private void showAbout()
{
JOptionPane.showMessageDialog(frame,
"Local Community Finder\n " +
"sdqwdswqdqwqw\n" +
"wsdqwqwqwqwwdsq\n" +
"qwdqwdwqdqwdqw\n" +
VERSION,
"About Helpwswswqswsw\n",
JOptionPane.INFORMATION_MESSAGE);
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.io.File;import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JSeparator;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.border.EmptyBorder;
import javax.swing.border.EtchedBorder;public class Viewer
{
// static fields:
private static final String VERSION = "Version 3.1";
private static JFileChooser fileChooser = new JFileChooser(System.getProperty("user.dir")); // fields:
private JFrame frame;
private NetworkImage imagePanel;
private JLabel filenameLabel;
private JLabel statusLabel;
private JButton smallerButton;
private JButton largerButton;
private JButton mouse;
private JTextField startVertex;
private JTextField communitySize;
private JProgressBar progressBar;
private JButton startRun;
/**
* Create an ImageViewer and display its GUI on screen.
*/
public Viewer()
{
makeFrame();
}
// ---- implementation of menu functions ----
/**
* Open function: open a file chooser to select a new image file,
* and then display the chosen image.
*/
private void openFile()
{
System.out.println("openFile");
setButtonsEnabled(true);
// showFilename(selectedFile.getPath());
showStatus("File loaded.");
frame.pack();
} /**
* Close function: close the current image.
*/
private void close()
{
System.out.println("Close");
setButtonsEnabled(false);
} /**
* Save As function: save the current image to a file.
*/
private void saveAs()
{
System.out.println("saveAs");
} /**
* Quit function: quit the application.
*/
private void quit()
{
System.exit(0);
}
private void showAbout()
{
JOptionPane.showMessageDialog(frame,
"Local Community Finder\n " +
"sdqwdswqdqwqw\n" +
"wsdqwqwqwqwwdsq\n" +
"qwdqwdwqdqwdqw\n" +
VERSION,
"About Helpwswswqswsw\n",
JOptionPane.INFORMATION_MESSAGE);
/**
* Show a message in the status bar at the bottom of the screen.
* @param text The status message.
*/
private void showStatus(String text)
{
statusLabel.setText(text);
}
/**
* Enable or disable all toolbar buttons.
*
* @param status 'true' to enable the buttons, 'false' to disable.
*/
private void setButtonsEnabled(boolean status)
{
smallerButton.setEnabled(status);
largerButton.setEnabled(status);
}
// ---- Swing stuff to build the frame and all its components and menus ----
/**
* Create the Swing frame and its content.
*/
private void makeFrame()
{
frame = new JFrame("Local Community Finder");
JPanel contentPane = (JPanel)frame.getContentPane();
contentPane.setBorder(new EmptyBorder(6, 6, 6, 6)); makeMenuBar(frame);
// Specify the layout manager with nice spacing
contentPane.setLayout(new BorderLayout(6, 6));
// Create the image pane in the center
imagePanel = new NetworkImage();
imagePanel.setBorder(new EtchedBorder());
contentPane.add(imagePanel, BorderLayout.CENTER); // Create two menua and some necessary information
// filenameLabel = new JLabel();
// contentPane.add(filenameLabel, BorderLayout.NORTH);
//create the search and relevant text field
JPanel searchPanel = new JPanel();
GridBagConstraints constraints;
GridBagLayout layout = new GridBagLayout();
searchPanel.setLayout(layout); JLabel startLabel = new JLabel("Start Vertex:");
constraints = new GridBagConstraints();
constraints.anchor = GridBagConstraints.EAST;
constraints.insets = new Insets(5, 5, 0, 0);
layout.setConstraints(startLabel, constraints);
searchPanel.add(startLabel); startVertex = new JTextField();
constraints = new GridBagConstraints();
constraints.fill = GridBagConstraints.HORIZONTAL;
constraints.gridwidth = GridBagConstraints.REMAINDER;
constraints.insets = new Insets(5, 5, 0, 5);
layout.setConstraints(startVertex, constraints);
searchPanel.add(startVertex); JLabel maxLabel = new JLabel("Max Commmunity Size:");
constraints = new GridBagConstraints();
constraints.anchor = GridBagConstraints.EAST;
constraints.insets = new Insets(5, 5, 0, 0);
layout.setConstraints(maxLabel, constraints);
searchPanel.add(maxLabel); communitySize = new JTextField();
constraints = new GridBagConstraints();
constraints.fill = GridBagConstraints.HORIZONTAL;
constraints.gridwidth = GridBagConstraints.REMAINDER;
constraints.insets = new Insets(5, 5, 0, 5);
layout.setConstraints(communitySize, constraints);
searchPanel.add(communitySize);
JLabel progressLabel = new JLabel("Community Detecting Progress:");
constraints = new GridBagConstraints();
constraints.anchor = GridBagConstraints.EAST;
constraints.insets = new Insets(5, 5, 0, 0);
layout.setConstraints(progressLabel, constraints);
searchPanel.add(progressLabel);
progressBar = new JProgressBar();
progressBar.setMinimum(0);
progressBar.setStringPainted(true);
constraints = new GridBagConstraints();
constraints.fill = GridBagConstraints.HORIZONTAL;
constraints.gridwidth = GridBagConstraints.REMAINDER;
constraints.insets = new Insets(5, 5, 0, 5);
layout.setConstraints(progressBar, constraints);
searchPanel.add(progressBar);
startRun = new JButton("Search");
startRun.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
actionSearch();
}
});
constraints = new GridBagConstraints();
constraints.gridwidth = GridBagConstraints.REMAINDER;
constraints.insets = new Insets(5, 5, 5, 5);
layout.setConstraints(startRun, constraints);
searchPanel.add(startRun);
contentPane.add(searchPanel, BorderLayout.NORTH);
JSeparator separator = new JSeparator();
constraints = new GridBagConstraints();
constraints.fill = GridBagConstraints.HORIZONTAL;
constraints.gridwidth = GridBagConstraints.REMAINDER;
constraints.insets = new Insets(5, 5, 5, 5);
layout.setConstraints(separator, constraints);
searchPanel.add(separator);
statusLabel = new JLabel(VERSION);
contentPane.add(statusLabel, BorderLayout.SOUTH);
// Create the toolbar with the buttons
JPanel toolbar = new JPanel();
toolbar.setLayout(new GridLayout(0, 1));
smallerButton = new JButton("Smaller");
smallerButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { makeSmaller(); }
});
toolbar.add(smallerButton);
largerButton = new JButton("Larger");
largerButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { makeLarger(); }
});
toolbar.add(largerButton);
// Add toolbar into panel with flow layout for spacing
JPanel flow = new JPanel();
flow.add(toolbar);
contentPane.add(flow, BorderLayout.WEST);
setButtonsEnabled(false);
frame.pack();
// place the frame at the center of the screen and show
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
frame.setLocation(d.width/2 - frame.getWidth()/2, d.height/2 - frame.getHeight()/2);
frame.setVisible(true);
}
/**
* Create the main frame's menu bar.
*
* @param frame The frame that the menu bar should be added to.
*/
private void makeMenuBar(JFrame frame)
{
final int SHORTCUT_MASK =
Toolkit.getDefaultToolkit().getMenuShortcutKeyMask(); JMenuBar menubar = new JMenuBar();
frame.setJMenuBar(menubar);
JMenu menu;
JMenuItem item;
// create the File menu
menu = new JMenu("Control");
menubar.add(menu);
item = new JMenuItem("Open Result File");
item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, SHORTCUT_MASK));
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { openFile(); }
});
menu.add(item); item = new JMenuItem("Close");
item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, SHORTCUT_MASK));
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { close(); }
});
menu.add(item);
menu.addSeparator();
item = new JMenuItem("Quit");
item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q, SHORTCUT_MASK));
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { quit(); }
});
menu.add(item); // create the Help menu
menu = new JMenu("Help");
menubar.add(menu);
item = new JMenuItem("About Community Finder...");
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { showAbout(); }
});
menu.add(item);
}
private void actionSearch(){
}
private void makeSmaller(){
System.out.println("MakeSmaller");
}
private void makeLarger(){
System.out.println("makeLarger");
}
public static void main(String args[]){
Viewer image = new Viewer();
}
}