Java代码 swt对话框

import java.io.File;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.printing.PrintDialog;
import org.eclipse.swt.printing.Printer;
import org.eclipse.swt.printing.PrinterData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.ColorDialog;
import org.eclipse.swt.widgets.DirectoryDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.FontDialog;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
public class DialogSample {
public static void main(String[] args) {
   final Display display = new Display();
   final Shell shell = new Shell(display);
   shell.setLayout( new GridLayout());
   shell.setText("Dialog Sample");
  
   Button b1 = new Button ( shell,SWT.NONE);
   b1.setText("消息提示框");
   b1.addSelectionListener( new SelectionAdapter(){
    public void widgetSelected(SelectionEvent e) {
     //创建消息框对象，使用警告图标并显示是和否按钮
     MessageBox box = new MessageBox( shell ,SWT.ICON_ERROR|SWT.YES|SWT.NO);
     //设置对话框的标题
     box.setText("错误消息对话框");
     //设置对话框显示的消息
     box.setMessage("读取文件发生错误!");
     //打开对话框，将返回值赋给choice
     int choice = box.open();
     //打印出所选择的值
     if (choice==SWT.YES)
      System.out.print("Yes");
     else if ( choice==SWT.NO)
      System.out.print("No");
    }
   
   });
  
   Button b2 = new Button ( shell,SWT.NONE);
   b2.setText("目录选取对话框");
   b2.addSelectionListener( new SelectionAdapter(){
    public void widgetSelected(SelectionEvent e) {
     DirectoryDialog dialog = new DirectoryDialog(shell);
     //设置显示在窗口上方的提示信息
     dialog.setMessage("请选择所要保存的文件夹");
     //设置对话框的标题
     dialog.setText("选择文件目录");
     //设置打开时默认的文件目录
     dialog.setFilterPath("C:\\");
     //打开窗口，返回用户所选的文件目录
     String saveFile = dialog.open();
     if ( saveFile != null )
     {
      //创建一个File对象
      File directory = new File(saveFile);
      System.out.print(directory.getPath());
     }
    }
   });
  
   Button b3 = new Button ( shell,SWT.NONE);
   b3.setText("文件open对话框");
   b3.addSelectionListener( new SelectionAdapter(){
    public void widgetSelected(SelectionEvent e) {
     //创建一个打开对话框，样式设置为SWT.OPEN，其他也可以是SWT.SAVE、SWT.MULTI
     FileDialog dialog = new FileDialog(shell,SWT.OPEN);
     //设置打开默认的路径
     dialog.setFilterPath(System.getProperty("java.home"));
     //设置所打开文件的扩展名
     dialog.setFilterExtensions(new String[] {"*.txt", "*.*"});
     //设置显示到下拉框中的扩展名的名称
     dialog.setFilterNames( new String[]{"Text Files (*.txt)", "All Files (*.*)"});
     //打开窗口，返回用户所选的文件目录
     String file = dialog.open();
     if ( file != null )
     {
      System.out.print(file);
     }
    }
   });
  
   Button b5 = new Button ( shell,SWT.NONE);
   b5.setText("文件save对话框");
   b5.addSelectionListener( new SelectionAdapter(){
    public void widgetSelected(SelectionEvent e) {
     //创建一个打开对话框，样式设置为SWT.OPEN，其他也可以是SWT.SAVE、SWT.MULTI
     FileDialog dialog = new FileDialog(shell,SWT.SAVE);
     //设置打开默认的路径
     dialog.setFilterPath(System.getProperty("java.home"));
     //设置所打开文件的扩展名
     dialog.setFilterExtensions(new String[] {"*.txt", "*.*"});
     //设置显示到下拉框中的扩展名的名称
     dialog.setFilterNames( new String[]{"Text Files (*.txt)", "All Files (*.*)"});
     //打开窗口，返回用户所选的文件目录
     String file = dialog.open();
     if ( file != null )
     {
      System.out.print(file);
     }
    }
   });
   Button b4 = new Button ( shell,SWT.NONE);
   b4.setText("颜色对话框");
   b4.addSelectionListener( new SelectionAdapter(){
    public void widgetSelected(SelectionEvent e) {
     //创建一个颜色对话框
     ColorDialog dialog = new ColorDialog(shell);
     //设置默认选中的颜色
     dialog.setRGB( new RGB( 255 ,255 ,128));
     //打开对话框，将选中的颜色返回给rgb对象
     RGB rgb = dialog.open();
     if ( rgb != null )
     {
      System.out.print(rgb);
      //创建颜色对象
      Color color = new Color( display , rgb );
      //在使用完颜色对象后，释放资源
      color.dispose();
     
     }
    }
   });
  
   Button b55 = new Button ( shell,SWT.NONE);
   b55.setText("字体对话框");
   b55.addSelectionListener( new SelectionAdapter(){
    public void widgetSelected(SelectionEvent e) {
     //创建一个字体对话框
     FontDialog dialog = new FontDialog (shell);
     //设置默认选中的颜色
     dialog.setRGB( new RGB( 255 ,255 ,128));
     //打开对话框，将选中的字体返回给fontData对象
     FontData fontData = dialog.open();
     if ( fontData != null )
     {
      System.out.print(fontData);
      //创建颜色对象
      Font font = new Font( display , fontData );
      //在使用完字体对象后，释放资源
      font.dispose();
     }
    }
   });
  
   Button b6 = new Button ( shell,SWT.NONE);
   b6.setText("打印对话框");
   b6.addSelectionListener( new SelectionAdapter(){
    public void widgetSelected(SelectionEvent e) {
     //创建一个打印对话框
     PrintDialog dialog = new PrintDialog (shell);
     //打开对话框，将选中的字体返回给fontData对象
     PrinterData printData = dialog.open();
     if ( printData != null )
     {
      //创建打印对象
      Printer printer = new Printer( printData );
      //在使用打印对象后，释放资源
      printer.dispose();
     }
    }
   });
  
   //shell.setSize(200, 150);
   shell.pack();
   shell.open();
   while (!shell.isDisposed()) {
    if (!display.readAndDispatch())
     display.sleep();
   }
   display.dispose();
}
}