代码如下:复制代码 代码如下:package swt_jface.demo11; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.lang.reflect.InvocationTargetException; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.action.StatusLineManager; import org.eclipse.jface.action.ToolBarManager; import org.eclipse.jface.operation.IRunnableWithProgress; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.window.ApplicationWindow; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widg编程客栈ets.Shell; import org.eclipse.swt.widgets.Text; public class FileViewer extends ApplicationWindow { Text text; String content; String lineDelimiter; IRunnableWithProgress runnableWithProgress = new IRunnableWithProgress() { public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException { System.out.println("Running from thread: " + Thread.currentThread().getName()); getShell().getDisplay().syncExec(new Runnable() { public void run() { content = text.getText(); lineDelimiter = text.getLineDelimiter(); } }); monitor.beginTask("Counting total number of lines", content.length()); int lines = 1; for(int i=0; i<content.length(); i++) { if(monitor.isCanceled()) { monitor.done(); System.out.pri开发者_Js入门ntln("Action cancelled"); return; } if(i + lineDelimiter.length() < content.length()) { if(lineDelimiter.equals(content.substring(i, i+lineDelimiter.length()))) { lines ++; } } monitor.worked(1); Thread.sleep(1); } monitor.done(); System.out.println("Total number of lines: " + lines); } }; Action actionCount = new Action("Count", ImageDescriptor.createFromFile(null, "C:/icons/run.gif")) { public void run() { try { FileViewer.this.run(true, true, runnableWithProgress); } catch (InvocationTargetException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); MvuKfmLFP } } }; public FileViewer(Shell parentShell) { super(parentShell); addMenuBar(); addStatusLine(); addToolBar(SWT.FLAT); } &nwww.devze.combsp; protected Control createContents(Composite parent) { getShell().setText("FileViewer v2.0"); setStatus("Ready"); text = new Text(parent, SWT.MULTI | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL); text.setSize(300, 200); return text; } Action actionOpenFile = new Action("Open", ImageDescriptor.createFromFile(null, "C:/icons/open.gif")) { public void run() { FileDialog dialog = new FileDialog(getShell(), SWT.OPEN); final String file = dialog.open(); if(file != null) { try { String content = readFileAsAString(new File(file)); text.setText(content); setStatus("File loaded successfully: " + file); } catch (IOException e) { e.printStackTrace(); setStatus("Failed to load file: " + file); } } } }; protected MenuManager createMenuManager() { MenuManager menuManager = new MenuManager(""); MenuManager fileMenuManager = new MenuManager("&File"); fileMenuManager.add(actionOpenFile); menuManager.add(fileMenuManager); MenuManager toolsMenuManager = new MenuManager("&Tools"); toolsMenuManager.add(actionCount); menuManager.add(toolsMenuManager); return menuManager; } protected StatusLineManager createStatusLineManager() { return super.createStatusLineManager(); } protected ToolBarManager createToolBarManager(int style) { ToolBarManager toolBarManager = new ToolBarManager(style); toolBarManager.add(actionOpenFile); toolBarManager.add(actionCount); return toolBarManager; } public static void main(String[] args) { ApplicationWindow viewer = new FileViewer(null); viewer.setBlockOnOpen(true); viewer.open(); } public static String readFileAsAString(File file) throws IOException { return new String(getBytesFromFile(file)); } public static byte[] getBytesFromFile(File file) throws IOException { InputStream is = new FileInputStream(file); long length = file.length(); if (length > Integer.MAX_VALUE) { throw new IllegalArgumentException("File is too large! (larger or equal to 2G)"); } byte[] bytes = new byte[(int) length]; int offset = 0; int numRead = 0; while (offset < bytes.length && (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) { offset += numRead; } if (offset < bytes.length) { throw new IOException( &nbshttp://www.devze.comp; "Could not completely read file " + file.getName()); } is.close();  http://www.devze.com; return bytes; } }
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