一个用JAVA编写的记事本.rar_java 记事本_java小记事本_用Java做一个记_记事本 java_记事本程序

import java.io.*; import java.io.*; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.*; public class SimpleSWTTextEditor { private org.eclipse.swt.widgets.Shell sShell = null; private Text textArea = null; private Button button = null; private Button button1 = null; private Button button2 = null; private boolean hasChanged = false; private static final String title = "Simple SWT Text Editor"; private static final String NEW_LINE = System.getProperty("line.separator"); public static void main(String[] args) { org.eclipse.swt.widgets.Display display = org.eclipse.swt.widgets.Display .getDefault(); SimpleSWTTextEditor thisClass = new SimpleSWTTextEditor(); thisClass.createSShell(); thisClass.sShell.open(); while (!thisClass.sShell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } /** * This method initializes sShell */ private void createSShell() { sShell = new org.eclipse.swt.widgets.Shell(); org.eclipse.swt.layout.GridLayout gridLayout2 = new GridLayout(); org.eclipse.swt.layout.GridData gridData3 = new org.eclipse.swt.layout.GridData(); org.eclipse.swt.layout.GridData gridData4 = new org.eclipse.swt.layout.GridData(); org.eclipse.swt.layout.GridData gridData5 = new org.eclipse.swt.layout.GridData(); org.eclipse.swt.layout.GridData gridData6 = new org.eclipse.swt.layout.GridData(); textArea = new Text(sShell, SWT.MULTI | SWT.WRAP | SWT.V_SCROLL | SWT.BORDER); button = new Button(sShell, SWT.NONE); button1 = new Button(sShell, SWT.NONE); button2 = new Button(sShell, SWT.NONE); sShell.setText(title); sShell.setLayout(gridLayout2); gridLayout2.numColumns = 3; gridLayout2.makeColumnsEqualWidth = false; gridData3.horizontalSpan = 3; gridData3.horizontalAlignment = org.eclipse.swt.layout.GridData.FILL; gridData3.verticalAlignment = org.eclipse.swt.layout.GridData.FILL; gridData3.grabExcessHorizontalSpace = true; gridData3.grabExcessVerticalSpace = true; textArea.setLayoutData(gridData3); button.setText("Load File"); button.setLayoutData(gridData4); button1.setText("Save File"); button1.setLayoutData(gridData5); button2.setText("Exit"); button2.setLayoutData(gridData6); gridData4.horizontalAlignment = org.eclipse.swt.layout.GridData.END; gridData4.verticalAlignment = org.eclipse.swt.layout.GridData.CENTER; gridData4.grabExcessHorizontalSpace = true; gridData5.horizontalAlignment = org.eclipse.swt.layout.GridData.CENTER; gridData5.verticalAlignment = org.eclipse.swt.layout.GridData.CENTER; gridData6.grabExcessHorizontalSpace = true; sShell.setSize(new org.eclipse.swt.graphics.Point(393, 279)); textArea.addModifyListener(new org.eclipse.swt.events.ModifyListener() { public void modifyText(org.eclipse.swt.events.ModifyEvent e) { if (!hasChanged) { sShell.setText(title + " *"); //$NON-NLS-1$ hasChanged = true; } } }); button2.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() { public void widgetSelected( org.eclipse.swt.events.SelectionEvent e) { doExit(); } }); button1.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() { public void widgetSelected( org.eclipse.swt.events.SelectionEvent e) { saveFile(); } }); button.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() { public void widgetSelected( org.eclipse.swt.events.SelectionEvent e) { loadFile(); } }); sShell.addShellListener(new org.eclipse.swt.events.ShellAdapter() { public void shellClosed(org.eclipse.swt.events.ShellEvent e) { e.doit = doExit(); } }); } private void loadFile() { FileDialog dialog = new FileDialog(sShell, SWT.OPEN); String result = dialog.open(); if (result != null) { File f = new File(result); try { BufferedReader br = new BufferedReader(new FileReader(f)); StringBuffer buff = new StringBuffer(); String line = br.readLine(); while (line != null) { buff.append(line + NEW_LINE); line = br.readLine(); } textArea.setText(buff.toString()); br.close(); sShell.setText(title); hasChanged = false; } catch (FileNotFoundException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } } } private void saveFile() { FileDialog dialog = new FileDialog(sShell, SWT.SAVE); String result = dialog.open(); if (result != null) { File f = new File(result); try { BufferedWriter bw = new BufferedWriter(new FileWriter(f)); String text = textArea.getText(); bw.write(text); bw.close(); sShell.setText(title); hasChanged = false; } catch (FileNotFoundException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } } } private boolean doExit() { if (hasChanged) { MessageBox mb = new MessageBox(sShell, SWT.ICON_QUESTION | SWT.YES | SWT.NO | SWT.CANCEL); mb.setText("Save Changes?"); mb.setMessage("File has been changed. Save before exit?"); int state = mb.open(); if (state == SWT.YES) { saveFile(); } else if (state == SWT.CANCEL) { return false; } } sShell.close(); sShell.dispose(); return true; } }