public class JPasswordField extends JTextField
JPasswordField是一个轻量级组件,允许编辑单行文本,其中视图指示输入的内容,但不显示原始字符。 
       你可以找到更多信息和示例How to Use Text Fields ,在Java教程的部分。 
        JPasswordField旨在与源兼容java.awt.TextField用于echoChar集。 它分开提供,以便更容易地安全地更改JTextField的UI,而不会影响密码条目。 
 注意:默认情况下,JPasswordField禁用输入法; 否则,输入字符在使用输入法组合时可以看到。 如果应用程序需要输入法支持,请使用继承的方法, enableInputMethods(true) 。 
警告: Swing不是线程安全的。 有关更多信息,请参阅Swing's Threading Policy 。
 警告:此类的序列化对象与将来的Swing版本不兼容。 当前的序列化支持适用于运行相同版本的Swing的应用程序之间的短期存储或RMI。 从1.4开始,对所有JavaBeans的长期存储的支持已经添加到java.beans包中。 请参阅XMLEncoder 。 
| Modifier and Type | Class and Description | 
|---|---|
| protected class  | JPasswordField.AccessibleJPasswordField
              这个类实现了可访问性支持 
              JPasswordField类。 | 
JTextField.AccessibleJTextFieldJTextComponent.AccessibleJTextComponent, JTextComponent.DropLocation, JTextComponent.KeyBindingJComponent.AccessibleJComponentContainer.AccessibleAWTContainerComponent.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategynotifyActionDEFAULT_KEYMAP, FOCUS_ACCELERATOR_KEYlistenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOWaccessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENTBOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WESTABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH| Constructor and Description | 
|---|
| JPasswordField()
              构造一个新的 
              JPasswordField,默认文档为null起始文本字符串和0列宽。 | 
| JPasswordField(Document doc, String txt, int columns)
              构造一个新的 
              JPasswordField,它使用给定的文本存储模型和给定的列数。 | 
| JPasswordField(int columns)
              构造一个新的空的 
              JPasswordField与指定的列数。 | 
| JPasswordField(String text)
              构造一个新 
              JPasswordField用指定文本初始化。 | 
| JPasswordField(String text, int columns)
              构造一个新的 
              JPasswordField,用指定的文本和列进行初始化。 | 
| Modifier and Type | Method and Description | 
|---|---|
| void | copy()
              调用 
              provideErrorFeedback当前的外观,通常会发出一个错误提示音。 | 
| void | cut()
              调用 
              provideErrorFeedback当前的外观和感觉,通常会发出一个错误提示音。 | 
| boolean | echoCharIsSet()
              如果这个 
              JPasswordField具有一个用于回JPasswordField的字符集,则返回true。 | 
| AccessibleContext | getAccessibleContext()
              返回 
              AccessibleContext与此相关JPasswordField。 | 
| char | getEchoChar()
              返回要用于回显的字符。 
             | 
| char[] | getPassword()
              返回包含在此文字 
              TextComponent。 | 
| String | getText() 
             已弃用 
               
              从Java 2平台v1.2开始,由 getPassword。 | 
| String | getText(int offs, int len) 
             已弃用 
               
              从Java 2平台v1.2开始,由 getPassword取代。 | 
| String | getUIClassID()
              返回呈现此组件的L&F类的名称。 
             | 
| protected String | paramString()
              返回此 
              JPasswordField的字符串表示JPasswordField。 | 
| void | setEchoChar(char c)
              设置此 
              JPasswordField的回音JPasswordField。 | 
| void | updateUI()
              重新加载可插拔的UI。 
             | 
actionPropertyChanged, addActionListener, configurePropertiesFromAction, createActionPropertyChangeListener, createDefaultModel, fireActionPerformed, getAction, getActionListeners, getActions, getColumns, getColumnWidth, getHorizontalAlignment, getHorizontalVisibility, getPreferredSize, getScrollOffset, isValidateRoot, postActionEvent, removeActionListener, scrollRectToVisible, setAction, setActionCommand, setColumns, setDocument, setFont, setHorizontalAlignment, setScrollOffsetaddCaretListener, addInputMethodListener, addKeymap, fireCaretUpdate, getCaret, getCaretColor, getCaretListeners, getCaretPosition, getDisabledTextColor, getDocument, getDragEnabled, getDropLocation, getDropMode, getFocusAccelerator, getHighlighter, getInputMethodRequests, getKeymap, getKeymap, getMargin, getNavigationFilter, getPreferredScrollableViewportSize, getPrintable, getScrollableBlockIncrement, getScrollableTracksViewportHeight, getScrollableTracksViewportWidth, getScrollableUnitIncrement, getSelectedText, getSelectedTextColor, getSelectionColor, getSelectionEnd, getSelectionStart, getToolTipText, getUI, isEditable, loadKeymap, modelToView, moveCaretPosition, paste, print, print, print, processInputMethodEvent, read, removeCaretListener, removeKeymap, removeNotify, replaceSelection, restoreComposedText, saveComposedText, select, selectAll, setCaret, setCaretColor, setCaretPosition, setComponentOrientation, setDisabledTextColor, setDragEnabled, setDropMode, setEditable, setFocusAccelerator, setHighlighter, setKeymap, setMargin, setNavigationFilter, setSelectedTextColor, setSelectionColor, setSelectionEnd, setSelectionStart, setText, setUI, viewToModel, writeaddAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, updateadd, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTreeaction, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCyclepublic JPasswordField()
JPasswordField ,默认文档为 
           null起始文本字符串和0列宽。 
          public JPasswordField(String text)
JPasswordField ,用指定的文本初始化。 
           文档模型设置为默认值,列数设置为0。 
          text - 要显示的文本,如果没有, 
            null 
           public JPasswordField(int columns)
JPasswordField与指定的列数。 
           创建默认模型,初始字符串设置为null 。 
          columns - 列数= 0 
           public JPasswordField(String text, int columns)
JPasswordField ,用指定的文本和列初始化。 
           文档模型设置为默认值。 
          text - 要显示的文本,如果没有, 
            null 
           columns - 列数> = 0 
           public String getUIClassID()
getUIClassID在 
            JTextField 
           JComponent.getUIClassID() , 
            UIDefaults.getUI(javax.swing.JComponent) 
           public void updateUI()
getUIClassID() 。 
           UI的类型是TextUI 。 
           invalidate在设置UI后调用。 
          public char getEchoChar()
setEchoChar(char) , 
            echoCharIsSet() 
           public void setEchoChar(char c)
JPasswordField的回波JPasswordField 。 
           请注意,这主要是一个建议,因为安装的视图可以使用任何图形技术来表示该字段。 
           设置值为0表示您希望看到类型的文本,类似于标准JTextField的行为。 
          c - 要显示的回显字符 
           echoCharIsSet() , 
            getEchoChar() 
           public boolean echoCharIsSet()
JPasswordField具有用于回JPasswordField的字符集,则返回true。 
           如果回波字符不为0,则认为该字符被设置。 
          setEchoChar(char) , 
            getEchoChar() 
           public void cut()
provideErrorFeedback当前的外观和感觉,通常会发出一个错误提示音。 
           将相关文本模型中的当前选定范围传输到系统剪贴板以及从模型中删除内容的正常行为对于密码字段是不可接受的。 
          cut在 
            JTextComponent 
           Toolkit.getSystemClipboard() , Clipboard 
           public void copy()
provideErrorFeedback当前的外观,通常会发出一个错误提示音。 
           将相关文本模型中的当前选定范围传输到系统剪贴板,并将模型中的内容传送到密码字段是不可接受的。 
          copy在 
            JTextComponent 
           Toolkit.getSystemClipboard() , Clipboard 
           @Deprecated public String getText()
getPassword 。 
          TextComponent 。 
           如果底层文件是null ,会给一个NullPointerException 。 
            出于安全考虑,此方法已被弃用。 请改用* getPassword方法。 
getText在 
            JTextComponent 
           JTextComponent.setText(java.lang.String) 
           @Deprecated public String getText(int offs, int len) throws BadLocationException
getPassword取代。 
           出于安全考虑,此方法已被弃用。 请改用getPassword方法。 
getText在 
            JTextComponent 
           offs - offset> = 0 
           len - 长度> = 0 
           BadLocationException - 如果偏移或长度无效 
           public char[] getPassword()
TextComponent 。 
           如果底层文件是null ,会给一个NullPointerException 。 
           为了更强的安全性,建议在使用后将返回的字符数组清除,将每个字符设置为零。 
          protected String paramString()
JPasswordField的字符串表示JPasswordField 。 
           该方法仅用于调试目的,并且返回的字符串的内容和格式可能因实现而异。 
           返回的字符串可能为空,但可能不是null 。 
          paramString在 
            JTextField 
           JPasswordField的字符串表示 
            JPasswordField 
           public AccessibleContext getAccessibleContext()
AccessibleContext与此相关JPasswordField 。 
           对于密码领域, AccessibleContext需要一个形式AccessibleJPasswordField 。 
           如有必要,将创建一个新的AccessibleJPasswordField实例。 
          getAccessibleContext中的 
            Accessible 
           getAccessibleContext在 
            JTextField 
           AccessibleJPasswordField作为 
            AccessibleContext这个 
            JPasswordField 
            Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
 Copyright © 1993, 2014, Oracle and/or its affiliates. All rights reserved.