Java javax.swing 类 JPasswordField（JDK5）

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摘要： 嵌套 | 字段 | 构造方法 | 方法	详细信息： 字段 | 构造方法 | 方法

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javax.swing
类 JPasswordField

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              javax.swing.text.JTextComponent
                  javax.swing.JTextField
                      javax.swing.JPasswordField

所有已实现的接口：

ImageObserver, MenuContainer, Serializable, Accessible, Scrollable, SwingConstants

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public class JPasswordField
   
   
   
   
   
extends JTextField
   
   
   
   
   

JPasswordField 是一个轻量级组件，允许编辑一个单行文本，其视图指示键入内容，但不显示原始字符。有关更多信息和示例，请参阅《The Java Tutorial》中的 How to Use Text Fields 一节。

JPasswordField 与使用 echoChar 设置的 java.awt.TextField 是根本一致的。单独提供它可以较方便地安全更改 JTextField 的 UI 而不影响密码输入。

警告：此类的序列化对象将与以后的 Swing 版本不兼容。当前的序列化支持适用于短期存储或运行相同 Swing 版本的应用程序之间的 RMI。从 1.4 版本开始，已在 java.beans 包中添加了支持所有 JavaBeans^TM 长期存储的功能。请参见 XMLEncoder。

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嵌套类摘要
protected  class	JPasswordField.AccessibleJPasswordField           此类实现对 JPasswordField 类的可访问性支持。

 

从类 javax.swing.JTextField 继承的嵌套类/接口
JTextField.AccessibleJTextField

 

从类 javax.swing.text.JTextComponent 继承的嵌套类/接口
JTextComponent.AccessibleJTextComponent, JTextComponent.KeyBinding

 

从类 javax.swing.JComponent 继承的嵌套类/接口
JComponent.AccessibleJComponent

 

从类 java.awt.Container 继承的嵌套类/接口
Container.AccessibleAWTContainer

 

从类 java.awt.Component 继承的嵌套类/接口
Component.AccessibleAWTComponent, Component.BltBufferStrategy, Component.FlipBufferStrategy

 

字段摘要

 

从类 javax.swing.JTextField 继承的字段
notifyAction

 

从类 javax.swing.text.JTextComponent 继承的字段
DEFAULT_KEYMAP, FOCUS_ACCELERATOR_KEY

 

从类 javax.swing.JComponent 继承的字段
accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

 

从类 java.awt.Component 继承的字段
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

 

从接口 javax.swing.SwingConstants 继承的字段
BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

 

从接口 java.awt.image.ImageObserver 继承的字段
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

 

构造方法摘要
JPasswordField()           构造一个新 JPasswordField，使其具有默认文档、为 null 的开始文本字符串和为 0 的列宽度。
JPasswordField(Document doc, String txt, int columns)           构造一个使用给定文本存储模型和给定列数的新 JPasswordField。
JPasswordField(int columns)           构造一个具有指定列数的新的空 JPasswordField。
JPasswordField(String text)           构造一个利用指定文本初始化的新 JPasswordField。
JPasswordField(String text, int columns)           构造一个利用指定文本和列初始化的新 JPasswordField。

 

方法摘要
void	copy()           对当前外观调用 provideErrorFeedback，这通常启动错误蜂鸣。
void	cut()           对当前外观调用 provideErrorFeedback，这通常启动错误蜂鸣。
boolean	echoCharIsSet()           如果此 JPasswordField 具有为回显设置的字符，则返回 true。
AccessibleContext	getAccessibleContext()           返回与此 JPasswordField 关联的 AccessibleContext。
char	getEchoChar()           返回要用于回显的字符。
char[]	getPassword()           返回此 TextComponent 中所包含的文本。
String	getText()           已过时。 从 Java 2 platform v1.2 开始，由 getPassword 来代替。
String	getText(int offs, int len)           已过时。 从 Java 2 platform v1.2 开始，由 getPassword 来代替。
String	getUIClassID()           返回呈现此组件的 L&F 类名。
protected  String	paramString()           返回此 JPasswordField 的字符串表示形式。
void	setEchoChar(char c)           设置此 JPasswordField 的回显字符。

 

从类 javax.swing.JTextField 继承的方法

addActionListener, configurePropertiesFromAction, createActionPropertyChangeListener, createDefaultModel, fireActionPerformed, getAction, getActionListeners, getActions, getColumns, getColumnWidth, getHorizontalAlignment, getHorizontalVisibility, getPreferredSize, getScrollOffset, isValidateRoot, postActionEvent, removeActionListener, scrollRectToVisible, setAction, setActionCommand, setColumns, setDocument, setFont, setHorizontalAlignment, setScrollOffset

 

从类 javax.swing.text.JTextComponent 继承的方法

addCaretListener, addInputMethodListener, addKeymap, fireCaretUpdate, getCaret, getCaretColor, getCaretListeners, getCaretPosition, getDisabledTextColor, getDocument, getDragEnabled, getFocusAccelerator, getHighlighter, getInputMethodRequests, getKeymap, getKeymap, getMargin, getNavigationFilter, getPreferredScrollableViewportSize, getScrollableBlockIncrement, getScrollableTracksViewportHeight, getScrollableTracksViewportWidth, getScrollableUnitIncrement, getSelectedText, getSelectedTextColor, getSelectionColor, getSelectionEnd, getSelectionStart, getToolTipText, getUI, isEditable, loadKeymap, modelToView, moveCaretPosition, paste, processInputMethodEvent, read, removeCaretListener, removeKeymap, removeNotify, replaceSelection, select, selectAll, setCaret, setCaretColor, setCaretPosition, setComponentOrientation, setDisabledTextColor, setDragEnabled, setEditable, setFocusAccelerator, setHighlighter, setKeymap, setMargin, setNavigationFilter, setSelectedTextColor, setSelectionColor, setSelectionEnd, setSelectionStart, setText, setUI, updateUI, viewToModel, write

 

从类 javax.swing.JComponent 继承的方法

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, 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, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, 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, update

 

从类 java.awt.Container 继承的方法

add, 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, transferFocusBackward, transferFocusDownCycle, validate, validateTree

 

从类 java.awt.Component 继承的方法

action, 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, hide, 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, transferFocusUpCycle

 

从类 java.lang.Object 继承的方法
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

构造方法详细信息

JPasswordField

public JPasswordField()

构造一个新 JPasswordField，使其具有默认文档、为 null 的开始文本字符串和为 0 的列宽度。

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JPasswordField

public JPasswordField(String text)

构造一个利用指定文本初始化的新 JPasswordField。将文档模型设置为默认值，列数为 0。

参数：

text - 要显示的文本；如果没有文本，则为 null

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JPasswordField

public JPasswordField(int columns)

构造一个具有指定列数的新的空 JPasswordField。创建一个默认模型，并将其初始字符串设置为 null。

参数：

columns - 列数，它 >= 0

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JPasswordField

public JPasswordField(String text,
                      int columns)

构造一个利用指定文本和列初始化的新 JPasswordField。将文档模型设置为默认值。

参数：

text - 要显示的文本；如果不存在文本，则为 null

columns - 列数，它 >= 0

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JPasswordField

public JPasswordField(Document doc,
                      String txt,
                      int columns)

构造一个使用给定文本存储模型和给定列数的新 JPasswordField。其他构造方法馈通此构造方法。将回显字符设置为 '*'。如果文档模型为 null，则创建默认文档。

参数：

doc - 要使用的文本存储

txt - 要显示的文本；如果不存在文本，则为 null

columns - 用于计算首选宽度的列数，它 >= 0；如果将列数设置为零，则首选宽度将从组件实现自然产生

方法详细信息

getUIClassID

public String getUIClassID()

返回呈现此组件的 L&F 类名。

覆盖：

类 JTextField 中的 getUIClassID

返回：

字符串 "PasswordFieldUI"

另请参见：

JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

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getEchoChar

public char getEchoChar()

返回要用于回显的字符。默认值为 '*'。

返回：

回显字符；如果未设置，则返回 0

另请参见：

setEchoChar(char), echoCharIsSet()

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setEchoChar

public void setEchoChar(char c)

设置此 JPasswordField 的回显字符。注意，这仅仅是一个建议，因为安装的视图可以使用它所需要的任何图形技术来表示字段。将值设置为 0 指示希望按照键入查看文本，类似于标准 JTextField 的行为。

参数：

c - 要显示的回显字符

另请参见：

echoCharIsSet(), getEchoChar()