java.lang.Class.getMethods()方法實例

java.lang.Class.getMethods() 返回一個包含對象的方法反映類或接口的所有公共成員方法，此Class對象所表示，包括那些由類或接口以及那些從父類繼承聲明數組。

該方法返回一個長度爲0的數組，如果此Class對象表示的類或接口，沒有公共成員方法，或如果此Class對象表示一個基本類型或void。

聲明

以下是**java.lang.Class.getMethods()**方法的聲明

public Method[] getMethods() throws SecurityException

參數

• NA

返回值

此方法返回一個表示這個類的公共方法Method對象的數組。

異常

• SecurityException -- 如果安全管理存在。

例子

下面的例子顯示java.lang.Class.getMethods()方法的使用。

package com.yiibai; import java.lang.reflect.*; public class ClassDemo { public static void main(String[] args) { try { Class cls = Class.forName("java.awt.Label"); System.out.println("Methods ="); /* returns the array of Method objects representing the public
methods of this class */ Method m[] = cls.getMethods(); for(int i = 0; i < m.length; i++) { System.out.println(m[i]); } } catch (Exception e) { System.out.println("Exception: " + e); } } }

讓我們來編譯和運行上面的程序，這將產生以下結果：

Methods = public void java.awt.Label.addNotify() public int java.awt.Label.getAlignment() public synchronized void java.awt.Label.setAlignment(int) public java.lang.String java.awt.Label.getText() public void java.awt.Label.setText(java.lang.String) public javax.accessibility.AccessibleContext java.awt.Label.getAccessibleContext() public void java.awt.Component.add(java.awt.PopupMenu) public java.lang.String java.awt.Component.toString() public java.lang.String java.awt.Component.getName() public java.awt.Dimension java.awt.Component.size() public boolean java.awt.Component.contains(int,int) public boolean java.awt.Component.contains(java.awt.Point) public java.awt.Container java.awt.Component.getParent() public java.awt.Point java.awt.Component.getLocation() public java.awt.Point java.awt.Component.getLocation(java.awt.Point) public void java.awt.Component.remove(java.awt.MenuComponent) public void java.awt.Component.setName(java.lang.String) public void java.awt.Component.list() public void java.awt.Component.list(java.io.PrintStream) public void java.awt.Component.list(java.io.PrintStream,int) public void java.awt.Component.list(java.io.PrintWriter) public void java.awt.Component.list(java.io.PrintWriter,int) public void java.awt.Component.print(java.awt.Graphics) public java.awt.Dimension java.awt.Component.getSize() public java.awt.Dimension java.awt.Component.getSize(java.awt.Dimension) public void java.awt.Component.resize(int,int) public void java.awt.Component.resize(java.awt.Dimension) public boolean java.awt.Component.action(java.awt.Event,java.lang.Object) public void java.awt.Component.setSize(int,int) public void java.awt.Component.setSize(java.awt.Dimension) public void java.awt.Component.update(java.awt.Graphics) public boolean java.awt.Component.isOpaque() public void java.awt.Component.enable() public void java.awt.Component.enable(boolean) public void java.awt.Component.disable() public java.awt.Point java.awt.Component.location() public final java.lang.Object java.awt.Component.getTreeLock() public java.awt.Toolkit java.awt.Component.getToolkit() public java.awt.peer.ComponentPeer java.awt.Component.getPeer() public synchronized void java.awt.Component.setDropTarget(java.awt.dnd.DropTarget) public synchronized java.awt.dnd.DropTarget java.awt.Component.getDropTarget() public java.awt.GraphicsConfiguration java.awt.Component.getGraphicsConfiguration() public boolean java.awt.Component.isValid() public boolean java.awt.Component.isDisplayable() public boolean java.awt.Component.isVisible() public java.awt.Point java.awt.Component.getMousePosition() throws java.awt.HeadlessException public boolean java.awt.Component.isShowing() public boolean java.awt.Component.isEnabled() public void java.awt.Component.setEnabled(boolean) public boolean java.awt.Component.isDoubleBuffered() public void java.awt.Component.enableInputMethods(boolean) public void java.awt.Component.setVisible(boolean) public void java.awt.Component.show() public void java.awt.Component.show(boolean) public void java.awt.Component.hide() public java.awt.Color java.awt.Component.getForeground() public void java.awt.Component.setForeground(java.awt.Color) public boolean java.awt.Component.isForegroundSet() public java.awt.Color java.awt.Component.getBackground() public void java.awt.Component.setBackground(java.awt.Color) public boolean java.awt.Component.isBackgroundSet() public java.awt.Font java.awt.Component.getFont() public void java.awt.Component.setFont(java.awt.Font) public boolean java.awt.Component.isFontSet() public java.util.Locale java.awt.Component.getLocale() public void java.awt.Component.setLocale(java.util.Locale) public java.awt.image.ColorModel java.awt.Component.getColorModel() public java.awt.Point java.awt.Component.getLocationOnScreen() public void java.awt.Component.setLocation(int,int) public void java.awt.Component.setLocation(java.awt.Point) public void java.awt.Component.move(int,int) public java.awt.Rectangle java.awt.Component.getBounds() public java.awt.Rectangle java.awt.Component.getBounds(java.awt.Rectangle) public java.awt.Rectangle java.awt.Component.bounds() public void java.awt.Component.setBounds(int,int,int,int) public void java.awt.Component.setBounds(java.awt.Rectangle) public void java.awt.Component.reshape(int,int,int,int) public int java.awt.Component.getX() public int java.awt.Component.getY() public int java.awt.Component.getWidth() public int java.awt.Component.getHeight() public boolean java.awt.Component.isLightweight() public void java.awt.Component.setPreferredSize(java.awt.Dimension) public java.awt.Dimension java.awt.Component.preferredSize() public boolean java.awt.Component.isPreferredSizeSet() public java.awt.Dimension java.awt.Component.getPreferredSize() public void java.awt.Component.setMinimumSize(java.awt.Dimension) public java.awt.Dimension java.awt.Component.minimumSize() public boolean java.awt.Component.isMinimumSizeSet() public java.awt.Dimension java.awt.Component.getMinimumSize() public void java.awt.Component.setMaximumSize(java.awt.Dimension) public boolean java.awt.Component.isMaximumSizeSet() public java.awt.Dimension java.awt.Component.getMaximumSize() public float java.awt.Component.getAlignmentX() public float java.awt.Component.getAlignmentY() public int java.awt.Component.getBaseline(int,int) public java.awt.Component$BaselineResizeBehavior java.awt.Component.getBaselineResizeBehavior() public void java.awt.Component.doLayout() public void java.awt.Component.layout() public void java.awt.Component.validate() public void java.awt.Component.invalidate() public java.awt.Graphics java.awt.Component.getGraphics() public java.awt.FontMetrics java.awt.Component.getFontMetrics(java.awt.Font) public void java.awt.Component.setCursor(java.awt.Cursor) public java.awt.Cursor java.awt.Component.getCursor() public boolean java.awt.Component.isCursorSet() public void java.awt.Component.paint(java.awt.Graphics) public void java.awt.Component.paintAll(java.awt.Graphics) public void java.awt.Component.repaint() public void java.awt.Component.repaint(long) public void java.awt.Component.repaint(int,int,int,int) public void java.awt.Component.repaint(long,int,int,int,int) public void java.awt.Component.printAll(java.awt.Graphics) public boolean java.awt.Component.imageUpdate(java.awt.Image,int,int,int,int,int) public java.awt.Image java.awt.Component.createImage(java.awt.image.ImageProducer) public java.awt.Image java.awt.Component.createImage(int,int) public java.awt.image.VolatileImage java.awt.Component.createVolatileImage(int,int) public java.awt.image.VolatileImage java.awt.Component.createVolatileImage(int,int,java.awt.ImageCapabilities) throws java.awt.AWTException public boolean java.awt.Component.prepareImage(java.awt.Image,java.awt.image.ImageObserver) public boolean java.awt.Component.prepareImage (java.awt.Image,int,int,java.awt.image.ImageObserver) public int java.awt.Component.checkImage(java.awt.Image,java.awt.image.ImageObserver) public int java.awt.Component.checkImage (java.awt.Image,int,int,java.awt.image.ImageObserver) public void java.awt.Component.setIgnoreRepaint(boolean) public boolean java.awt.Component.getIgnoreRepaint() public boolean java.awt.Component.inside(int,int) public java.awt.Component java.awt.Component.getComponentAt(int,int) public java.awt.Component java.awt.Component.getComponentAt(java.awt.Point) public java.awt.Component java.awt.Component.locate(int,int) public void java.awt.Component.deliverEvent(java.awt.Event) public final void java.awt.Component.dispatchEvent(java.awt.AWTEvent) public boolean java.awt.Component.postEvent(java.awt.Event) public synchronized void java.awt.Component.addComponentListener(java.awt.event.ComponentListener) public synchronized void java.awt.Component.removeComponentListener(java.awt.event.ComponentListener) public synchronized java.awt.event.ComponentListener[] java.awt.Component.getComponentListeners() public synchronized void java.awt.Component.addFocusListener(java.awt.event.FocusListener) public synchronized void java.awt.Component.removeFocusListener(java.awt.event.FocusListener) public synchronized java.awt.event.FocusListener[] java.awt.Component.getFocusListeners() public void java.awt.Component.addHierarchyListener(java.awt.event.HierarchyListener) public void java.awt.Component.removeHierarchyListener(java.awt.event.HierarchyListener) public synchronized java.awt.event.HierarchyListener[] java.awt.Component.getHierarchyListeners() public void java.awt.Component.addHierarchyBoundsListener (java.awt.event.HierarchyBoundsListener) public void java.awt.Component.removeHierarchyBoundsListener (java.awt.event.HierarchyBoundsListener) public synchronized java.awt.event.HierarchyBoundsListener[] java.awt.Component.getHierarchyBoundsListeners() public synchronized void java.awt.Component.addKeyListener(java.awt.event.KeyListener) public synchronized void java.awt.Component.removeKeyListener(java.awt.event.KeyListener) public synchronized java.awt.event.KeyListener[] java.awt.Component.getKeyListeners() public synchronized void java.awt.Component.addMouseListener(java.awt.event.MouseListener) public synchronized void java.awt.Component.removeMouseListener(java.awt.event.MouseListener) public synchronized java.awt.event.MouseListener[] java.awt.Component.getMouseListeners() public synchronized void java.awt.Component.addMouseMotionListener(java.awt.event.MouseMotionListener) public synchronized void java.awt.Component.removeMouseMotionListener (java.awt.event.MouseMotionListener) public synchronized java.awt.event.MouseMotionListener[] java.awt.Component.getMouseMotionListeners() public synchronized void java.awt.Component.addMouseWheelListener(java.awt.event.MouseWheelListener) public synchronized void java.awt.Component.removeMouseWheelListener(java.awt.event.MouseWheelListener) public synchronized java.awt.event.MouseWheelListener[] java.awt.Component.getMouseWheelListeners() public synchronized void java.awt.Component.addInputMethodListener(java.awt.event.InputMethodListener) public synchronized void java.awt.Component.removeInputMethodListener (java.awt.event.InputMethodListener) public synchronized java.awt.event.InputMethodListener[] java.awt.Component.getInputMethodListeners() public java.util.EventListener[] java.awt.Component.getListeners(java.lang.Class) public java.awt.im.InputMethodRequests java.awt.Component.getInputMethodRequests() public java.awt.im.InputContext java.awt.Component.getInputContext() public boolean java.awt.Component.handleEvent(java.awt.Event) public boolean java.awt.Component.mouseDown(java.awt.Event,int,int) public boolean java.awt.Component.mouseDrag(java.awt.Event,int,int) public boolean java.awt.Component.mouseUp(java.awt.Event,int,int) public boolean java.awt.Component.mouseMove(java.awt.Event,int,int) public boolean java.awt.Component.mouseEnter(java.awt.Event,int,int) public boolean java.awt.Component.mouseExit(java.awt.Event,int,int) public boolean java.awt.Component.keyDown(java.awt.Event,int) public boolean java.awt.Component.keyUp(java.awt.Event,int) public void java.awt.Component.removeNotify() public boolean java.awt.Component.gotFocus(java.awt.Event,java.lang.Object) public boolean java.awt.Component.lostFocus(java.awt.Event,java.lang.Object) public boolean java.awt.Component.isFocusTraversable() public boolean java.awt.Component.isFocusable() public void java.awt.Component.setFocusable(boolean) public void java.awt.Component.setFocusTraversalKeys(int,java.util.Set) public java.util.Set java.awt.Component.getFocusTraversalKeys(int) public boolean java.awt.Component.areFocusTraversalKeysSet(int) public void java.awt.Component.setFocusTraversalKeysEnabled(boolean) public boolean java.awt.Component.getFocusTraversalKeysEnabled() public void java.awt.Component.requestFocus() public boolean java.awt.Component.requestFocusInWindow() public java.awt.Container java.awt.Component.getFocusCycleRootAncestor() public boolean java.awt.Component.isFocusCycleRoot(java.awt.Container) public void java.awt.Component.transferFocus() public void java.awt.Component.nextFocus() public void java.awt.Component.transferFocusBackward() public void java.awt.Component.transferFocusUpCycle() public boolean java.awt.Component.hasFocus() public boolean java.awt.Component.isFocusOwner() public void java.awt.Component.addPropertyChangeListener(java.beans.PropertyChangeListener) public void java.awt.Component.addPropertyChangeListener (java.lang.String,java.beans.PropertyChangeListener) public void java.awt.Component.removePropertyChangeListener (java.beans.PropertyChangeListener) public void java.awt.Component.removePropertyChangeListener (java.lang.String,java.beans.PropertyChangeListener) public java.beans.PropertyChangeListener[] java.awt.Component.getPropertyChangeListeners() public java.beans.PropertyChangeListener[] java.awt.Component.getPropertyChangeListeners(java.lang.String) public void java.awt.Component.firePropertyChange(java.lang.String,byte,byte) public void java.awt.Component.firePropertyChange(java.lang.String,char,char) public void java.awt.Component.firePropertyChange(java.lang.String,short,short) public void java.awt.Component.firePropertyChange(java.lang.String,long,long) public void java.awt.Component.firePropertyChange(java.lang.String,float,float) public void java.awt.Component.firePropertyChange(java.lang.String,double,double) public void java.awt.Component.setComponentOrientation(java.awt.ComponentOrientation) public java.awt.ComponentOrientation java.awt.Component.getComponentOrientation() public void java.awt.Component.applyComponentOrientation(java.awt.ComponentOrientation) public final native void java.lang.Object.wait(long) throws java.lang.InterruptedException public final void java.lang.Object.wait(long,int) throws java.lang.InterruptedException public final void java.lang.Object.wait() throws java.lang.InterruptedException public boolean java.lang.Object.equals(java.lang.Object) public native int java.lang.Object.hashCode() public final native java.lang.Class java.lang.Object.getClass() public final native void java.lang.Object.notify() public final native void java.lang.Object.notifyAll()