事件模式的实现步骤：开发事件对象（事件发送者）——接口——接口实现类——设置监听对象一定要理解透彻Gril.java程序。 重点：学会处理对一个事件源有多个事件的监听器（在发送消息时监听器收到消息的排名不分先后）。事件监听的响应顺序是不分先后的，不是谁先注册谁就先响应。事件监听由两个部分组成（接口和接口的实现...

在java.util中有EventListener接口：所有事件监听者都要实现这个接口。java.util中有EventObject类：所有的事件都为其子类。 事件范例在CoreJavaGirl.java文件中。(文件已加注释)       ...

五种布局管理器：P206：FlowLayout(流式布局)：按照组件添加到容器中的顺序，顺序排放组件位置。默认为水平排列，如果越界那么会向下排列。排列的位置随着容器大小的改变而改变。Panel默认的布局管理器为FlowLayout。 BorderLayout：会将容器非常五个区域：东西南北中。语句：Butto...

JDBC驱动程序在JDBCAPI中实现定义的接口，用于与数据库服务器进行交互。例如，使用JDBC驱动程序，可以通过发送SQL或数据库命令，然后使用Java接收结果来打开数据库连接并与数据库进行交互。JDK附带的Java.sql包包含各种类，其类的行为被定义，实现在第三方驱动程序中完成。第三方供应商在其数据库驱动程序中实...

BysharinganInputMaporActionMap,anychangetothesharedInputMaporActionMapwillaffectallcomponentssharingtheInputMaporActionMap.WHEN_FOCUSEDandWHEN_ANCESTOR_OF_FOCUS...

Thisexampledemonstrateshowtolistalltheactionsinacomponent.ActionMapmap=component.getActionMap();//Listactionsinthecomponentlist(map,map.keys());//Listactionsint...

Thisexamplecreatesanumberofkeystrokesandaddsthemtotheinputmapofacomponent.Whenakeystrokeisaddedtoaninputmap,anactionnamemustbesupplied.Thisactionisinvokedwhenth...

TheKeyStroke.toString()methoddoesnotreturnastringthatcanbeparsedbyKeyStroke.getKeyStroke().ThemethodkeyStroke2String()inthisexamplereturnsastringthatisparseable...

component.addMouseListener(newMyMouseListener());publicclassMyMouseListenerextendsMouseAdapter{publicvoidmouseClicked(MouseEventevt){if(evt.getClickCount()==3){...

component.addMouseMotionListener(newMyMouseMotionListener());publicclassMyMouseMotionListenerextendsMouseMotionAdapter{publicvoidmouseMoved(MouseEventevt){//Pro...

component.addMouseListener(newMyMouseListener());publicclassMyMouseListenerextendsMouseAdapter{publicvoidmouseClicked(MouseEventevt){if((evt.getModifiers()&...

Youcangetthekeythatwaspressedeitherasakeycharacter(whichisaUnicodecharacter)orasakeycode(aspecialvaluerepresentingaparticularkeyonthekeyboard).component.addKeyL...

AnobjectwishingtofireitemeventsmustimplementItemSelectable.Thisexampleshowstypicalcodethatanobjectmustimplementtofireitemevents.Whenanitemeventistobefired,fireI...

Ifaneventhandlerisspecifictoacomponent(thatis,notsharedbyothercomponents),thereisnoneedtodeclareaclasstohandletheevent.Theeventhandlercanbeimplementedusinganano...

component.addFocusListener(newMyFocusListener());publicclassMyFocusListenerextendsFocusAdapter{publicvoidfocusGained(FocusEventevt){//Thecomponentgainedthefocus...