java核心中軟國際預(yù)習(xí)材料

javax.swing包中包含經(jīng)過改進后的GUI組件，而java.awt在手工編碼中，一般使用布局管理器來定位組件，常用的我們通常利用JPanel來實現(xiàn)嵌套布局，從而達到設(shè)計復(fù)雜 對于采用了圖形用戶界面的程序來說，控制是非常重必須進行處理；用戶與GUI組件進行交互就會發(fā)生，如：按下一個按當(dāng)前我們要關(guān)注的并不是“是如何產(chǎn)生的”，而是討論當(dāng)發(fā)生后，我們應(yīng)當(dāng)“如何處理之”。 源的動作，當(dāng) java.awt.event ActionListener publicvoidactionPerformed(ActionEventae); importjava.awt.*;importjavax.swing.*;publicclassEventDemoextendsJFrame{privateJLabellb g=newJLabel(" btnClick=newJButton(" ContainercpMe=getContentPane();cpMe.setLayout(newBorderLayout()); g,BorderLayout.CENTER);cpMe.add(btnClick,BorderLayout.SOUTH);setTitle("ActionListenerDemo");setSize(300,200);}publicstaticvoidmain(String[]args){newEventDemo();}} 源 classMyListenerimplementsActionListener{publicvoidactionPerformed(ActionEventae)}}事實上，我們重寫的這個抽象方法就是處理函數(shù)。也就是說，當(dāng)發(fā)生時，這個方法將自動調(diào)用，其中的代但是，為了方便成員間的相互，我們一般采用內(nèi)部類的方式來實現(xiàn)器。 importjava.awt.event.*;//要進行importjavax.swing.*;

publicclassEventDemoextendsJFrame{privateJLabellb publicEventDemo(){//} publicvoidactionPerformed(ActionEventae){ }}publicstaticvoidmain(String[]args){newEventDemo();}}publicclassExteriorClassprivateclassInteriorClass}}成員，權(quán)限遵循類成員的權(quán)限機制，可以是public、內(nèi)部類可以很方便地外部類中的其它成員；內(nèi)部類主要為了解決類成員間相互的問題，類似于C++中友 classclassOuter{//publicclassInner{//}}Outeranew }} voidaddXxxListener(XxxListenerlistener); publicpublicvoidactionPerformed(ActionEventae){//實現(xiàn) }}importjava.awt.*;importjavax.swing.*;publicclassEventDemoextendsJFrame{privateJLabellb publicEventDemo(){// } publicstaticvoidmain(String[]args){newEventDemo();}} 類 源JButton,JList, {} {} } publicinterface{publicvoidmouseMoved(MouseEventpublicvoidmouseDragged(MouseEventme);} {} publicinterfaceWindowListener/*窗口被激活時調(diào)用publicvoidwindowActivated(WindowEvent/*窗口 時調(diào)用publicvoidwindowDeactivated(WindowEvent/*窗口被關(guān)閉時調(diào)用publicvoidwindowClosed(WindowEvent/*窗口正在關(guān)閉時調(diào)用publicvoidwindowClosing(WindowEvent/*窗口最小化時調(diào)用publicvoidwindowIconified(WindowEvent/*窗口恢復(fù)時調(diào)用publicvoidwindowDeiconified(WindowEvent/*窗口打開時調(diào)用publicvoidwindowOpened(WindowEvent} {}importjava.awt.*;importjavax.swing.*;publicclassMouseMotionDemoextendsJFrameprivateJLabellblN;//放置在北邊的privateJLabellblS;//lblSnewJLabel("請拖動鼠標(biāo)");ContainercpMe=cpMe.setLayout(newBorderLayout());cpMe.add(lblN,BorderLayout.NORTH);cpMe.add(lblS,BorderLayout.SOUTH);this.setSize(600,400);}publicstaticvoidmain(String[]args){newMouseMotionDemo();}} publicvoidmouseMoved(MouseEventme){}}}publicclassMouseMotionDemoextendsJFrame{privateJLabellblN; }publicstaticvoidmain(String[]args){newMouseMotionDemo();}} 對象中包含有發(fā)生時的相關(guān)信息（即觸發(fā)時產(chǎn)生的一些數(shù)據(jù)），會被底層機制傳遞到處理函實際上對象就是處理函數(shù)中被傳遞進來的參數(shù)，如果在處理的過程中需要使用到相關(guān)的某些數(shù)據(jù)，可以從對象中獲取。 intintintint publicvoidmouseMoved(MouseEventme){intx=me.getX();//得到鼠標(biāo)位置的x坐 inty=me.getY();//得到鼠標(biāo)位置的y坐 Stringstr="正在移動鼠標(biāo)X:"+x+",Y:"+y;}publicvoidmouseDragged(MouseEventme){intx=me.getX();//得到鼠標(biāo)位置的x坐 inty Stringstr="正在拖動鼠標(biāo)X:"+x+",Y:"+y;}} publicclassMouseMotionDemoextendsJFrame{privateJLabellblN; } }publicstaticvoidmain(String[]args){newMouseMotionDemo();}} publicMouseMotionDemo// }publicvoidmouseMoved(MouseEventme){}publicvoidmouseDragged(MouseEventme){} publi