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1、組合框運(yùn)用實(shí)例importjava.awt?*；importjava.awt.event.*；importjavax.swing.*；publicclassintBinaryJFrameextendsJFrameimplementsActionListener//操作數(shù)利運(yùn)算結(jié)果//算術(shù)運(yùn)算符privateJTextFieldtexts[]；privateJComboBoxcombox；publicIntBinaryJFrame(){super(“十進(jìn)制算術(shù)運(yùn)算的豎式及二進(jìn)制顯示”)；this.setSize(280,220);this.set
2、Resizable(true)；Dimensiondim=getToolkit().getScreenSize()；//獲彳導(dǎo)屏幕分辨率this.setLocation((dim.width-this.getWidth())/2z(dim.height-this.getHeight())/2)；//窗口居中this?setBackground(Color.lightGray)；this.setDefaultCloseOperation(EXIT_ON_CLOSE)；//結(jié)束上進(jìn)無(wú)呈intnumber=3；//設(shè)置彳了數(shù)為3彳J：this?get
3、:Content:Pane().setLayout(newGridLayout(number,1))；texts=newJTextField[number*2]；Objectoperators[]={n+n,for(inti=0；icnumber；i++)JPanelpanel=newJPanel(newF1owLayout(FlowLayout.RIGHT))；this?getContentPane().add(panel)；if(i==l)//組合框,默認(rèn)combox=newJComboBox(operators)；不可編輯panel?ad
4、d(combox)；}if(i==number-1){JButtonbutton=newJButton(n=n);panel.add(button)；button?eddActionListener(this)；//注刖單擊事件監(jiān)0T器卑}texts[i]=newJTextField("0"z5)；texts[i]?setHorizontalAlignment(Swingconstants?RIGHT)；//.文本彳亍彳i對(duì)齊panel?add(texts[i])；texts[i+number]=newJTextField(n0n,8)；tex
5、ts[i+number].setHorizontalAlignment(Swingconstants.RIGHT)；texts[i+number].setEditable(false)；panel?add(texts[i+number])；}texts[number-1].setEditable(false)；//只能顯示，不允許編輯this.setVisible(true)；}publicvoidactionPerformed(ActionEvente)//按鈕單擊事件處理方法{try{intx=Integer.parselnt(texts[
6、0].getText(),10)；Stringa=Integer.toBinaryString(x)；inty=Integer.parselnt(texts[1].getText(),10)；Stringb=Integer?toBinA：rySt:ring(y)；texts[3].setText(a)；texts[4]?setText(b);switch(combox.getSelectedlndex()){case0:x+=y；break；case1:x-=y；break；}texts[2].setText(x+"")；texts[5].se
7、tText(Integer?toString(x,2))；}catch(NumberFormatExceptionnfe){JOptionPane.showMessageDialog(this,符串不能轉(zhuǎn)換成整數(shù)，請(qǐng)重新輸入!");}finally{}}publicstaticvoidmain(Stringarg[]){newlntBinaryJFrame()；}}計(jì)算器運(yùn)用實(shí)例importjava>awt?*;importjavax.swing.*;importjava.awt?event?*;publicclassjisuanqiexten
8、dsJFrameimplementsActionListener{privateJTextFieldtext_math;privateJPanelto
