Java課程設計計算器源程序代碼

1、package jisuanqi;public class JiSuanQi extends JFrame implements ActionListener/ JiSuanQi 繼承Frame實現(xiàn)ActionListener接口JMenuBar menubar;/定義一個菜單JMenu menu1,menu2,menu3;/定義菜單組件各個部分的對象JMenuItem menuitem1,menuitem2,menuitem3,menuitem4,menuitem5;/定義對象下的菜單項JLabel label;JButtonb1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b1

2、1,b12,b13,b14,b15,b16,b17,b18,b19,b20,b01,b02,b03,b04,b05;JPanel panel1,panel2,panel3;/定義三個面板String a=0;boolean b,c;Double m=0.0,n=0.0,r=0.0;Integer h=0;int d;public JiSuanQi(setTitle(jisuanqi;panel1=new JPanel(;panel2=new JPanel(;panel3=new JPanel(;menubar=new JMenuBar(;/以下生成菜單組件對象menu1=new JMenu(F

3、ile;menu2=new JMenu(Edit;menu3=new JMenu(Help;menuitem1=new JMenuItem(ON;menuitem2=new JMenuItem(OFF;menuitem3=new JMenuItem(Close;menuitem4=new JMenuItem(Copy;menuitem5=new JMenuItem(Help;label=new JLabel(;b1=new JButton(7;b2=new JButton(8;b3=new JButton(9;b4=new JButton(/;b5=new JButton(sqrt;b6=ne

4、w JButton(4;b7=new JButton(5;b8=new JButton(6;b9=new JButton(*;b10=new JButton(%;b11=new JButton(1;b12=new JButton(2;b13=new JButton(3;b14=new JButton(-;b15=new JButton(1/x;b16=new JButton(0;b17=new JButton(+/-;b18=new JButton(.;b19=new JButton(+;b20=new JButton(=;b01=new JButton(Backspace;b02=new J

5、Button(CE;b03=new JButton(C;b04=new JButton(ON;b05=new JButton(OFF;setSize(350,240;label.setBorder(BorderFactory.createBevelBorder(1;/建立一個立體的邊界label.setOpaque(true;/設置不透明,以便設置背景色label.setBackground(Color.white;/設置背景色白色label.setHorizontalAlignment(SwingConstants.RIGHT;label.setCursor(new Cursor(Curso

6、r.TEXT_CURSOR;add(panel1;GridBagLayout g=new GridBagLayout(;GridBagConstraints c=new GridBagConstraints(;panel1.setSize(350,200;panel1.setLayout(g;c.gridx=0; c.gridy=0;/這個屬性是用來描述組件在布局時應處于那個網(wǎng)格位置,即描述網(wǎng)格開始的位置.gridx=0,gridy=0時放在0行0列.c.gridwidth=350; c.gridheight=20;/這兩個屬性用來描述組件在布局中的所占的網(wǎng)格的個數(shù),gridwidth描述了該

7、組件在橫向上所占網(wǎng)格的個數(shù),gridheight描述了該組件在縱向上所占網(wǎng)格的個數(shù)c.fill=GridBagConstraints.BOTH;c.insets=new Insets(1,1,1,1;/ 設置組件之間彼此的間距。c.weightx=10.0; c.weighty=0.0;g.setConstraints(menubar,c;panel1.add(menubar;menubar.add(menu1;menubar.add(menu2;menubar.add(menu3;menu1.add(menuitem1;menu1.add(menuitem2;menu1.addSeparat

8、or(;menu1.add(menuitem3;menu2.add(menuitem4;menu3.add(menuitem5;c.gridy=20;c.gridheight=50;g.setConstraints(label,c;panel1.add(label;c.gridy=70;c.gridheight=50;c.weighty=3.0;g.setConstraints(panel2,c;panel1.add(panel2;GridBagLayout i=new GridBagLayout(;GridBagConstraints j=new GridBagConstraints(;pa

9、nel2.setLayout(i;j.gridx=0; j.gridy=0;j.gridwidth=68; j.gridheight=40;j.fill=GridBagConstraints.BOTH;j.insets=new Insets(1,1,1,1;j.weightx=3.0; j.weighty=3.0;i.setConstraints(b04,j;panel2.add(b04;j.gridx=70;i.setConstraints(b01,j;panel2.add(b01;j.gridx=140;i.setConstraints(b02,j;panel2.add(b02;j.gri

10、dx=210;i.setConstraints(b03,j;panel2.add(b03;j.gridx=280;i.setConstraints(b05,j;panel2.add(b05;c.gridy=120;c.gridheight=80;c.weighty=10.0;g.setConstraints(panel3,c;panel1.add(panel3;panel3.setLayout(new GridLayout(4,5;/pencel3面板設置為4行5列共20個網(wǎng)格panel3.add(b1; panel3.add(b2; panel3.add(b3; panel3.add(b4;

11、 panel3.add(b5;/添加按鈕panel3.add(b6; panel3.add(b7; panel3.add(b8; panel3.add(b9; panel3.add(b10;panel3.add(b11; panel3.add(b12; panel3.add(b13; panel3.add(b14; panel3.add(b15;panel3.add(b16; panel3.add(b17; panel3.add(b18; panel3.add(b19; panel3.add(b20;menuitem1.addActionListener(this; menuitem2.add

12、ActionListener(this; menuitem3.addActionListener(this;/注冊菜單項的事件監(jiān)聽器b1.addActionListener(this; b2.addActionListener(this; b3.addActionListener(this;b4.addActionListener(this; b5.addActionListener(this; b6.addActionListener(this;b7.addActionListener(this; b8.addActionListener(this; b9.addActionListener

13、(this;b10.addActionListener(this; b11.addActionListener(this; b12.addActionListener(this;b13.addActionListener(this; b14.addActionListener(this; b15.addActionListener(this;b16.addActionListener(this; b17.addActionListener(this; b18.addActionListener(this;b19.addActionListener(this; b20.addActionList

14、ener(this;b01.addActionListener(this; b02.addActionListener(this; b03.addActionListener(this;b04.addActionListener(this; b05.addActionListener(this;/給按鈕注冊事件監(jiān)視器public void actionPerformed(ActionEvent e/處理按鈕事件if(e.getSource(=menuitem1label.setText(a; b=true;else if(e.getSource(=menuitem2label.setText(

15、; b=false;else if(e.getSource(=menuitem3System.exit(0;else if(e.getSource(=b04label.setText(a; b=true;else if(e.getSource(=b05label.setText(; b=false;if(bif(e.getSource(=b1if(label.getText(.equals(0label.setText(7;elseif(!clabel.setText(label.getText(.concat(7;elselabel.setText(7; c=false; n=0.0;if(

16、e.getSource(=b2if(label.getText(.equals(0label.setText(8;elseif(!clabel.setText(label.getText(.concat(8;elselabel.setText(8; c=false; n=0.0;if(e.getSource(=b3if(label.getText(.equals(0label.setText(9;elseif(!clabel.setText(label.getText(.concat(9;elselabel.setText(9; c=false; n=0.0;if(e.getSource(=b

17、6if(label.getText(.equals(0label.setText(4;elseif(!clabel.setText(label.getText(.concat(4;elselabel.setText(4; c=false; n=0.0; if(e.getSource(=b7if(label.getText(.equals(0label.setText(5;elseif(!clabel.setText(label.getText(.concat(5;elselabel.setText(5; c=false; n=0.0; if(e.getSource(=b8if(label.ge

18、tText(.equals(0label.setText(6;elseif(!clabel.setText(label.getText(.concat(6;elselabel.setText(6; c=false; n=0.0; if(e.getSource(=b11if(label.getText(.equals(0label.setText(1;elseif(!clabel.setText(label.getText(.concat(1;elselabel.setText(1; c=false; n=0.0; if(e.getSource(=b12if(label.getText(.equ

19、als(0label.setText(2;elseif(!clabel.setText(label.getText(.concat(2;elselabel.setText(2; c=false; n=0.0; if(e.getSource(=b13if(label.getText(.equals(0label.setText(3;elseif(!clabel.setText(label.getText(.concat(3;elselabel.setText(3; c=false; n=0.0; if(e.getSource(=b16if(label.getText(.equals(0label

20、.setText(0; else if(!clabel.setText(label.getText(.concat(0; elselabel.setText(0; c=false; n=0.0; if(e.getSource(=b18 if(!label.getText(.contains(.label.setText(label.getText(.concat(.; if(e.getSource(=b4 c=true; d=1; m=m.valueOf(label.getText(; if(e.getSource(=b9 c=true; d=2; m=m.valueOf(label.getT

21、ext(; if(e.getSource(=b14 c=true; d=3; m=m.valueOf(label.getText(; if(e.getSource(=b19 c=true; d=4; m=m.valueOf(label.getText(; if(e.getSource(=b15 m=m.valueOf(label.getText(; if(m=0label.setText(0 沒有倒數(shù); elsem=1/m; if(m.toString(.endsWith(.0 h=Value(; label.setText(h.toString(; elselabel.setTex

22、t(m.toString(; if(e.getSource(=b5 m=m.valueOf(label.getText(; if(m0label.setText(負數(shù)不能被開方; else 6 m=Math.sqrt(m; if(m.toString(.endsWith(.0 h=Value(; label.setText(h.toString(; elselabel.setText(m.toString(; if(e.getSource(=b10 c=true; d=5; m=m.valueOf(label.getText(; if(e.getSource(=b17 r=0-m.v

23、alueOf(label.getText(; if(r.toString(.endsWith(.0 h=Value(; label.setText(h.toString(; elselabel.setText(m.toString(; if(e.getSource(=(b20 if(n=0n=n.valueOf(label.getText(; if(d=1 if(n!=0 m=m/n; if(m.toString(.endsWith(.0 h=Value(; label.setText(h.toString(; elselabel.setText(m.toString(; elselabel.setText(0 不能作除數(shù); else if(d=2 m=m*n; if(m.toStri