计算器.docx
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计算器
importjava.awt.BorderLayout;
importjavax.swing.JPanel;
importjavax.swing.JFrame;
importjavax.swing.JTextField;
importjava.awt.GridBagLayout;
importjavax.swing.JButton;
importjava.awt.GridBagConstraints;
importjava.awt.GridLayout;
importjava.awt.ComponentOrientation;
publicclasscalculatorextendsJFrame{
privatestaticfinallongserialVersionUID=1L;
privateJPaneljContentPane=null;
privateJTextFieldjTextField=null;
privateJPaneljPanel=null;
privateJButtonjButton=null;
privateJButtonjButton1=null;
privateJButtonjButton2=null;
privateJButtonjButton3=null;
privateJButtonjButton4=null;
privateJButtonjButton5=null;
privateJButtonjButton6=null;
privateJButtonjButton7=null;
privateJButtonjButton8=null;
privateJButtonjButton9=null;
privateJButtonjButton10=null;
privateJButtonjButton11=null;
privateJButtonjButton12=null;
privateJButtonjButton13=null;
privateJButtonjButton14=null;
privateJButtonjButton15=null;
privatedoubleresult=0;
privateStringlastCommand="=";//@jve:
decl-index=0:
privatebooleanstart=true;
privateJPaneljPanel1=null;
privateJButtonjButton16=null;
/**
*Thisisthedefaultconstructor
*/
publicqwert（）{
super（）;
initialize（）;
}
/**
*Thismethodinitializesthis
*
*@returnvoid
*/
privatevoidinitialize（）{
this.setSize（300,200）;
this.setContentPane（getJContentPane（））;
this.setTitle（"计算器"）;
}
/**
*ThismethodinitializesjContentPane
*
*@returnjavax.swing.JPanel
*/
privateJPanelgetJContentPane（）{
if（jContentPane==null）{
jContentPane=newJPanel（）;
jContentPane.setLayout（newBorderLayout（））;
jContentPane.add（getJPanel1（）,BorderLayout.EAST）;
jContentPane.add（getJTextField（）,BorderLayout.NORTH）;
jContentPane.add（getJPanel（）,BorderLayout.CENTER）;
}
returnjContentPane;
}
/**
*ThismethodinitializesjTextField
*
*@returnjavax.swing.JTextField
*/
privateJTextFieldgetJTextField（）{
if（jTextField==null）{
jTextField=newJTextField（）;
}
returnjTextField;
}
/**
*ThismethodinitializesjPanel
*
*@returnjavax.swing.JPanel
*/
privateJPanelgetJPanel（）{
if（jPanel==null）{
GridLayoutgridLayout=newGridLayout（4,4）;
jPanel=newJPanel（）;
jPanel.setComponentOrientation（ComponentOrientation.LEFT_TO_RIGHT）;
jPanel.setLayout（gridLayout）;
jPanel.add（getJButton（）,null）;
jPanel.add（getJButton8（）,null）;
jPanel.add（getJButton12（）,null）;
jPanel.add（getJButton15（）,null）;
jPanel.add（getJButton14（）,null）;
jPanel.add（getJButton13（）,null）;
jPanel.add（getJButton11（）,null）;
jPanel.add（getJButton10（）,null）;
jPanel.add（getJButton7（）,null）;
jPanel.add（getJButton6（）,null）;
jPanel.add（getJButton1（）,null）;
jPanel.add（getJButton2（）,null）;
jPanel.add（getJButton3（）,null）;
jPanel.add（getJButton4（）,null）;
jPanel.add（getJButton5（）,null）;
jPanel.add（getJButton9（）,null）;
}
returnjPanel;
}
/**
*ThismethodinitializesjButton
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton（）{
if（jButton==null）{
jButton=newJButton（）;
jButton.setText（"1"）;
jButton.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
if（start）{
jTextField.setText（""）;
start=false;
}
jTextField.setText（jTextField.getText（）+input）;
}
}）;
}
returnjButton;
}
/**
*ThismethodinitializesjButton1
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton1（）{
if（jButton1==null）{
jButton1=newJButton（）;
jButton1.setText（"9"）;
jButton1.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
if（start）{
jTextField.setText（""）;
start=false;}
jTextField.setText（jTextField.getText（）+input）;
}
}）;
}
returnjButton1;
}
/**
*ThismethodinitializesjButton2
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton2（）{
if（jButton2==null）{
jButton2=newJButton（）;
jButton2.setText（"*"）;
jButton2.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
calculate（Double.parseDouble（jTextField.getText（）））;
lastCommand=input;
start=true;
}
}）;
}
returnjButton2;
}
/**
*ThismethodinitializesjButton3
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton3（）{
if（jButton3==null）{
jButton3=newJButton（）;
jButton3.setText（"0"）;
jButton3.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
if（start）{
jTextField.setText（""）;
start=false;}
jTextField.setText（jTextField.getText（）+input）;
}
}）;
}
returnjButton3;
}
/**
*ThismethodinitializesjButton4
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton4（）{
if（jButton4==null）{
jButton4=newJButton（）;
jButton4.setText（"."）;
jButton4.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
if（start）{
jTextField.setText（""）;
start=false;
}
jTextField.setText（jTextField.getText（）+input）;
}
}）;
}
returnjButton4;
}
/**
*ThismethodinitializesjButton5
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton5（）{
if（jButton5==null）{
jButton5=newJButton（）;
jButton5.setText（"="）;
jButton5.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
calculate（Double.parseDouble（jTextField.getText（）））;
lastCommand=input;
start=true;
}
}）;
}
returnjButton5;
}
/**
*ThismethodinitializesjButton6
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton6（）{
if（jButton6==null）{
jButton6=newJButton（）;
jButton6.setText（"8"）;
jButton6.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
if（start）{
jTextField.setText（""）;
start=false;
}
jTextField.setText（jTextField.getText（）+input）;
}
}）;
}
returnjButton6;
}
/**
*ThismethodinitializesjButton7
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton7（）{
if（jButton7==null）{
jButton7=newJButton（）;
jButton7.setText（"7"）;
jButton7.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
if（start）{
jTextField.setText（""）;
start=false;
}
jTextField.setText（jTextField.getText（）+input）;
}
}）;
}
returnjButton7;
}
/**
*ThismethodinitializesjButton8
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton8（）{
if（jButton8==null）{
jButton8=newJButton（）;
jButton8.setText（"2"）;
jButton8.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
if（start）{
jTextField.setText（""）;
start=false;}
jTextField.setText（jTextField.getText（）+input）;
}
}）;
}
returnjButton8;
}
/**
*ThismethodinitializesjButton9
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton9（）{
if（jButton9==null）{
jButton9=newJButton（）;
jButton9.setText（"/"）;
jButton9.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
calculate（Double.parseDouble（jTextField.getText（）））;
lastCommand=input;
start=true;
}
}）;
}
returnjButton9;
}
/**
*ThismethodinitializesjButton10
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton10（）{
if（jButton10==null）{
jButton10=newJButton（）;
jButton10.setText（"-"）;
jButton10.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
calculate（Double.parseDouble（jTextField.getText（）））;
lastCommand=input;
start=true;
}
}）;
}
returnjButton10;
}
/**
*ThismethodinitializesjButton11
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton11（）{
if（jButton11==null）{
jButton11=newJButton（）;
jButton11.setText（"6"）;
jButton11.addActionListener（newjava.awt.event.ActionListener（）{
publicvoidactionPerformed（java.awt.event.ActionEvente）{
Stringinput=e.getActionCommand（）;
if（start）{
jTextField.setText（""）;
start=false;}
jTextField.setText（jTextField.getText（）+input）;
}
}）;
}
returnjButton11;
}
/**
*ThismethodinitializesjButton12
*
*@returnjavax.swing.JButton
*/
privateJButtongetJButton12（）{
if（jButton12==null）{
jButton12=newJButton（）;
jButton12.setText（"3"）;
jButton12.addActionListener（newjava.awt.event.ActionListener（）{
p
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