JAVA计算器原代码.doc

JAVA计算器原代码import java.awt.*; import java.awt.event.*; import javax.swing.*;public class MyCalculator implements ActionListener JFrame f; JMenu mEdit; JMenu mView; JMenu mHelp; JMenuItem mCopy; JMenuItem mPaste; JTextField tResult;JButton bNumber; JButton bOperator; JButton bOther; JButton bM;boolean isDouble=false;/是否为实数 int opFlag=-1; static double t1=0,t2=0,t3=0,result=0; static int opflag1=-1,opflag2=-1,flag=0,resflag=1; int preOp,currentOp=0;/标准位 double op1=0,op2=0;/操作数 double n3; StringBuffer buf=new StringBuffer(20); StringBuffer copyBoard=new StringBuffer(20);/剪贴板 StringBuffer memory = new StringBuffer(20);/M系列 StringBuffer str = new StringBuffer(); public MyCalculator() f = new JFrame(计算器ByMdou); Container contentPane = f.getContentPane(); /*菜单的创建开始*/ JMenuBar mBar = new JMenuBar(); mBar.setOpaque(true);mEdit = new JMenu(编辑(E); mEdit.setMnemonic(KeyEvent.VK_E); mCopy = new JMenuItem(复制(C); mEdit.add(mCopy); mPaste = new JMenuItem(粘贴(P); mEdit.add(mPaste);mView = new JMenu(查看(V); mView.setMnemonic(KeyEvent.VK_V); mView.add(new JMenuItem(标准型); mView.add(new JMenuItem(科学型); mView.addSeparator(); mView.add(new JMenuItem(查看分组);mHelp = new JMenu(帮助(H); mHelp.setMnemonic(KeyEvent.VK_H); mHelp.add(new JMenuItem(帮助主题); mHelp.addSeparator(); mHelp.add(new JMenuItem(关于计算器);mBar.add(mEdit); mBar.add(mView); mBar.add(mHelp); f.setJMenuBar(mBar); contentPane.setLayout(new BorderLayout(); JPanel pTop = new JPanel(); tResult = new JTextField(0.,26); tResult.setHorizontalAlignment(JTextField.RIGHT ); tResult.setEditable(false); pTop.add(tResult); contentPane.add(pTop,BorderLayout.NORTH); JPanel pBottom = new JPanel(); pBottom.setLayout(new BorderLayout(); JPanel pLeft = new JPanel(); pLeft.setLayout(new GridLayout(5,1,3,3); bM = new JButton( );bM.setEnabled(false); pLeft.add(bM); bOther = new JButton(MC); bOther.addActionListener(this); bOther.setForeground(Color.RED); bOther.setMargin(new Insets(3,2,3,2); pLeft.add(bOther); bOther = new JButton(MR); bOther.addActionListener(this); bOther.setForeground(Color.RED); bOther.setMargin(new Insets(3,2,3,2); pLeft.add(bOther); bOther = new JButton(MS); bOther.addActionListener(this); bOther.setForeground(Color.RED); bOther.setMargin(new Insets(3,2,3,2); pLeft.add(bOther); bOther = new JButton(M+); bOther.addActionListener(this); bOther.setForeground(Color.RED); bOther.setMargin(new Insets(3,2,3,2); pLeft.add(bOther); pBottom.add(pLeft,BorderLayout.WEST); JPanel pRight = new JPanel(); pRight.setLayout(new BorderLayout(); JPanel pUp = new JPanel(); pUp.setLayout(new GridLayout(1,3,3,0); bOther = new JButton(Backspace); bOther.addActionListener(this); bOther.setForeground(Color.RED); bOther.setMargin(new Insets(3,0,3,5); pUp.add(bOther); bOther = new JButton(CE); bOther.addActionListener(this); bOther.setForeground(Color.RED); pUp.add(bOther); bOther = new JButton(C); bOther.addActionListener(this); bOther.setForeground(Color.RED); pUp.add(bOther); JPanel pDown = new JPanel(); pDown.setLayout(new GridLayout(4,5,3,2); bNumber = new JButton(7); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); pDown.add(bNumber); bNumber = new JButton(8); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); pDown.add(bNumber); bNumber = new JButton(9); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); pDown.add(bNumber); bOperator = new JButton(/); bOperator.setForeground(Color.RED); bOperator.addActionListener(this);bOperator.setMargin(new Insets(3,0,3,0); pDown.add(bOperator); bOperator = new JButton(sqrt); bOperator.addActionListener(this); bOperator.setForeground(Color.blue); bOperator.setMargin(new Insets(3,0,3,0); pDown.add(bOperator); bNumber = new JButton(4); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); bNumber.setHorizontalTextPosition(JButton.LEFT); pDown.add(bNumber); bNumber = new JButton(5); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); pDown.add(bNumber); bNumber = new JButton(6); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); pDown.add(bNumber); bOperator = new JButton(*); bOperator.setForeground(Color.RED); bOperator.addActionListener(this); bOperator.setMargin(new Insets(3,3,3,3); pDown.add(bOperator); bOperator = new JButton(%); bOperator.setForeground(Color.blue); bOperator.addActionListener(this); bOperator.setMargin(new Insets(3,3,3,3); pDown.add(bOperator); bNumber = new JButton(1); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); pDown.add(bNumber); bNumber = new JButton(2); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); pDown.add(bNumber); bNumber = new JButton(3); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); pDown.add(bNumber); bOperator = new JButton(-); bOperator.setForeground(Color.RED); bOperator.addActionListener(this); bOperator.setMargin(new Insets(3,3,3,3); pDown.add(bOperator); bOperator = new JButton(1/x); bOperator.setForeground(Color.blue); bOperator.addActionListener(this); pDown.add(bOperator); bNumber = new JButton(0); bNumber.setForeground(Color.blue); bNumber.addActionListener(this); bNumber.setMargin(new Insets(3,3,3,3); pDown.add(bNumber); bOperator = new JButton(+/-); bOperator.setForeground(Color.blue); bOperator.addActionListener(this); bOperator.setMargin(new Insets(3,3,3,3); pDown.add(bOperator); bOperator = new JButton(.); bOperator.setForeground(Color.blue); bOperator.addActionListener(this); bOperator.setMargin(new Insets(3,3,3,3); pDown.add(bOperator); bOperator = new JButton(+); bOperator.setForeground(Color.RED); bOperator.addActionListener(this); bOperator.setMargin(new Insets(3,3,3,3); pDown.add(bOperator); bOperator = new JButton(=); bOperator.setForeground(Color.blue); bOperator.addActionListener(this); bOperator.setMargin(new Insets(3,3,3,3); pDown.add(bOperator); pRight.add(pUp,BorderLayout.NORTH); pRight.add(pDown,BorderLayout.SOUTH); pBottom.add(pRight,BorderLayout.EAST); contentPane.add(pBottom,BorderLayout.SOUTH);f.setSize(new Dimension(320,256);f.setResizable(false); f.setVisible(true); f.addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) System.exit(0); ); public void actionPerformed(ActionEvent e) String s=e.getActionCommand(); if(s.equals(复制(C) String temp=tResult.getText().trim(); copyBoard.replace(0,copyBoard.length(),temp); mPaste.setEnabled(true); else if(s.equals(粘贴(P) tResult.setText(copyBoard.toString(); else if(s.equals(CE) /如果是CE则清除文本框 tResult.setText(0.); else if(s.equals(Backspace) /如果是backspace则删除一个字符。 if(!tResult.getText().trim().equals(0.) /如果文本框中有内容 if(str.length()!=1&str.length()!=0) tResult.setText(str.delete(str.length()-1,str.length().toString(); else tResult.setText(0.); str.setLength(0); op2=Double.parseDouble(tResult.getText().trim(); else if(s.equals(C) /如果是C删除当前计算。 tResult.setText(0.); op1=op2=0; str.replace(0,str.length(), ); preOp=currentOp=0; else if(s.equals(MC) /如果是MC则清除缓冲区 String temp=; memory.replace(0,memory.length(),temp); bM.setText( ); else if(s.equals(MR) /如果按键为MR则恢复缓冲区的数到文本框 tResult.setText(memory.toString(); else if(s.equals(MS) /如果按键为MS则将文本框的数存入缓冲区 String s1=tResult.getText().trim(); memory.replace(0,memory.length(),s1); bM.setText(M); else if(s.equals(M+) /如果按键为MS则将文本框值与缓冲区的数相加但不显示结果。 String temp1=tResult.getText().trim(); double dtemp=Double.parseDouble(temp1); String temp2=memory.toString(); dtemp+=Double.parseDouble(temp2); temp1=String.valueOf(dtemp); memory.replace(0,memory.length(),temp1); else if(s.equals(1/x) /如果按键为1/x则将文本框中的数据置为它的倒数。 String temp=tResult.getText().trim(); double dtemp=Double.parseDouble(temp); tResult.setText(+1/dtemp); else if(s.equals(sqrt) /如果按键为sqrt则将文本框中的内容求平方根 String temp=tResult.getText().trim(); double dtemp=Double.parseDouble(temp); tResult.setText(+Math.sqrt(dtemp); else if(s.equals(+)/+ str.setLength(0); if(currentOp=0) preOp=currentOp=1;/op1=0; op2=0; tResult.setText(+op1); else currentOp =preOp; preOp =1; switch(currentOp) case 1:op1=op1+op2;tResult.setText(+op1);break; case 2:op1=op1-op2;tResult.setText(+op1);break; case 3:op1=op1*op2;tResult.setText(+op1);break; case 4:op1=op1/op2;tResult.setText(+op1);break; else if(s.equals(-)/- str.setLength(0); if(currentOp=0) preOp=currentOp=2;/op1=op2;op2=0; tResult.setText(+op1); else currentOp =preOp; preOp =2; switch(currentOp) case 1:op1=op1+op2;tResult.setText(+op1);break; case 2:op1=op1-op2;tResult.setText(+op1);break; case 3:op1=op1*op2;tResult.setText(+op1);break; case 4:op1=op1/op2;tResult.setText(+op1);break; else if(s.equals(*)/* str.setLength(0); if(currentOp=0) preOp=currentOp=3;/op1=op2;op2=1; tResult.setText(+op1);/op1=op2; else currentOp =preOp; preOp =3; switch(currentOp) case 1:op1=op1+op2;tResult.setText(+op1);break; case 2:op1=op1-op2;tResult.setText(+op1);break; case 3:op1=op1*op2;tResult.setText(+op1);break; case 4:op1=op1/op2;tResult.setText(+op1);break; else if(s.equals(/)/ / str.setLength(0); if(currentOp=0) preOp=currentOp=4;/op2=1; tResult.setText(+op1);/op1=op2; else currentOp =preOp; preOp =4; switch(currentOp) case 1:op1=op1+op2;tResult.setText(+op1);break; case 2:op1=op1-op2;tResult.setText(+op1);break; case 3:op1=op1*op2;tResult.setText(+op1);break;