Java用eclipse插件计算器

import javax.swing.JDialog; import javax.swing.JPanel; import javax.swing.JFrame; import javax.swing.JMenuBar; import javax.swing.JMenu; import java.awt.Rectangle; import java.awt.TextField; import javax.swing.JButton; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JMenuItem; import java.awt.Font; import javax.swing.JTextField; public class MainMenu extends JFrame { double result=0; boolean start=true; String lastCommand="+"; private static final long serialVersionUID = 1L; private JPanel jContentPane = null; private JMenuBar jJMenuBar = null; private JMenu Compile = null; private JButton num1 = null; private JButton num2 = null; private JButton num3 = null; private JButton num4 = null; private JButton num5 = null; private JButton num6 = null; private JButton num7 = null; private JButton num8 = null; private JButton num9 = null; private JButton num0 = null; private JButton point = null; private JButton equal = null; private JButton division = null; private JButton multiply = null; private JButton plus = null; private JButton minus = null; private JMenuItem Copy = null; private JMenuItem Paste = null; private JMenu Help = null; private JMenuItem AboutCalculator = null; private JButton PlusMinus = null; private JButton Clean = null; private JButton Cancel = null; private JButton Sqrt = null; private JTextField ShowResult = null; /** * This is the default constructor */ public MainMenu() { super(); initialize(); } /** * This method initializes this * * @return void */ private void initialize() { this.setSize(320, 260); this.setFont(new Font("Dialog", Font.PLAIN, 36)); this.setJMenuBar(getJJMenuBar()); this.setContentPane(getJContentPane()); /*Toolkit toolkit=Toolkit.getDefaultToolkit(); Dimension scmsize = toolkit.getScreenSize(); int width=this.getWidth(); int height=this.getHeight(); this.setLocation(scmsize.width/2-this.getWidth()/2,scmsize.height/2-this.getHeight()/2); */ this.setResizable(false); this.setTitle("计算器"); this.setVisible(true); } /** * This method initializes jContentPane * * @return javax.swing.JPanel */ private JPanel getJContentPane() { if (jContentPane == null) { jContentPane = new JPanel(); jContentPane.setLayout(null); jContentPane.add(getNum1(), null); jContentPane.add(getNum2(), null); jContentPane.add(getNum3(), null); jContentPane.add(getNum4(), null); jContentPane.add(getNum5(), null); jContentPane.add(getNum6(), null); jContentPane.add(getNum7(), null); jContentPane.add(getNum8(), null); jContentPane.add(getNum9(), null); jContentPane.add(getNum0(), null); jContentPane.add(getPoint(), null); jContentPane.add(getEqual(), null); jContentPane.add(getDivision(), null); jContentPane.add(getMultiply(), null); jContentPane.add(getPlus(), null); jContentPane.add(getMinus(), null); jContentPane.add(getPlusMinus(), null); jContentPane.add(getClean(), null); jContentPane.add(getCancel(), null); jContentPane.add(getSqrt(), null); jContentPane.add(getShowResult(), null); } return jContentPane; } /** * This method initializes jJMenuBar * * @return javax.swing.JMenuBar */ private JMenuBar getJJMenuBar() { if (jJMenuBar == null) { jJMenuBar = new JMenuBar(); jJMenuBar.add(getCompile()); jJMenuBar.add(getHelp()); } return jJMenuBar; } /** * This method initializes Compile * * @return javax.swing.JMenu */ private JMenu getCompile() { if (Compile == null) { Compile = new JMenu(); Compile.setText("编辑"); Compile.add(getCopy()); Compile.add(getPaste()); } return Compile; } /** * This method initializes num1 * * @return javax.swing.JButton */ /* public void actionPerformed(ActionEvent e) { JButton temp=(JButton)(e.getSource()); ShowResult.setText(ShowResult.getText()+temp.getText().trim()); } */ private JButton getNum1() { if (num1 == null) { num1 = new JButton(); num1.setText("1"); num1.setBounds(new Rectangle(4, 120, 60, 36)); //num1.addActionListener(this); num1.addActionListener(new InsertAction()); } return num1; } /** * This method initializes num2 * * @return javax.swing.JButton */ private JButton getNum2() { if (num2 == null) { num2 = new JButton(); num2.setBounds(new Rectangle(66, 120, 60, 36)); num2.setText("2"); //num2.addActionListener(this); num2.addActionListener(new InsertAction()); } return num2; } /** * This method initializes num3 * * @return javax.swing.JButton */ private JButton getNum3() { if (num3 == null) { num3 = new JButton(); num3.setBounds(new Rectangle(128, 120, 60, 36)); num3.setText("3"); //num3.addActionListener(this); num3.addActionListener(new InsertAction()); } return num3; } /** * This method initializes num4 * * @return javax.swing.JButton */ private JButton getNum4() { if (num4 == null) { num4 = new JButton(); num4.setBounds(new Rectangle(4, 82, 60, 36)); num4.setText("4"); //num4.addActionListener(this); num4.addActionListener(new InsertAction()); } return num4; } /** * This method initializes num5 * * @return javax.swing.JButton */ private JButton getNum5() { if (num5 == null) { num5 = new JButton(); num5.setBounds(new Rectangle(66, 82, 60, 36)); num5.setText("5"); //num5.addActionListener(this); num5.addActionListener(new InsertAction()); } return num5; } /** * This method initializes num6 * * @return javax.swing.JButton */ private JButton getNum6() { if (num6 == null) { num6 = new JButton(); num6.setBounds(new Rectangle(128, 82, 60, 36)); num6.setText("6"); //num6.addActionListener(this); num6.addActionListener(new InsertAction()); } return num6; } /** * This method initializes num7 * * @return javax.swing.JButton */ private JButton getNum7() { if (num7 == null) { num7 = new JButton(); num7.setBounds(new Rectangle(4, 44, 60, 36)); num7.setText("7"); //num7.addActionListener(this); num7.addActionListener(new InsertAction()); } return num7; } /** * This method initializes num8 * * @return javax.swing.JButton */ private JButton getNum8() { if (num8 == null) { num8 = new JButton(); num8.setBounds(new Rectangle(66, 44, 60, 36)); num8.setText("8"); //num8.addActionListener(this); num8.addActionListener(new InsertAction()); } return num8; } /** * This method initializes num9 * * @return javax.swing.JButton */ private JButton getNum9() { if (num9 == null) { num9 = new JButton(); num9.setBounds(new Rectangle(128, 44, 60, 36)); num9.setText("9"); //num9.addActionListener(this); num9.addActionListener(new InsertAction()); } return num9; } /** * This method initializes num0 * * @return javax.swing.JButton */ private JButton getNum0() { if (num0 == null) { num0 = new JButton(); num0.setBounds(new Rectangle(4, 158, 60, 36)); num0.setText("0"); //num0.addActionListener(this); num0.addActionListener(new InsertAction()); } return num0; } /** * This method initializes point * * @return javax.swing.JButton */ private JButton getPoint() { if (point == null) { point = new JButton(); point.setBounds(new Rectangle(128, 158, 60, 36)); point.setText("."); //point.addActionListener(this); point.addActionListener(new InsertAction())