1、 private JButton jButton6 = null; private JButton jButton7 = null; private JButton jButton8 = null; private JButton jButton9 = null; private JButton jButton10 = null; private JButton jButton11 = null; private JButton jButton12 = null; private JButton jButton13 = null; private JButton jButton14 = nul
2、l; private JButton jButton15 = null; private double result=0; private String lastCommand=; / jve:decl-index=0: private boolean start=true; private JPanel jPanel1 = null; private JButton jButton16 = null; /* * This is the default constructor */ public qwert() super(); initialize(); * This method init
3、ializes this * * return void private void initialize() this.setSize(300, 200); this.setContentPane(getJContentPane(); this.setTitle(计算器); * This method initializes jContentPane * return javax.swing.JPanel private JPanel getJContentPane() if (jContentPane = null) jContentPane = new JPanel(); jContent
4、Pane.setLayout(new BorderLayout(); jContentPane.add(getJPanel1(), BorderLayout.EAST); jContentPane.add(getJTextField(), BorderLayout.NORTH); jContentPane.add(getJPanel(), BorderLayout.CENTER); return jContentPane; * This method initializes jTextField * * return javax.swing.JTextField private JTextFi
5、eld getJTextField() if (jTextField = null) jTextField = new JTextField(); return jTextField; * This method initializes jPanel * return javax.swing.JPanel private JPanel getJPanel() if (jPanel = null) GridLayout gridLayout = new GridLayout(4,4); jPanel = new JPanel(); jPanel.setComponentOrientation(C
6、omponentOrientation.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);
7、 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); r
8、eturn jPanel; * This method initializes jButton * return javax.swing.JButton private JButton getJButton() if (jButton = null) jButton = new JButton(); jButton.setText(1 jButton.addActionListener(new java.awt.event.ActionListener() public void actionPerformed(java.awt.event.ActionEvent e) String inpu
9、t=e.getActionCommand(); if(start) jTextField.setText( start=false; jTextField.setText(jTextField.getText()+input); ); return jButton; * This method initializes jButton1 private JButton getJButton1() if (jButton1 = null) jButton1 = new JButton(); jButton1.setText(9 jButton1.addActionListener(new java
10、.awt.event.ActionListener() return jButton1; * This method initializes jButton2 private JButton getJButton2() if (jButton2 = null) jButton2 = new JButton(); jButton2.setText(* jButton2.addActionListener(new java.awt.event.ActionListener() calculate(Double.parseDouble(jTextField.getText(); lastComman
11、d=input; start=true; return jButton2; * This method initializes jButton3 private JButton getJButton3() if (jButton3 = null) jButton3 = new JButton(); jButton3.setText(0 jButton3.addActionListener(new java.awt.event.ActionListener() return jButton3; * This method initializes jButton4 private JButton
12、getJButton4() if (jButton4 = null) jButton4 = new JButton(); jButton4.setText(. jButton4.addActionListener(new java.awt.event.ActionListener() return jButton4; * This method initializes jButton5 private JButton getJButton5() if (jButton5 = null) jButton5 = new JButton(); jButton5.setText( jButton5.a
13、ddActionListener(new java.awt.event.ActionListener() return jButton5; * This method initializes jButton6 private JButton getJButton6() if (jButton6 = null) jButton6 = new JButton(); jButton6.setText(8 jButton6.addActionListener(new java.awt.event.ActionListener() return jButton6; * This method initi
14、alizes jButton7 private JButton getJButton7() if (jButton7 = null) jButton7 = new JButton(); jButton7.setText(7 jButton7.addActionListener(new java.awt.event.ActionListener() return jButton7; * This method initializes jButton8 private JButton getJButton8() if (jButton8 = null) jButton8 = new JButton
15、(); jButton8.setText(2 jButton8.addActionListener(new java.awt.event.ActionListener() return jButton8; * This method initializes jButton9 private JButton getJButton9() if (jButton9 = null) jButton9 = new JButton(); jButton9.setText(/ jButton9.addActionListener(new java.awt.event.ActionListener() ret
16、urn jButton9; * This method initializes jButton10 private JButton getJButton10() if (jButton10 = null) jButton10 = new JButton(); jButton10.setText(- jButton10.addActionListener(new java.awt.event.ActionListener() return jButton10; * This method initializes jButton11 private JButton getJButton11() i
17、f (jButton11 = null) jButton11 = new JButton(); jButton11.setText(6 jButton11.addActionListener(new java.awt.event.ActionListener() return jButton11; * This method initializes jButton12 private JButton getJButton12() if (jButton12 = null) jButton12 = new JButton(); jButton12.setText(3 jButton12.addActionListener(new java.awt.event.ActionListener() p