Java编写的大数运算

package keyconculator; import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.awt.Toolkit; import java.awt.datatransfer.Clipboard; import java.awt.datatransfer.StringSelection; public class KeyCalculator extends JFrame{ private static final long serialVersionUID = 1L; JPanel contentPane; JTextField jTextField1 = new JTextField("0"); JButton jButton1 = new JButton(); JButton jButton2 = new JButton(); JButton jButton3 = new JButton(); JButton jButton4 = new JButton(); JButton jButton5 = new JButton(); JButton jButton6 = new JButton(); JButton jButton7 = new JButton(); JButton jButton8 = new JButton(); JButton jButton9 = new JButton(); JButton jButton10 = new JButton(); JButton jButton11 = new JButton(); JButton jButton12 = new JButton(); JButton jButton13 = new JButton(); JButton jButton14 = new JButton(); JButton jButton15 = new JButton(); JButton jButton16 = new JButton(); JButton jButton17 = new JButton(); JButton jButton18 = new JButton(); JButton jButton19 = new JButton(); JButton jButton20 = new JButton(); boolean able_Input=true; boolean Ctrl=false; String str=null,str2=null; String oper=null,old_oper=null; Strr BigNum1=new Strr(); Strr BigNum2=new Strr(); Arithmetic Calculators=new Arithmetic(); Clipboard clipboard=Toolkit.getDefaultToolkit().getSystemClipboard(); //添加KeyCalculator类构造函数 public KeyCalculator() { enableEvents(AWTEvent.WINDOW_EVENT_MASK); try { jbInit(); } catch (Exception e) { e.printStackTrace(); } } //设计计算器的外观和行为 private void jbInit() throws Exception { this.setLocation(500,300); //this.setLocale(java.util.Locale.getDefault()); this.setSize(new Dimension(245, 295)); this.setTitle("计算器"); this.addKeyListener(new KeyCalculator_this_keyAdapter(this)); jTextField1.setEditable(false); jTextField1.setFocusable(true); jTextField1.setBackground(Color.white); jTextField1.setBounds(new Rectangle(23, 12, 200, 21)); jTextField1.setHorizontalAlignment(JTextField.RIGHT); jButton1.setBounds(new Rectangle(23, 103, 47, 25)); jButton1.setText("9"); jButton1.addActionListener(new KeyCalculator_jButton1_actionAdapter(this)); jButton2.setBounds(new Rectangle(73, 103, 46, 25)); jButton2.setText("8"); jButton2.addActionListener(new KeyCalculator_jButton2_actionAdapter(this)); jButton3.setBounds(new Rectangle(123, 103, 46, 25)); jButton3.setText("7"); jButton3.addActionListener(new KeyCalculator_jButton3_actionAdapter(this)); jButton4.setBounds(new Rectangle(173, 200, 50, 25)); jButton4.setToolTipText(""); jButton4.setText("+"); jButton4.setForeground(Color.red); jButton4.addActionListener(new KeyCalculator_jButton4_actionAdapter(this)); jButton5.setBounds(new Rectangle(23, 135, 46, 25)); jButton5.setText("6"); jButton5.addActionListener(new KeyCalculator_jButton5_actionAdapter(this)); jButton6.setBounds(new Rectangle(73, 135, 46, 25)); jButton6.setText("5"); jButton6.addActionListener(new KeyCalculator_jButton6_actionAdapter(this)); jButton7.setBounds(new Rectangle(123, 135, 46, 25)); jButton7.setForeground(Color.black); jButton7.setText("4"); jButton7.addActionListener(new KeyCalculator_jButton7_actionAdapter(this)); jButton8.setBounds(new Rectangle(173, 168, 50, 25)); jButton8.setText("-"); jButton8.setForeground(Color.red); jButton8.addActionListener(new KeyCalculator_jButton8_actionAdapter(this)); jButton9.setBounds(new Rectangle(23, 168, 46, 25)); jButton9.setHorizontalAlignment(SwingConstants.CENTER); jButton9.setText("3"); jButton9.addActionListener(new KeyCalculator_jButton9_actionAdapter(this)); jButton10.setBounds(new Rectangle(73, 168, 46, 25)); jButton10.setText("2"); jButton10.addActionListener(new KeyCalculator_jButton10_actionAdapter(this)); jButton11.setBounds(new Rectangle(123, 168, 46, 25)); jButton11.setForeground(Color.black); jButton11.setText("1"); jButton11.addActionListener(new KeyCalculator_jButton11_actionAdapter(this)); jButton12.setBounds(new Rectangle(173, 135, 50, 25)); jButton12.setVerifyInputWhenFocusTarget(true); jButton12.setText("*"); jButton12.setForeground(Color.red); jButton12.addActionListener(new KeyCalculator_jButton12_actionAdapter(this)); jButton13.setBounds(new Rectangle(23, 200, 46, 25)); jButton13.setToolTipText(""); jButton13.setText("0"); jButton13.addActionListener(new KeyCalculator_jButton13_actionAdapter(this)); jButton14.setBounds(new Rectangle(73, 200, 46, 25)); jButton14.setToolTipText(""); jButton14.setText("+/-"); jButton14.setFont(new java.awt.Font("Dialog", 0, 10)); jButton14.addActionListener(new KeyCalculator_jButton14_actionAdapter(this)); jButton15.setBounds(new Rectangle(123, 200, 46, 25)); jButton15.setToolTipText(""); jButton15.setText("."); jButton15.addActionListener(new KeyCalculator_jButton15_actionAdapter(this)); jButton16.setBounds(new Rectangle(173, 103, 50, 25)); jButton16.setText("/"); jButton16.setForeground(Color.red); jButton16.addActionListener(new KeyCalculator_jButton16_actionAdapter(this)); jButton17.setBounds(new Rectangle(23, 39, 96, 25)); jButton17.setText("Backspace"); jButton17.setForeground(Color.red); jButton17.setFont(new java.awt.Font("Dialog", 0, 11)); jButton17.addActionListener(new KeyCalculator_jButton17_actionAdapter(this)); jButton18.setBounds(new Rectangle(123, 39, 100, 25)); jButton18.setSelected(false); jButton18.setText("CE"); jButton18.setForeground(Color.red); jButton18.setFont(new java.awt.Font("Dialog", 0, 11)); jButton18.addActionListener(new KeyCalculator_jButton18_actionAdapter(this)); jButton19.setBounds(new Rectangle(23, 71, 96, 25)); jButton19.setVerifyInputWhenFocusTarget(true); jButton19.setText("C"); jButton19.setForeground(Color.red); jButton19.setFont(new java.awt.Font("Dialog", 0, 11)); jButton19.addActionListener(new KeyCalculator_jButton19_actionAdapter(this)); jButton20.setBounds(new Rectangle(123, 71, 100, 25)); jButton20.setText("="); jButton20.setForeground(Color.red); jButton20.addActionListener(new KeyCalculator_jButton20_actionAdapter(this)); contentPane=(JPanel)this.getContentPane(); contentPane.setLayout(null); contentPane.setForeground(Color.black); contentPane.add(jTextField1, null); contentPane.add(jButton1, null); contentPane.add(jButton2, null); contentPane.add(jButton3, null); contentPane.add(jButton4, null); contentPane.add(jButton5, null); contentPane.add(jButton6, null); contentPane.add(jButton7, null); contentPane.add(jButton8, null); contentPane.add(jButton9, null); contentPane.add(jButton10, null); contentPane.add(jButton11, null); contentPane.add(jButton12, null); contentPane.add(jButton13, null); contentPane.add(jButton14, null); contentPane.add(jButton15, null); contentPane.add(jButton16, null); contentPane.add(jButton17, null); contentPane.add(jButton18, null); contentPane.add(jButton19, null); contentPane.add(jButton20, null); jButton1.setFocusable(false); jButton2.setFocusable(false); jButton3.setFocusable(false); jButton4.setFocusable(false); jButton5.setFocusable(false); jButton6.setFocusable(false); jButton7.setFocusable(false); jButton8.setFocusable(false); jButton9.setFocusable(false); jButton11.setFocusable(false); jButton12.setFocusable(false); jButton13.setFocusable(false); jButton14.setFocus