swing计算器，swing计算器 swing计算器

package com.summit.view; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.text.NumberFormat; import java.text.ParseException; import javax.swing.JButton; import javax.swing.JFormattedTextField; import javax.swing.JFrame; import javax.swing.JTextField; import javax.swing.text.MaskFormatter; import javax.swing.text.NumberFormatter; import com.summit.commons.CalcutorUtil; import com.summit.commons.StringUtil; public class RefactorCalculatorFrame extends JFrame { private JButton[] btnNums = new JButton[10]; private JButton[] btnOpts = new JButton[4]; private JFormattedTextField txtResult = new JFormattedTextField();; private JButton btnEqual = new JButton("="); private JButton btnSpace = new JButton("BackSpace"); private JButton btnClear = new JButton("C"); private static final String[] opts = { "+", "-", "*", "/" }; private double result = 0;// 结果 private char currentOpration = '\0';// 当前操作符 private boolean isOperation = false;// 是否点击操作符 private boolean isEqualClick = false;// 判断是否已经点击 '=' private StringBuffer resultBuffer = new StringBuffer(); private boolean equalOperation = false; public RefactorCalculatorFrame(String title) { setTitle(title); initComents(); addListeners(); txtResult.requestFocus(); setResizable(false); } private void initComents() { this.setLayout(new GridLayout(6, 3)); this.setSize(313, 280); this.setLocationRelativeTo(null); addButtons(); this.setVisible(true); } private void addListeners() { this.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); btnClear.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent arg0) { clearResult(); } }); btnSpace.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { String txt = txtResult.getText(); if (!StringUtil.isEmpty(txt)) { resultBuffer = new StringBuffer(resultBuffer.substring(0, resultBuffer.length() - 1)); txtResult.setText(txt.substring(0, txt.length() - 1)); } } }); btnEqual.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent event) { if (isEqualClick) { if (StringUtil.isEmpty(resultBuffer.toString())) { return; } if (!CalcutorUtil.isCalcute(resultBuffer.toString())) { resultBuffer = new StringBuffer(resultBuffer.substring( 0, resultBuffer.length() - 1)); } result = CalcutorUtil.calcResult(resultBuffer.toString()); txtResult.setText(result + ""); isOperation = false; isEqualClick = false; equalOperation = true; } } }); txtResult.addKeyListener(new KeyAdapter() { int keyoptcount = 0; @Override public void keyReleased(KeyEvent e) { char currentKeyChar = e.getKeyChar(); if (currentKeyChar == '=' || e.getKeyCode() == 10) { if (StringUtil.isEmpty(resultBuffer.toString())) { return; } if (isEqualClick) { System.out.println(resultBuffer.toString()); if (!CalcutorUtil.isCalcute(resultBuffer.toString())) { resultBuffer = new StringBuffer(resultBuffer .substring(0, resultBuffer.length() - 1)); } result = CalcutorUtil.calcResult(resultBuffer .toString()); txtResult.setText(result + ""); isOperation = false; isEqualClick = false; equalOperation = true; return; } } isEqualClick = true; if (e.getKeyCode() == 8) { if (StringUtil.isEmpty(resultBuffer.toString())) { return; } resultBuffer = new StringBuffer(resultBuffer.substring(0, resultBuffer.length() - 1)); return; } if (isOprationChar(e.getKeyChar())) { if(StringUtil.isEmpty(resultBuffer.toString())){ return; } if (!StringUtil.isEmpty(txtResult.getText())) { txtResult.setText(txtResult.getText().substring(0, txtResult.getText().length() - 1)); keyoptcount++; if (keyoptcount > 1) { resultBuffer.setCharAt(resultBuffer.length() - 1,' '); } resultBuffer.append(e.getKeyChar()); if (CalcutorUtil.isCalcute(resultBuffer.substring(0, resultBuffer.length() - 1))) { result = CalcutorUtil.calcResult(resultBuffer .substring(0, resultBuffer.length() - 1)); txtResult.setText(result + ""); resultBuffer = new StringBuffer(result + "" + e.getKeyChar()); isOperation = true; } } } else { if (isOperation) { txtResult.setText(e.getKeyChar() + ""); isOperation = false; } keyoptcount = 0; String value = txtResult.getText(); if (!StringUtil.isNumber(value)) { txtResult.setText(""); } resultBuffer.append(e.getKeyChar()); } txtResult.requestFocus(); } }); } private boolean isOprationChar(char keychar) { for (String opt : opts) { if (opt.equals(keychar + "")) { return true; } } return false; } private void clearResult() { txtResult.setText(""); result = 0; isOperation = false; currentOpration = '\0'; isEqualClick = true; resultBuffer = new StringBuffer(); } private void addButtons() { NumberActionListener numberActionListener = new NumberActionListener(); for (int i = 0; i < btnNums.length; i++) { btnNums[i] = new JButton(); btnNums[i].setSize(30, 15); btnNums[i].setText(i + ""); btnNums[i].addActionListener(numberActionListener); this.add(btnNums[i]); } OprationActionListener optActionListener = new OprationActionListener(); for (int i = 0; i < btnOpts.length; i++) { btnOpts[i] = new JButton(); btnOpts[i].setSize(30, 15); btnOpts[i].setText(opts[i]); btnOpts[i].addActionListener(optActionListener); this.add(btnOpts[i]); } this.add(txtResult); this.add(btnEqual); this.add(btnSpace); this.add(btnClear); } class NumberActionListener implements ActionListener { @Override public void actionPerformed(ActionEvent arg0) { txtResult.requestFocus(); txtResult.setFocusable(true); if (equalOperation) { clearResult(); equalOperation = false; } if (isOperation) { isOperation = false; txtResult.setText(""); } JButton btn_num = (JButton) arg0.getSource(); resultBuffer.append(btn_num.getText()); txtResult.setText(txtResult.getText() + btn_num.getText()); isEqualClick = true; } } class OprationActionListener implements ActionListener { @Override public void actionPerformed(ActionEvent arg0) { txtResult.requestFocus(); if (resultBuffer.length() == 0) { return; } JButton btn_opts = (JButton) arg0.getSource(); if (!isOperation) { currentOpration = btn_opts.getText().charAt(0); resultBuffer.append(currentOpration); isOperation = true; } if (isOperation) {// 连续点击运算符，按最后一次操作符计算 resultBuffer.setCharAt(resultBuffer.length() - 1, ' '); currentOpration = btn_opts.getText().charAt(0); resultBuffer.append(currentOpration); } if (CalcutorUtil.isCalcute(resultBuffer.toString().substring(0, resultBuffer.length() - 1))) { txtResult.setText(""); result = CalcutorUtil.calcResult(resultBuffer.toString() .substring(0, resultBuffer.length() - 1)); txtResult.setText(result + ""); resultBuffer = new StringBuffer(result + "" + currentOpration); }