From 3d32355d1c427f4e3918b73de46babe610227e11 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E5=8D=A2=E5=98=89=E6=9D=B0?= <鍗㈠槈鏉癅LAPTOP-7N93DN77> Date: Fri, 11 Jun 2021 00:28:10 +0800 Subject: [PATCH] =?UTF-8?q?=E5=B7=B2=E5=AE=8C=E6=88=90?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- src/Calculator.java | 463 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 463 insertions(+) create mode 100644 src/Calculator.java diff --git a/src/Calculator.java b/src/Calculator.java new file mode 100644 index 0000000..a5260c1 --- /dev/null +++ b/src/Calculator.java @@ -0,0 +1,463 @@ + +import javax.swing.*; +import javax.swing.text.BadLocationException; +import javax.swing.text.Document; +import javax.swing.text.JTextComponent; +import java.awt.*; +import java.awt.datatransfer.Clipboard; +import java.awt.datatransfer.DataFlavor; +import java.awt.datatransfer.StringSelection; +import java.awt.datatransfer.Transferable; +import java.awt.datatransfer.UnsupportedFlavorException; +import java.awt.event.*; +import java.io.IOException; + +public class Calculator extends MouseAdapter { + JFrame list; + JTextField show; + JButton[] jbNum = new JButton[10]; + //设置面板 + JPanel jpMain; + JPanel jpRight; + JPanel jpLight; + //设置按钮 + JButton dight; // 小数点 + JButton sign; // 正负号 + JButton add; + JButton sub; + JButton multiply; + JButton divide; + JButton power; // 求幂 + JButton cos; + JButton sin; + JButton ln; + JButton ce; // 清除 + JButton equal; // 等于 + JButton mod; // 取余 + JButton sqrt; + double sum = 0; // 临时结果 + boolean b = false; // 监控运算符是否被点击,错误是否出现 + operator i = operator.un; // 记录等号符点击前某一运算符点击次数 + + int op; // 记录操作符 + +// 枚举操作符 + enum operator { + add, sub, mul, div, mod, pow, sin, cos, sqrt, ln, un + } + //界面 + void display() { + list = new JFrame("计算器"); + list.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); + list.setSize(360, 230); + list.setLocation(400, 300); + list.setBackground(Color.LIGHT_GRAY); // 设置窗口背景颜色 + list.setResizable(false); + + list.setLayout(new FlowLayout(FlowLayout.CENTER)); + show = new JTextField(31); + show.setHorizontalAlignment(JTextField.RIGHT); // 文本框内文字右对齐 + show.setEditable(false); // 文本框不可编辑 + list.add(show); + // 创建面板并设置布局 + jpMain = new JPanel(); + jpRight = new JPanel(); + jpLight = new JPanel(); + jpMain.setLayout(new GridLayout(1, 2)); + jpRight.setLayout(new GridLayout(4, 3, 3, 3)); + jpLight.setLayout(new GridLayout(4, 3, 3, 3)); + list.add(jpMain); + jpMain.add(jpLight); + jpMain.add(jpRight); + // 创建0~9按钮对象 + for (int i = 9; i >= 0; i--) { + jbNum[i] = new JButton(String.valueOf(i)); + jbNum[i].setForeground(Color.BLUE); + jpLight.add(jbNum[i]); + jbNum[i].addMouseListener(this); + } + add = new JButton("+"); + sub = new JButton("-"); + multiply = new JButton("*"); + divide = new JButton("/"); + power = new JButton("x^y"); + sin = new JButton("sin"); + cos = new JButton("cos"); + ln = new JButton("ln"); + ce = new JButton("CE"); + equal = new JButton("="); + mod = new JButton("%"); + sqrt = new JButton("sqrt"); + jpRight.add(divide); + jpRight.add(sqrt); + jpRight.add(ln); + jpRight.add(multiply); + jpRight.add(sin); + jpRight.add(mod); + jpRight.add(sub); + jpRight.add(cos); + jpRight.add(ce); + jpRight.add(add); + jpRight.add(power); + jpRight.add(equal); + + // 给所有按钮注册监听器 + dight = new JButton("."); + sign = new JButton("±"); + jpLight.add(sign); + jpLight.add(dight); + add.addMouseListener(this); + sub.addMouseListener(this); + multiply.addMouseListener(this); + divide.addMouseListener(this); + power.addMouseListener(this); + sin.addMouseListener(this); + cos.addMouseListener(this); + ln.addMouseListener(this); + ce.addMouseListener(this); + equal.addMouseListener(this); + mod.addMouseListener(this); + sqrt.addMouseListener(this); + dight.addMouseListener(this); + sign.addMouseListener(this); + + //菜单 + + JMenuBar mb = new JMenuBar(); + final JPopupMenu myPopMenu = new JPopupMenu(); + JMenu edit = new JMenu("编辑"); + JMenu look = new JMenu("查看"); + JMenu help = new JMenu("帮助"); + JMenuItem copy = new JMenuItem("复制"); + JMenuItem paste = new JMenuItem("粘贴"); + JMenuItem standard = new JMenuItem("标准型"); + JMenuItem helptheme = new JMenuItem("帮助主题"); + JMenuItem aboutcclt = new JMenuItem("关于计算器"); + copy.addMouseListener( this); + paste.addMouseListener(this); + helptheme.addMouseListener(this); + aboutcclt.addMouseListener(this); + mb.add(edit); + mb.add(look); + mb.add(help); + edit.add(copy); + edit.add(paste); + look.add(standard); + help.add(helptheme); + help.add(aboutcclt); + list.setJMenuBar(mb); + list.setVisible(true); + } + + public void mouseClicked(MouseEvent e) { + // 0~9的输入 + if (e.getSource() == jbNum[0]) { + input(0, e); + } + if (e.getSource() == jbNum[1]) { + input(1, e); + } + + if (e.getSource() == jbNum[2]) { + input(2, e); + } + if (e.getSource() == jbNum[3]) { + input(3, e); + } + if (e.getSource() == jbNum[4]) { + input(4, e); + } + if (e.getSource() == jbNum[5]) { + input(5, e); + } + if (e.getSource() == jbNum[6]) { + input(6, e); + } + if (e.getSource() == jbNum[7]) { + input(7, e); + } + if (e.getSource() == jbNum[8]) { + input(8, e); + } + if (e.getSource() == jbNum[9]) { + input(9, e); + } + + // 小数点,正负号，CE,等号 + if (e.getSource() == dight) { + if (show.getText().indexOf('.') == -1) { + show.setText(show.getText() + "."); + } + + } + if (e.getSource() == sign) { + if (show.getText().indexOf("-") == -1) { + show.setText("-" + show.getText()); + } else { + show.setText(show.getText().replace('-', '\0')); + } + + } + if (e.getSource() == ce) { + show.setText("0"); + sum = 0; + i = operator.un; + b = false; + } + outer: if (e.getSource() == equal) { + try { + if (i == operator.un) { + b = true; + } else { + if (i == operator.add) { + sum += Double.parseDouble(show.getText()); + + } + if (i == operator.sub) { + sum -= Double.parseDouble(show.getText()); + + } + if (i == operator.mul) { + sum *= Double.parseDouble(show.getText()); + + } + if (i == operator.div) { + if (Double.parseDouble(show.getText()) != 0) { + sum /= Double.parseDouble(show.getText()); + + } else { + show.setText("ERROR"); + b = true; + sum = 0; + break outer; // 不执行trimIn()方法 屏幕显示错误 + } + } + if (i == operator.mod) { + sum %= Double.parseDouble(show.getText()); + + } + if (i == operator.pow) { + sum = Math.pow(sum, Double.parseDouble(show.getText())); + + } + trimIn(sum); + } + } catch (Exception ex) { + show.setText("ERROR"); + b = true; + sum = 0; + } + + sum = 0; + i = operator.un; + b = true; + } + // 加减乘除//幂指函数//取余 + if (e.getSource() == add) { + cal(i); + i = operator.add; + b = true; + + } + if (e.getSource() == sub) { + cal(i); + i = operator.sub; + b = true; + + } + if (e.getSource() == multiply) { + cal(i); + i = operator.mul; + b = true; + + } + if (e.getSource() == divide) { + cal(i); + i = operator.div; + b = true; + + } + if (e.getSource() == mod) { + cal(i); + i = operator.mod; + b = true; + + } + if (e.getSource() == power) { + cal(i); + i = operator.pow; + b = true; + + } + + // sqrt，sin,cos,ln + try { + if (show.getText() != "ERROR") { + if (e.getSource() == sqrt) { + sum = Math.sqrt(Double.parseDouble(show.getText())); + trimIn(sum); + b = true; + } + if (e.getSource() == sin) { + sum = Math.sin(Double.parseDouble(show.getText())); + trimIn(sum); + b = true; + } + if (e.getSource() == cos) { + sum = Math.cos(Double.parseDouble(show.getText())); + trimIn(sum); + b = true; + } + if (e.getSource() == ln) { + sum = Math.log(Double.parseDouble(show.getText())); + trimIn(sum); + b = true; + } + } + + + + + + + if (e.getSource() == "复制") { + copy(); + } + else if (e.getSource() == "粘贴") { + paste(); + } + else if (e.getSource() == "关于计算器") { + JOptionPane.showMessageDialog(null,"ljj编写","软件信息",JOptionPane. INFORMATION_MESSAGE);} + + }catch (Exception ex) { + show.setText("ERROR"); + b = true; + } + } + + + // 用以四则运算和求幂和取模的方法 + public void cal(operator i) { + try { + if (show.getText() != "ERROR") { + if (i == operator.un) { + sum = Double.parseDouble(show.getText()); + } + if (i == operator.add) { + sum += Double.parseDouble(show.getText()); + trimIn(sum); + } + if (i == operator.sub) { + sum -= Double.parseDouble(show.getText()); + trimIn(sum); + } + if (i == operator.mul) { + sum *= Double.parseDouble(show.getText()); + trimIn(sum); + } + if (i == operator.div) { + if (Double.parseDouble(show.getText()) != 0) { + sum /= Double.parseDouble(show.getText()); + trimIn(sum); + } else { + //出现0后，把一切数据重置 + show.setText("ERROR"); + sum = 0; + b = true; + i=operator.un; + } + } + //取余 + if (i == operator.mod) { + sum %= Double.parseDouble(show.getText()); + trimIn(sum); + } + //幂指函数 + if (i == operator.pow) { + sum = Math.pow(sum, Double.parseDouble(show.getText())); + trimIn(sum); + } + } + } catch (Exception ex) { + show.setText("ERROR"); + b = true; + } + } + + // 点击数字输入 + public void input(int i, MouseEvent e) { + if (b == true) { + show.setText(String.valueOf(i)); + b = false; + } else { + + if (show.getText().indexOf('0') == 0 && e.getSource() != dight) { + show.setText(String.valueOf(i)); + } else { + show.setText(show.getText() + String.valueOf(i)); + } + } + } + + // sum的显示，整数的去掉小数点和0 + public void trimIn(double sum) { + if (show.getText().indexOf('.') != -1 && + show.getText().endsWith("0")) { + show.setText((String.valueOf(sum).substring(0, String.valueOf(sum) + .indexOf('.')))); + } else if (String.valueOf(sum).indexOf('.') != -1 + && String.valueOf(sum).endsWith("0")) { + show.setText((String.valueOf(sum).substring(0, String.valueOf(sum) + .indexOf('.')))); + + } else if (Double.isNaN(sum)) { + show.setText("ERROR"); //不 是数字时 屏幕显示错误，并把sum置于0 运算符置UN + b = true; + sum = 0; + i = operator.un; + } else if (Double.isInfinite(sum)) { + show.setText("ERROR"); //出现infinite(无限大)时显示错误SUM置0运算符置UN + b = true; + sum = 0; + i = operator.un; + } else { + show.setText(String.valueOf(sum)); + } + } + //复制 + public void copy() { + JTextComponent myarea = null; + if (myarea.getSelectedText() == null) { + JOptionPane.showMessageDialog(null, "你没有选中任何字符！", "提示", JOptionPane.WARNING_MESSAGE); + } + Clipboard clipBoard = Toolkit.getDefaultToolkit().getSystemClipboard(); + StringSelection stringSelection = new StringSelection(myarea.getSelectedText()); + clipBoard.setContents(stringSelection, null); + } + //粘贴 + public void paste() throws UnsupportedFlavorException, IOException { + String content_copy = ""; + // 构造系统剪切板 + Clipboard clipBoard = Toolkit.getDefaultToolkit().getSystemClipboard(); + + // 获取剪切板内容 + Transferable content = clipBoard.getContents(null); + + if (content != null) { + if (content.isDataFlavorSupported(DataFlavor.stringFlavor)) { + content_copy = (String) content.getTransferData(DataFlavor.stringFlavor); + + JTextComponent myarea = null; + if (myarea.getSelectedText() != null) { + myarea.replaceSelection(content_copy); + } + } + } + } + public static void main(String[] args) { + + Calculator c = new Calculator(); + c.display(); + } + +} \ No newline at end of file -- Gitee