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c13a40ea95
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601a1864b3
@ -1,29 +0,0 @@
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### IntelliJ IDEA ###
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out/
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!**/src/main/**/out/
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!**/src/test/**/out/
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### Eclipse ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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bin/
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!**/src/main/**/bin/
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!**/src/test/**/bin/
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### NetBeans ###
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/nbproject/private/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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### VS Code ###
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.vscode/
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### Mac OS ###
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.DS_Store
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@ -1,8 +0,0 @@
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# 默认忽略的文件
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/shelf/
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/workspace.xml
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# 基于编辑器的 HTTP 客户端请求
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/httpRequests/
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# Datasource local storage ignored files
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/dataSources/
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/dataSources.local.xml
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@ -1,6 +0,0 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
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<output url="file://$PROJECT_DIR$/out" />
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</component>
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</project>
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@ -1,8 +0,0 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="ProjectModuleManager">
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<modules>
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<module fileurl="file://$PROJECT_DIR$/Computer.iml" filepath="$PROJECT_DIR$/Computer.iml" />
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</modules>
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</component>
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</project>
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@ -1,11 +0,0 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="GitSharedSettings">
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<option name="FORCE_PUSH_PROHIBITED_PATTERNS">
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<list />
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</option>
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</component>
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<component name="VcsDirectoryMappings">
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<mapping directory="" vcs="Git" />
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</component>
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</project>
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@ -1,11 +0,0 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<module type="JAVA_MODULE" version="4">
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<component name="NewModuleRootManager" inherit-compiler-output="true">
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<exclude-output />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>
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@ -1,119 +0,0 @@
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package computer;
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import javax.swing.*;
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import java.awt.*;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import java.text.MessageFormat;
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import java.util.Arrays;
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public class com {
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public static void main(String[] args) {
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new JS();
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}
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}
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class JS extends JFrame implements ActionListener {
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private final StringBuilder sBuilder = new StringBuilder();
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JTextArea text = new JTextArea();
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double a, b;
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Double sum;
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String lastOperator = "=";
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public JS() {
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setBounds(100, 100, 400, 400);
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setTitle("计算器");
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JMenuBar menubar = new JMenuBar();
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this.setJMenuBar(menubar);
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this.setLayout(new BorderLayout());
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JPanel p1 = new JPanel();
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JPanel p2 = new JPanel();
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text.setPreferredSize(new Dimension(370, 60));
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p2.setLayout(new FlowLayout());
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p1.add(text);
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this.add(p1, BorderLayout.NORTH);
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p2.setLayout(new GridLayout(5, 4));
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JButton[] button = new JButton[20];
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button[0] = new JButton("C");
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button[1] = new JButton("CE");
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button[2] = new JButton("%");
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button[3] = new JButton("÷");
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button[4] = new JButton("7");
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button[5] = new JButton("8");
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button[6] = new JButton("9");
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button[7] = new JButton("*");
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button[8] = new JButton("4");
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button[9] = new JButton("5");
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button[10] = new JButton("6");
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button[11] = new JButton("-");
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button[12] = new JButton("1");
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button[13] = new JButton("2");
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button[14] = new JButton("3");
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button[15] = new JButton("+");
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button[16] = new JButton(" ");
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button[17] = new JButton("0");
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button[18] = new JButton(".");
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button[19] = new JButton("=");
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Arrays.stream(button).forEach(p2::add);
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this.add(p2, BorderLayout.CENTER);
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for (JButton jButton : button) {
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jButton.addActionListener(this);
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}
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this.setVisible(true);
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this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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}
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public void actionPerformed(ActionEvent e) {
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String lab = e.getActionCommand();
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if (Character.isDigit(lab.charAt(0)) || lab.equals(".")) {
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sBuilder.append(lab);
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text.setText(sBuilder.toString());
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} else if (lab.equals("CE")) {
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sBuilder.deleteCharAt(sBuilder.length() - 1);
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text.setText(sBuilder.toString());
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} else if (lab.equals("C")) {
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sBuilder.setLength(0);
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text.setText("");
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} else if (lab.equals("+") || lab.equals("-") || lab.equals("*") || lab.equals("÷") || lab.equals("%")) {
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if (sBuilder.length() > 0) {
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a = Double.parseDouble(sBuilder.toString());
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sBuilder.setLength(0);
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lastOperator = lab;
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text.setText(MessageFormat.format("{0} {1} ", a, lastOperator));
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}
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} else if (lab.equals("=")) {
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if (lastOperator != null && !lastOperator.isEmpty() && sBuilder.length() > 0) {
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b = Double.parseDouble(sBuilder.toString());
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calculate();
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}
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}
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}
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private void calculate() {
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switch (lastOperator) {
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case "+":
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sum = a + b;
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break;
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case "-":
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sum = a - b;
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break;
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case "*":
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sum = a * b;
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break;
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case "÷":
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if (b == 0) {
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text.setText("除数不能为0");
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return;
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}
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sum = a / b;
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break;
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case "%":
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if (b == 0) {
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text.setText("除数不能为0");
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return;
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}
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sum = a % b;
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break;
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}
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text.setText(sum + "");
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sBuilder.setLength(0);
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sBuilder.append(sum);
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lastOperator = "=";
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}
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}
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