.idea/.gitignore

@@ -0,0 +1,8 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/misc.xml

@@ -0,0 +1,5 @@
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/UML.iml" filepath="$PROJECT_DIR$/UML.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

README.md

@@ -1,2 +0,0 @@
-# xzy
-

UML.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

src/Computer.java

@@ -0,0 +1,148 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.*;
+public class Computer extends JFrame{
+    private static final long serialVersionUID = 1L;
+    JPanel xs, aj;
+    JTextField xsArea;
+    JButton[] aJButtons = new JButton[16];
+    String a;
+    int flag = 0;
+    public static void main(String[] args) {
+        Computer t = new Computer();
+    }
+    public Computer() {
+        this.setTitle("计算器");
+        Container c = getContentPane();
+        c.setLayout(new BorderLayout());
+        xs = new JPanel(new FlowLayout());
+        xsArea = new JTextField(20);
+        xsArea.setFont(new Font("宋体", Font.PLAIN, 38));
+        xs.add(xsArea);
+        c.add(xs, BorderLayout.NORTH);
+        aj = new JPanel(new GridLayout(4,4));
+        aJButtons[0]=new JButton("0");
+        aJButtons[1]=new JButton("1");
+        aJButtons[2]=new JButton("2");
+        aJButtons[3]=new JButton("3");
+        aJButtons[4]=new JButton("4");
+        aJButtons[5]=new JButton("5");
+        aJButtons[6]=new JButton("6");
+        aJButtons[7]=new JButton("7");
+        aJButtons[8]=new JButton("8");
+        aJButtons[9]=new JButton("9");
+        aJButtons[10]=new JButton("+");
+        aJButtons[11]=new JButton("-");
+        aJButtons[12]=new JButton("*");
+        aJButtons[13]=new JButton("/");
+        aJButtons[14]=new JButton("=");
+        aJButtons[15]=new JButton(".");
+        aj.add(aJButtons[7]);
+        aj.add(aJButtons[8]);
+        aj.add(aJButtons[9]);
+        aj.add(aJButtons[13]);
+        aj.add(aJButtons[4]);
+        aj.add(aJButtons[5]);
+        aj.add(aJButtons[6]);
+        aj.add(aJButtons[12]);
+        aj.add(aJButtons[1]);
+        aj.add(aJButtons[2]);
+        aj.add(aJButtons[3]);
+        aj.add(aJButtons[11]);
+        aj.add(aJButtons[0]);
+        aj.add(aJButtons[15]);
+        aj.add(aJButtons[10]);
+        aj.add(aJButtons[14]);
+        c.add(aj, BorderLayout.CENTER);
+        setSize(400, 400);
+        setVisible(true);
+        for(int i = 0; i < 10; i++) {
+            final String o = aJButtons[i].getActionCommand();
+            aJButtons[i].addActionListener(new ActionListener() {
+                public void actionPerformed(ActionEvent arg0) {
+                    a = xsArea.getText();
+                    a = a + o;
+                    xsArea.setText(a);
+                }
+            });
+
+        }
+
+        aJButtons[10].addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent arg0) {
+                a = xsArea.getText();
+                a = a + "+";
+                flag = 1;//加法
+                xsArea.setText(a);
+            }
+        });
+
+        aJButtons[11].addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent arg0) {
+                a = xsArea.getText();
+                a = a + "-";
+                flag = 2;//减法
+                xsArea.setText(a);
+            }
+        });
+
+        aJButtons[12].addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent arg0) {
+                a=xsArea.getText();
+                a=a+"*";
+                flag=3;//乘法
+                xsArea.setText(a);
+            }
+        });
+
+        aJButtons[13].addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent arg0) {
+                a=xsArea.getText();
+                a=a+"/";
+                flag=4;//除法
+                xsArea.setText(a);
+            }
+        });
+
+        aJButtons[14].addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent arg0) {
+                a = xsArea.getText();
+                String[] sz = new String[2];
+                sz=a.split("\\+|\\-|\\*|\\/");
+                double b = 0;
+                if(flag == 0) {
+       b = Double.parseDouble(a);
+                }
+
+                else if(flag == 1) {
+                    b = Double.parseDouble(sz[0]) + Double.parseDouble(sz[1]);
+                }
+
+                else if(flag == 2) {
+                    b = Double.parseDouble(sz[0]) - Double.parseDouble(sz[1]);
+                }
+
+                else if(flag == 3) {
+                    b = Double.parseDouble(sz[0]) * Double.parseDouble(sz[1]);
+                }
+
+                else if(flag == 4) {
+                    b = Double.parseDouble(sz[0]) / Double.parseDouble(sz[1]);
+                }
+
+                a = ""+b;
+                xsArea.setText(a);
+            }
+        });
+
+        aJButtons[15].addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent arg0) {
+                a=xsArea.getText();
+                a=a+".";
+                xsArea.setText(a);
+            }
+        });
+
+    }
+
+}

src/Main.java

@@ -0,0 +1,15 @@
+//TIP 要<b>运行</b>代码，请按 <shortcut actionId="Run"/> 或
+// 点击装订区域中的 <icon src="AllIcons.Actions.Execute"/> 图标。
+public class Main {
+    public static void main(String[] args) {
+        //TIP 当文本光标位于高亮显示的文本处时按 <shortcut actionId="ShowIntentionActions"/>
+        // 查看 IntelliJ IDEA 建议如何修正。
+        System.out.printf("Hello and welcome!");
+
+        for (int i = 1; i <= 5; i++) {
+            //TIP 按 <shortcut actionId="Debug"/> 开始调试代码。我们已经设置了一个 <icon src="AllIcons.Debugger.Db_set_breakpoint"/> 断点
+            // 但您始终可以通过按 <shortcut actionId="ToggleLineBreakpoint"/> 添加更多断点。
+            System.out.println("i = " + i);
+        }
+    }
+}