diff --git a/src/java2020spring/Caculator b/src/java2020spring/Caculator
new file mode 100644
index 0000000000000000000000000000000000000000..a7ed5806159c638f346a88ab50f1178f39184232
--- /dev/null
+++ b/src/java2020spring/Caculator
@@ -0,0 +1,221 @@
+package java2020spring;
+
+import java.awt.color.*;
+import java.awt.*;
+import javax.swing.*;
+import java.awt.event.*;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Set;
+public class Caculator extends JFrame{
+	//标签
+	JLabel show= new JLabel();//数值框框
+	JPanel main= new JPanel();//主面板
+	JPanel shuziPanel= new JPanel();//数字面板
+	boolean start;//判断是否重新开始
+	int count;//小数点计数
+	double result;//接受结果
+	String fuhao;//接受符号
+	public static void main(String[] args) {
+		new Caculator();
+		
+	}
+	public Caculator() {
+		init();
+	}
+
+//布局
+	private void init() {
+	//窗体大小
+	this.setSize(350,200);
+	//显示窗体
+	this.setVisible(true);
+	//窗体居中
+	this.setLocationRelativeTo(null);
+	//设置点击退出则关闭程序
+	this.setDefaultCloseOperation(EXIT_ON_CLOSE);
+	//设置标题
+	this.setTitle("Caculator");
+	//显示框默认值为0
+	show.setText("0");
+	//默认开始
+	start=true;
+	//默认小数点次数为0
+	count=0;
+	//结果默认为0
+	result=0;
+	//默认fuhao="="
+	fuhao="=";
+	
+	//按钮设置布局
+	shuziPanel.setLayout(new GridLayout(7,4));
+	//准备监听对象
+	Action1 action1=new Action1();//数字按钮
+	Action2 action2=new Action2();//fuhao按钮
+	Action3 action3=new Action3();//功能按钮
+	//添加按钮
+	this.addButton("TIME",action3);
+	this.addButton("Mess",action3);
+	this.addButton("Backspace",action3);
+	this.addButton("C",action3);
+	this.addButton("7",action1);
+	this.addButton("8",action1);
+	this.addButton("9",action1);
+	this.addButton("+",action2);
+	this.addButton("4",action1);
+	this.addButton("5",action1);
+	this.addButton("6",action1);
+	this.addButton("-",action2);
+	this.addButton("1",action1);
+	this.addButton("2",action1);
+	this.addButton("3",action1);
+	this.addButton("*",action2);
+	this.addButton(".",action1);
+	this.addButton("0",action1);
+	this.addButton("=",action2);
+	this.addButton("/",action2);
+	this.addButton("%",action2);
+	this.addButton("sqrt",action2);
+	this.addButton("M+",action3);
+	this.addButton("1/x",action2);
+	this.addButton("Square",action2);
+	this.addButton("Cube",action2);
+	this.addButton("CubeRoot",action2);
+	this.addButton("|X|",action2);
+	//主面板添加数字按键
+	main.setLayout(new BorderLayout());;
+	main.add(show,"North");//数字面板显示在北方
+	main.add(shuziPanel);//添加数字面板
+	
+	//添加窗体
+	this.add(main);
+	}
+	public void addButton(String shuzi,ActionListener a1 ) {
+		JButton button=new JButton(shuzi);
+		button.addActionListener(a1);
+		shuziPanel.add(button);
+		
+	}
+
+	class Action1 implements ActionListener{
+		
+		public void actionPerformed(ActionEvent e) {
+			String input=e.getActionCommand();//显示按钮的数字
+			if(show.getText().equals("0")) {
+				start=true;}
+			if(start) {
+				count=0;
+				show.setText("");
+				start=false;
+			}
+			if(input.equals(".")) {
+				if(count==0) {
+					show.setText("0"+show.getText()+input);//显示数值
+				}
+				else {
+					show.setText(show.getText()+"");//显示数值
+				}
+				count++;
+			}
+			if(!input.equals(".")) {
+				show.setText(show.getText()+input);
+			}
+			}
+		
+
+	
+	}
+		//fuhao监听方法
+		class Action2 implements ActionListener{
+			public void actionPerformed(ActionEvent e) {
+				String input=e.getActionCommand();
+				if(start) {
+					fuhao=input;}//开始新计算，接受符号
+					else {
+						if(fuhao.equals("+")) {
+							result +=Double.parseDouble(show.getText());
+						}
+						
+						else if(fuhao.equals("CubeRoot")) {
+							result=Math.pow(Double.parseDouble(show.getText()), 1.0/3);
+						}
+						else if(fuhao.equals("|X|")) {
+							if(Double.parseDouble(show.getText())<0) {
+								result=-Double.parseDouble(show.getText());
+							}
+							else {
+								result=Double.parseDouble(show.getText());
+							}
+						}
+						else if(fuhao.equals("Square")) {
+							result =Double.parseDouble(show.getText())*Double.parseDouble(show.getText());
+						}else if(fuhao.equals("Cube")){
+							result =Double.parseDouble(show.getText())*Double.parseDouble(show.getText())*Double.parseDouble(show.getText());
+						}
+						else if(fuhao.equals("-")) {
+							result -=Double.parseDouble(show.getText());
+						}else if(fuhao.equals("*")) {
+							result *=Double.parseDouble(show.getText());
+						}else if(fuhao.equals("/")) {
+							result /=Double.parseDouble(show.getText());
+						}else if(fuhao.equals("%")) {
+							result =Double.parseDouble(show.getText())/100;
+						}else if(fuhao.equals("sqrt")) {
+							result =Math.sqrt(Double.parseDouble(show.getText()));
+						
+						}
+						else if(input.equals("1/x")) {
+							if(Double.parseDouble(show.getText())==0) {
+								show.setText("0无倒数");								
+								}
+							else {
+								result=1/Double.parseDouble(show.getText());
+								
+								}
+						}
+						else {
+							result =Double.parseDouble(show.getText());
+						}
+						show.setText(result+"");
+						fuhao=input;
+						start=true;
+						
+					}
+				}
+			}
+			class Action3 implements ActionListener{
+				public void actionPerformed(ActionEvent e) {
+					String input=e.getActionCommand();
+					if(input.equals("TIME")) {
+						show.setText(new SimpleDateFormat("yyyy-MM-HH:mm:ss").format(new Date()));
+						start=true;
+					}
+					if(input.equals("C")) {
+						//清0
+						show.setText("0");result=0;
+					}
+					if(input.equals("M+")) {
+						show.setText("暂无此功能");
+						start=true;
+					}
+					
+						
+					
+					if(input.equals("Mess")) {
+						show.setText("20信管4周浩特");
+					}
+					if(input.equals("Backspace")) {
+						//后退一步
+						if(show.getText().length()>1) {
+							show.setText(show.getText().substring(0, show.getText().length()-1));
+						}else {
+							show.setText("0");
+						}
+					}
+				}
+			}
+			
+			
+		}
+	
+