diff --git a/src/java2022spring/Calculator.java b/src/java2022spring/Calculator.java
new file mode 100644
index 0000000000000000000000000000000000000000..b7796cc7a51655686ba2b431d4060ec64736ac13
--- /dev/null
+++ b/src/java2022spring/Calculator.java
@@ -0,0 +1,281 @@
+package java2022spring;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.text.DecimalFormat;
+import java.math.BigInteger;
+import java.math.BigDecimal;
+
+
+public class Calculator extends JFrame implements ActionListener{
+	private JPanel cal_north =new JPanel();//北面布局
+	private JPanel cal_center =new JPanel();//中间布局
+	private JPanel cal_south =new JPanel();//南面布局
+	private JTextField cal_input =new JTextField("0");//输入框（中
+	private JTextField cal_process =new JTextField();//过程框（北	
+	private JMenuBar Menu=new JMenuBar();
+	public Calculator() throws HeadlessException {
+		this.win();
+		this.win_NORTH();
+		this.win_CENTER();
+		this.win_Button();
+		this.menu();
+		
+	}
+	
+	//创建菜单
+	public void menu(){
+		JMenu btn1=new JMenu("查看");
+		JMenu btn2=new JMenu("编辑");
+		JMenu btn3=new JMenu("帮助");
+		JMenu btn4=new JMenu("更多");
+		JMenu btn5=new JMenu("历史");
+		Menu.add(btn1);
+		Menu.add(btn2);
+		Menu.add(btn3);
+		Menu.add(btn4);
+		Menu.add(btn5);
+		Menu.setBackground(Color.LIGHT_GRAY);
+		Menu.setBorder(BorderFactory.createMatteBorder(0, 3, 0, 3, Color.LIGHT_GRAY));
+		this.setJMenuBar(Menu);
+	}
+	
+	//创建窗体	
+	public void win() {
+		this.setTitle("计算器");
+		this.setSize(300,450);
+		this.setBackground(Color.LIGHT_GRAY);
+		this.setLayout(new BorderLayout());
+		this.setResizable(false);//不可拉伸
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLocationRelativeTo(null);//使窗体居中
+		this.cal_input.setHorizontalAlignment(JTextField.RIGHT);//输入内容右对齐
+		this.cal_process.setHorizontalAlignment(JTextField.RIGHT);//输入内容右对齐
+	}
+	
+	//添加输入框
+	public void win_CENTER() {
+		cal_center.setLayout(new BorderLayout());
+		cal_center.add(cal_input);//把输入框加入中间布局
+		cal_center.setSize(280, 50);
+		this.add(cal_center,BorderLayout.CENTER);
+		cal_input.setBackground(Color.LIGHT_GRAY);
+		cal_input.setFont(new Font("黑体",Font.BOLD,50));
+		cal_input.setBorder(null); //删除输入框的边框
+		cal_input.setEditable(false);  //不能修改结果文本框
+		cal_center.setBorder(BorderFactory.createMatteBorder(5, 3, 0, 3, Color.LIGHT_GRAY));
+	}
+	
+	public void win_NORTH() {
+		cal_north.setLayout(new BorderLayout());
+		cal_north.add(cal_process);//把过程框加入北面布局
+		Dimension process_size=new Dimension(280,30);//设置过程框大小
+		cal_process.setPreferredSize(process_size);//将大小应用至输入框
+		this.add(cal_north,BorderLayout.NORTH);
+		cal_process.setBackground(Color.LIGHT_GRAY);
+		cal_process.setFont(new Font("黑体",Font.BOLD,30));
+		cal_process.setBorder(null); //删除输入框的边框
+		cal_process.setEditable(false);  //不能修改结果文本框
+		cal_north.setBorder(BorderFactory.createMatteBorder(5, 3, 5, 3, Color.LIGHT_GRAY));
+	}
+
+	//添加按钮
+	public void win_Button() {
+		String [] Btns= {"%","CE","C","←","n!","e^x","cos","sin","1/x","x^2","√x","÷","7","8","9","×","4","5","6","-","1","2","3","+","±","0",".","="};
+		String num="[1234567890]";
+		String sigh="[\\+\\-\\×\\÷]";
+		String reset="[C←]";
+		this.cal_south.setBackground(Color.LIGHT_GRAY);
+		this.cal_south.setLayout(new GridLayout(7,4,4,4));//设置按键个数及大小
+		cal_south.setBorder(BorderFactory.createMatteBorder(0, 4, 5, 4, Color.LIGHT_GRAY));
+		for(int i=0;i<28;i++) {
+			JButton btn=new JButton();
+			btn.setText(Btns[i]);
+			btn.setBackground(new Color(232, 232, 232));
+			btn.setFont(new Font("楷体",Font.BOLD,15));
+			btn.setBorderPainted(false); 
+			if(Btns[i].matches(num)) {
+				btn.setBackground(new Color(245,245,245));
+				btn.setFont(new Font("黑体",Font.BOLD,20));//把数字加粗放大
+			}
+			if(Btns[i]=="±"||Btns[i]==".") {
+				btn.setBackground(new Color(245,245,245));
+			}
+			else if(Btns[i].matches(sigh)) {
+				btn.setBackground(Color.GRAY);
+				btn.setForeground(Color.white);
+			}
+			else if(Btns[i].matches(reset)) {
+				btn.setBackground(Color.ORANGE);
+				btn.setForeground(Color.WHITE);
+			}
+			else if(Btns[i]=="=") {
+				btn.setBackground(Color.BLACK);
+				btn.setForeground(Color.WHITE);
+			}
+			btn.addActionListener(this);
+			cal_south.add(btn);
+		}		
+		this.add(cal_south,BorderLayout.SOUTH);
+	}
+	
+	public static void main(String[] args) {
+		Calculator calculator=new Calculator();
+		calculator.setVisible(true);
+	}
+	
+	//为按键添加功能
+	private String firstInput=null;//中间过程
+	private String operation=null;//运算符
+	private boolean judge= true;//判断
+	private double result = 0; 
+	private String result_string=null; 
+	@Override
+	public void actionPerformed(ActionEvent e) {
+		String input=e.getActionCommand();
+		String store=cal_input.getText();
+		
+		//处理数字
+		if("0123456789".indexOf(input)!=-1) {
+			if(judge) {
+				cal_input.setText(null);
+				cal_input.setText(input);
+			}
+			else {
+			this.cal_input.setText(store+input);//可从左至右输入数据
+		}
+			judge=false;
+		}
+		
+		//处理.
+		else if((input.equals("."))&&(store.indexOf(".")==-1)) {
+			cal_input.setText(store+ ".");			
+		}
+		
+		
+		//处理CE、C、←
+		else if(input.equals("CE")) {
+			cal_input.setText("0");
+			judge=true;
+		}
+		else if(input.equals("C")) {
+			cal_input.setText("0");
+			cal_process.setText(null);
+			judge=true;
+		}
+		else if(input.equals("←")) {
+			if(store.length()>0) {
+				store=store.substring(0,store.length()-1);
+				if (store.length() == 0) {
+		                cal_input.setText("0");
+		                judge=true;
+		            } 
+				 else {					 
+					 cal_input.setText(store);
+				 	}
+				}
+		}
+		
+		//处理%、±、n!,e^x，cos,sin,1/x,x^2,√x
+		else if(input.equals("%")||input.equals("±")||input.equals("n!")||input.equals("e^x")||input.equals("cos")||input.equals("sin")||input.equals("1/x")||input.equals("x^2")||input.equals("√x")){
+			result=(Double.valueOf(cal_input.getText()).doubleValue());
+			cal_input.setFont(new Font("黑体",Font.BOLD,25));
+			if(input.equals("%")){
+				result=result*0.01;			
+			}
+			else if(input.equals("±")){
+				result=result*(-1);			
+			}
+			else if(input.equals("n!")) {
+				int factorial=1;
+				for (int i=1;i<=result; i++) {
+	                factorial=factorial*i;
+	            }
+	            result=factorial;
+	            cal_process.setText(store+"!"+"=");
+			}
+			else if(input.equals("e^x")) {
+				result=Math.pow(Math.E, result);
+				 cal_process.setText("e^"+store+"=");
+			}
+			else if(input.equals("cos")) {
+				result=Math.cos(result);
+				cal_process.setText("cos"+store+"=");
+			}
+			else if(input.equals("sin")) {
+				result=Math.sin(result);
+				cal_process.setText("sin"+store+"=");
+			}
+			else if(input.equals("x^2")) {
+				result=result*result;
+				cal_process.setText(store+"^2=");
+			}
+			else if(input.equals("√x")) {
+				result=Math.sqrt(result);
+				cal_process.setText("√"+store+"=");
+			}
+			else if(input.equals("1/x")) {
+				if (result==0) {
+		            cal_input.setText("除数不能为零");
+		        } 
+				else {
+		           result= 1/result;
+		           cal_process.setText("1/("+cal_input.getText()+")=");
+		            }
+			}	
+			if((input.equals("1/x"))&&(result==0)) {
+				cal_input.setText("除数不能为零");
+			}
+			else {
+			result_string=Double.toString(result);
+			cal_input.setText(result_string);	
+			}
+			judge=true;
+		}
+
+		//处理+-×÷
+		else if(input.matches("[\\+\\-\\×\\÷]{1}")){ //{1}是其中一个的意思
+			operation=input;
+			firstInput=this.cal_input.getText();
+			this.cal_input.setText("");
+			if (input.matches("[\\+\\-\\×\\÷]{1}")){
+			    cal_process.setText(store+input);
+				}
+		}
+		else if (input.equals("=")) {
+			double a=Double.valueOf(firstInput);
+			double b=Double.valueOf(this.cal_input.getText());			
+			switch(operation) {
+				case"+":
+					result=a+b;
+					break;
+				case"-":
+					result=a-b;
+					break;
+				case"×":
+					result=a*b;
+					break;
+				case"÷":
+					if(b!=0)
+					result=a/b;					
+					break;				
+			}
+			cal_process.setText(firstInput+operation+this.cal_input.getText()+"=");
+			if((operation=="÷")&&(b==0)) {
+				cal_input.setText("除数不能为0");
+				judge=true;			
+		}
+			else {
+				result_string=Double.toString(result);
+				cal_input.setText(result_string);
+				judge=true;
+			}
+		
+	}
+}
+	
+}
+
+