diff --git a/src/java2022spring/Calculator.java b/src/java2022spring/Calculator.java
new file mode 100644
index 0000000000000000000000000000000000000000..728f701066a48ed9efbb81ffc97f2b5409f76663
--- /dev/null
+++ b/src/java2022spring/Calculator.java
@@ -0,0 +1,197 @@
+package java2022spring;
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.GridLayout;
+import java.awt.HeadlessException;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+
+
+public class Calculator extends JFrame implements ActionListener {
+
+		
+		private JPanel jp_north=new JPanel();
+		private JTextField resultText=new JTextField("0");
+		
+		
+		private JPanel jp_center=new JPanel();
+		private final String[] temp= {"|x|","sqrt","1/x","x^2","C","BACK","%","/","7","8","9","*","4","5","6","-","1","2","3","+","+/-","0",".","="
+		};
+		private boolean firstDigit=true;
+		private double resultNum=0.0;
+		private String operator="=";
+		private boolean operateValidFlag=true;
+		
+		public Calculator() throws HeadlessException {
+			this.init();
+			this.addNorthComponent();
+			this.addCenterButton();
+		}
+	
+	public void init() {
+		this.setTitle("计算器");
+		this.setSize(300,450);
+		this.setLayout(new BorderLayout());
+		this.setResizable(false);
+		this.setLocation(300,500);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	}
+	
+
+	//添加北面的组件
+	public void addNorthComponent() {
+		this.resultText.setPreferredSize(new Dimension(290,150));
+		jp_north.add(resultText);
+		
+		this.add(jp_north,BorderLayout.NORTH);
+	}
+	
+	
+	//添加中间的组件
+	public void addCenterButton() {
+
+		String[] temp= {"|x|","sqrt","1/x","x^2","C","BACK","%","/","7","8","9","*","4","5","6","-","1","2","3","+","+/-","0",".","="
+		};
+		this.jp_center.setPreferredSize(new Dimension(299,250));
+		this.jp_center.setLayout(new GridLayout(6,4,0,0));
+		JButton [] btn=new JButton[24];
+		for(int i=0;i<temp.length;i++) {
+			
+			btn[i]=new JButton(temp[i]);
+		
+			if(temp[i].equals("+")||temp[i].equals("-")||temp[i].equals("*")||temp[i].equals("/")||temp[i].equals(".")||temp.equals("="
+					)) {
+					btn[i].setFont(new Font("粗体",Font.BOLD,20));
+					btn[i].setForeground(Color.red);
+			}
+			btn[i].addActionListener(this);
+			jp_center.add(btn[i]);
+		}
+		this.add(jp_center,BorderLayout.CENTER);
+	}
+	
+	
+	public void actionPerformed(ActionEvent e) {
+		String click=e.getActionCommand();
+		if(click.equals(temp[4])) {
+			handleC();
+		}
+		else if(click.equals(temp[5])) {
+			handleBack();
+		}
+		else if("0123456789.".indexOf(click)>=0) {
+			handleNumber(click);
+		}
+		else
+			handleOperator(click);
+		}
+	
+	private void handleC()  {
+		resultText.setText("0");
+		firstDigit=true;
+		operator="=";
+	}
+	
+	private void handleBack() {
+		String text=resultText.getText();
+		int i=text.length();
+		if(i>0) {
+			text=text.substring(0,i-1);
+			if(text.length()==0) {
+				resultText.setText("0");
+				firstDigit=true;
+				operator="=";
+			}
+			else
+				resultText.setText(text);
+		}
+		
+	}
+	
+	private void handleNumber(String key) {
+		if(firstDigit) {
+			resultText.setText(key);
+		}
+		else if((key.equals(".")&&(resultText.getText()).indexOf(".")<0)) {
+			resultText.setText(resultText.getText()+".");
+		}
+		else if(!key.equals(".")) {
+			resultText.setText(resultText.getText()+key);
+		}
+		firstDigit=false;
+	}
+	
+	private void handleOperator(String key) {
+		if(operator.equals("/")) {
+			if(getNumberFromText()==0.0) {
+				operateValidFlag=false;
+				resultText.setText("除数不能为零");
+			}
+			else 
+				resultNum/=getNumberFromText();
+		}
+		else if(operator.equals("1/x")) {
+			if(resultNum==0.0) {
+				operateValidFlag=false;
+				resultText.setText("零没有倒数");
+			}
+			else 
+				resultNum=1/resultNum;
+		}
+		else if(operator.equals("+")) {
+			resultNum +=getNumberFromText();
+		}
+		else if(operator.equals("-")) {
+			resultNum -=getNumberFromText();
+		}
+		else if(operator.equals("*")) {
+			resultNum *=getNumberFromText();
+		}
+		else if(operator.equals("|x|")) {
+			resultNum =Math.abs(resultNum);
+		}
+		else if(operator.equals("=")) {
+			resultNum =getNumberFromText();
+		}
+		else if(operator.equals("%")) {
+			resultNum =getNumberFromText()/100;
+		}
+		if(operateValidFlag) {
+			long t1;
+			double t2;
+			t1=(long)resultNum;
+			t2=resultNum-t1;
+			if(t2==0) {
+				resultText.setText(String.valueOf(t1));
+			}
+			else {
+				resultText.setText(String.valueOf(resultNum));
+			}
+		}
+		operator=key;
+		firstDigit=true;
+		operateValidFlag=true;
+			
+	}
+	
+	private double getNumberFromText() {
+		double result=0;
+		try {
+			result=Double.valueOf(resultText.getText()).doubleValue();
+		}
+		catch (NumberFormatException e) {}
+		return result;
+	}
+	public static void main(String[] args) {
+		Calculator calculator=new Calculator();
+		calculator.setVisible(true);
+	}
+}