diff --git a/src/java2022spring/Panel.java b/src/java2022spring/Panel.java
new file mode 100644
index 0000000000000000000000000000000000000000..2cf61b2f75d40a80e968a8de38874a94be2ab2e3
--- /dev/null
+++ b/src/java2022spring/Panel.java
@@ -0,0 +1,177 @@
+package java2022spring;
+
+import java.awt.event.*;
+import java.math.BigDecimal;
+import java.util.InputMismatchException;
+import java.util.StringTokenizer;
+import javax.swing.*;
+import java.awt.*;
+
+public class Panel extends JFrame{
+	JFrame frame=new JFrame("计算器");
+	JPanel p1=new JPanel();
+	JPanel p2=new JPanel();
+	JButton button[][]=new JButton[5][4];
+	JTextField textone=new JTextField(40);
+	boolean isNum;
+	Panel() {
+		p1.add(textone);
+		p2.setLayout(new java.awt.GridLayout(5,4,4,4)); 
+		frame.setResizable(false);
+		frame.setSize(400,350);
+		frame.setLocationRelativeTo(null);
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.add(p1,BorderLayout.NORTH);
+		frame.add(p2,BorderLayout.CENTER);
+		frame.setVisible(true);
+    String [][] s={ {"AC","sqrt","^2","/"},
+    				{"7","8","9","*"},
+    				{"4","5","6","-"},
+    				{"1","2","3","+"},
+    				{".","0","=","%"}};
+    for(int i=0;i<5;i++){  
+    	for(int j=0;j<4;j++){
+    		button[i][j]=new JButton(s[i][j]);
+    		button[i][j].setFont(new Font ("宋体",Font.BOLD,25));
+    		p2.add(button[i][j]);
+        }
+     }
+    listener jt=new listener();
+    button[4][1].addActionListener(jt);
+    for(int i=1;i<4;i++){
+    	for(int j=0;j<3;j++){
+    		button[i][j].addActionListener(jt); 
+    	}
+    }
+    
+    listener_AC jt_AC=new listener_AC();
+	button[0][0].addActionListener(jt_AC);
+    MyEvent();
+	
+	}
+    class listener  implements ActionListener{
+		
+		
+		@Override
+		public void actionPerformed(ActionEvent e) {
+			// TODO 自动生成的方法存根
+			String t=e.getActionCommand();
+			String s=textone.getText();
+			if(isNum==false) 
+				textone.setText(t);
+			else
+				textone.setText(s+t);
+			isNum=true;
+		}
+	}
+
+	class listener_AC  implements ActionListener{
+
+		@Override
+		public void actionPerformed(ActionEvent e) {
+			// TODO 自动生成的方法存根
+			textone.setText("");
+		}
+	}
+	public void MyEvent(){
+	  
+	  Text(button[0][1]);
+	  Text(button[0][2]);
+	  Text(button[4][2]);
+	  Text(button[0][3]);
+	  Text(button[1][3]);
+	  Text(button[2][3]);
+	  Text(button[3][3]);
+	  Text(button[4][3]);
+	  Text(button[4][0]);
+	  
+	button[4][2].addActionListener (new ActionListener(){
+			@Override
+		public void actionPerformed(ActionEvent e) {
+				// TODO 自动生成的方法存根
+			textone.setText(textone.getText()+button[4][2].getText());
+			double x,y=0;
+			if(textone.getText().contains("+")) {
+				StringTokenizer str1=new StringTokenizer(textone.getText(),"+");//str1为textone的输入，以+来分割字符串 
+				x=Double.parseDouble(str1.nextToken());     //x为输入的第一个数
+				while(str1.hasMoreTokens()) {               //如果第一个数后面还有输入
+					StringTokenizer str2=new StringTokenizer(str1.nextToken(),"=");//str2为textone除符号外的第二个输入
+					y=Double.parseDouble(str2.nextToken());  //y为输入的第二个数
+				}
+				textone.setText(textone.getText()+" "+(x+y));        //加法时的运算结果
+			}
+			else if(textone.getText().contains("-")) {
+				StringTokenizer str1=new StringTokenizer(textone.getText(),"-");
+				x=Double.parseDouble(str1.nextToken()); 
+				while(str1.hasMoreTokens()) {               
+					StringTokenizer str2=new StringTokenizer(str1.nextToken(),"=");
+					y=Double.parseDouble(str2.nextToken());         
+				}
+				textone.setText(textone.getText()+" "+(x-y));  
+			}
+			else if(textone.getText().contains("*")) {
+				StringTokenizer str1=new StringTokenizer(textone.getText(),"*");
+				x=Double.parseDouble(str1.nextToken()); 
+				while(str1.hasMoreTokens()) {               
+					StringTokenizer str2=new StringTokenizer(str1.nextToken(),"=");
+					y=Double.parseDouble(str2.nextToken());         
+				}
+				textone.setText(textone.getText()+" "+(x*y));  
+			}
+			else if(textone.getText().contains("/")) {
+				StringTokenizer str1=new StringTokenizer(textone.getText(),"/");
+				x=Double.parseDouble(str1.nextToken());
+				while(str1.hasMoreTokens()) {               
+					StringTokenizer str2=new StringTokenizer(str1.nextToken(),"=");
+					y=Double.parseDouble(str2.nextToken());
+				}
+				if(y==0.0)
+					textone.setText("表达式错误");
+				else
+				  textone.setText(textone.getText()+" "+(x/y));  
+			}
+			else if(textone.getText().contains("sqrt")) {
+				StringTokenizer str1=new StringTokenizer(textone.getText(),"sqrt");
+				x=Double.parseDouble(str1.nextToken()); 
+				textone.setText(textone.getText()+" "+(Math.sqrt(x)));  
+			}
+			else if(textone.getText().contains("%")) {
+				StringTokenizer str1=new StringTokenizer(textone.getText(),"%");
+				x=Double.parseDouble(str1.nextToken()); 
+				while(str1.hasMoreTokens()) {               
+					StringTokenizer str2=new StringTokenizer(str1.nextToken(),"=");
+					y=Double.parseDouble(str2.nextToken()); 
+					}
+				if(y==0.0)
+					textone.setText("表达式错误");
+				else
+				  textone.setText(textone.getText()+" "+(x%y));
+				
+			}
+			else if(textone.getText().contains("^2")) {
+				StringTokenizer str1=new StringTokenizer(textone.getText(),"^2");
+				x=Double.parseDouble(str1.nextToken()); 
+				textone.setText(textone.getText()+" "+(x*x));  
+			}
+		}
+	});
+	}
+	
+	public void Text(JButton button){
+		  button.addActionListener(new ActionListener(){
+		 
+		   @Override
+		   public void actionPerformed(ActionEvent arg) { 
+		    // TODO Auto-generated method stub
+
+		    String str = button.getText();
+
+		    textone.setText(textone.getText()+str);
+		   }		   
+		 });
+	}
+	
+	public static void main(String[] args) {
+		new Panel();
+	}
+ }
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