diff --git a/src/java2022spring/Biaozhun.java b/src/java2022spring/Biaozhun.java
new file mode 100644
index 0000000000000000000000000000000000000000..4be3b6eb803c4ee7cf75a3b982f1f1b7fa258023
--- /dev/null
+++ b/src/java2022spring/Biaozhun.java
@@ -0,0 +1,234 @@
+package java2022spring;
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+public class Biaozhun extends JFrame implements ActionListener{
+	private final String[] KEYS= {"*","/","7","8","9","+","4","5","6","-","1","2","3","1/X",
+			"%","0",".","="
+	};//创建对象KEYS字符串数组
+	private JButton keys[]=new JButton[KEYS.length];	
+	//给KEYS对象创建相应的窗口按钮
+	private final String[]COMMAND= {"Back","C"};
+	//创建对象command数组
+	private JButton commands[]=new JButton[COMMAND.length];
+	//声明command窗口按钮
+	private JTextField textresult =new JTextField("0");
+	//计算的初始值为0
+	private boolean firstDigit=true;
+	//保证可以输入数字
+	private double resultNum=0.0;
+	//初始值为0
+	private String operator="=";
+	//声明操作对象并初始化
+	private boolean operateValidFlag=true;
+	//操作是否合法
+	StringBuffer bz=new StringBuffer();
+	//字符串容量可变 
+	public Biaozhun() {
+		//构造函数，确定标准计算器
+		setTitle("标准计算器");
+		this.setLocation(500,50);
+		this.setSize(600,600);
+		this.setResizable(false);
+		//确定窗口大小，出现的位置和标题
+		JMenuBar menuBar=new JMenuBar();
+		setJMenuBar(menuBar);
+		JMenu menu=new JMenu("切换为科学计算器");
+		//设置菜单栏
+		menuBar.add(menu);
+		menuBar.setBackground(new Color(230,240,250));
+		menu.setForeground(Color.BLUE);
+		menu.setFont(new Font("Courir",Font.ITALIC,20));
+		//修改菜单栏颜色、字体和大小
+		JMenuItem menuItem=new JMenuItem("标准计算器");
+		menu.add(menuItem);
+		JMenuItem menuItem_1=new JMenuItem("科学计算器");
+		menu.add(menuItem_1);
+		//菜单栏设立两个选项
+		menuItem_1.addActionListener(new ActionListener() {
+			   public void actionPerformed(ActionEvent arg0) {
+			    Kexue science = new Kexue();
+			    science.setVisible(true);
+			    }
+			   }
+		);
+		//创建监听器监听Kexue类获得的值
+		textresult.setHorizontalAlignment(JTextField.RIGHT);
+		//使得到的值出现在显示框的右边
+		  textresult.setBackground(new Color(180,200,220));
+		  //调节文本框的背景颜色
+		  textresult.setForeground(Color.blue);
+		  //调节字体颜色
+		  textresult.setFont(new Font("Courir",Font.ITALIC,50));
+		  JPanel PPanel = new JPanel();
+		  //创建一个新的面板
+		  PPanel.setLayout(new GridLayout(5, 4, 3, 3));
+		  for (int i = 0; i < COMMAND.length; i++) {
+		   commands[i] = new JButton(COMMAND[i]);
+		   PPanel.add(commands[i]);
+		   commands[i].setFont(new Font("Courir",Font.ITALIC,25));
+		   commands[i].setBackground(new Color(50,150,250));
+		   //利用new color（int，int，int）进行调色，增加局面美感
+		  }
+		  
+		  for (int i = 0; i < KEYS.length; i++) {
+		   keys[i] = new JButton(KEYS[i]);
+		   PPanel.add(keys[i]);
+		   keys[i].setFont(new Font("Courir",Font.ITALIC,25));
+		   keys[i].setBackground(Color.cyan);
+		  }
+		  //用两个for 循环分别将两个对象数组添加到按钮中
+		  
+		  JPanel panel1 = new JPanel();
+		  panel1.setLayout(new BorderLayout(3,3));
+		  panel1.add("Center", PPanel);
+		 //将创建的面板在窗口上有方向的排放
+		  JPanel top = new JPanel();
+		  top.setLayout(new BorderLayout());
+		  top.add("Center", textresult);
+		  getContentPane().setLayout(new BorderLayout(3,5));
+		  getContentPane().add("North",top);
+		  getContentPane().add("Center",panel1);
+		  for(int i=0;i<KEYS.length;i++) {
+			  keys[i].addActionListener(this);
+			  
+		  }
+		  for(int i=0;i<COMMAND.length;i++) {
+			  commands[i].addActionListener(this);
+		  }
+		//用两个for 循环分别将两个对象数组添加到按钮中
+		}
+		public void actionPerformed(ActionEvent e) 
+		//创建监听器，监听command按钮和keys按钮上面的值
+		{
+			  String label = e.getActionCommand();
+			  if (label.equals(COMMAND[0])) {
+			   handleBack1();
+			  } 
+			  else if (label.equals(COMMAND[1])) {
+			   handleC1();
+			  } 
+			  else if ("0123456789.".indexOf(label) >= 0) {  
+			   handleNumber1(label);
+			   //将监听器获取的值复制到显示屏上面
+			   
+			  } 
+			  else
+			   handleOperator(label);
+			  //否则为操作符
+			 }
+		private void handleBack1()
+		//当监听到back时，将获取的值推后一个数值，利用if语句
+		{
+			  String text = textresult.getText();
+			  int i = text.length();
+			  if (i > 0) {
+			   text = text.substring(0, i - 1);
+			   if (text.length() == 0) {
+			    textresult.setText("0");
+			    firstDigit = true;
+			    operator = "=";
+			   }
+			   else
+			    textresult.setText(text);
+			  }
+			 }
+		//当监听到back时，将获取的值推后一个数值，利用if语句
+			
+			 private void handleC1() 
+			 //当获取的值为C时，将显示屏清零，结果返回初始值
+			 {
+			  textresult.setText("0");
+			  firstDigit = true;
+			  operator = "=";
+			 }
+			 private void handleNumber1(String key) 
+			 //使用监听器获取点击到的数值
+			 {
+			  if (firstDigit) {
+			   textresult.setText(key);
+			  }
+			  else if ((key.equals(".")) && (textresult.getText().indexOf(".") < 0)) {
+			   textresult.setText(textresult.getText() + ".");
+			  }
+			  else if (!key.equals(".")) {
+			   textresult.setText(textresult.getText() + key);
+			  }
+			  //使点击的数值连续出现在显示屏上面
+			  firstDigit = false;
+			 }
+			 //操作符前面的数字删除，显示后面监听到的数值
+			 
+				 private void handleOperator(String key)
+				 //不同操作符下operator的结果及一些特殊条件限制
+				 {
+					  if (operator.equals("/")) {
+					   if (getNumberFromText() == 0.0) {
+					    operateValidFlag = false;
+					    textresult.setText("除数不能为零");
+					   }
+					   else 
+					    resultNum /= getNumberFromText();}
+					   else if(operator.equals("%")) {
+						   resultNum=resultNum*0.01;
+					   }
+					
+					   
+					  else if (operator.equals("+")) {
+					   resultNum += getNumberFromText();
+					  }
+					  else if (operator.equals("-")) {
+					   resultNum -= getNumberFromText();
+					  }
+					  else if (operator.equals("*")) {
+					   resultNum *= getNumberFromText();
+					  }
+					  else if (operator.equals("1/X")) {
+							if (resultNum == 0.0) {
+								operateValidFlag = false;
+								textresult.setText("零没有倒数");
+							}
+							else
+								resultNum = 1 / resultNum;
+							}
+					  else if (operator.equals("=")) {
+					   resultNum = getNumberFromText();
+					  }
+					//不同操作符下operator的结果及一些特殊条件限制
+					  if (operateValidFlag) {
+						  //双精度浮点数运算
+					   long t1;//运算符之前获取的数值
+					   double t2;//运算符之后获取的数值
+					   t1 = (long) resultNum;
+					   t2 = resultNum - t1;
+					   if (t2 == 0) {
+					    textresult.setText(String.valueOf(t1));
+					   }//将值复制到显示屏上面
+					   else {
+					    textresult.setText(String.valueOf(resultNum));
+					   }
+					  }
+					  operator = key;//运算符对于用户按得按钮
+					  firstDigit = true;//确保运算符前面是数字
+					  operateValidFlag = true;//确保操作合理
+					 }
+					 private double getNumberFromText() {
+						 //从文本框获取数字
+						 double result=0;
+						 try {
+							 result=Double.valueOf(textresult.getText()).doubleValue();
+							 }
+						 catch (NumberFormatException e) {}
+	return result;
+	//利用try-catch语句获取result，防止丢异常
+					 }
+				 
+	public static void main(String[] args) {
+		Biaozhun application=new Biaozhun();//声明标准计算器
+		application.setVisible(true);//窗口可见
+		application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	// TODO 自动生成的方法存根
+
+	}
+
+}
diff --git a/src/java2022spring/Kexue.java b/src/java2022spring/Kexue.java
new file mode 100644
index 0000000000000000000000000000000000000000..7086fee022cdf0f86b33c76e75b87c11d09ba2f9
--- /dev/null
+++ b/src/java2022spring/Kexue.java
@@ -0,0 +1,310 @@
+package java2022spring;
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+@SuppressWarnings("serial")
+public class Kexue extends JFrame implements ActionListener {
+	private final String[] KEYS = { "*","/","7","8","9","+","4","5","6","-","1","2","3","1/X",
+			"%","0",".","="  };
+	private final String[] COMMAND = { "Back", "C" };
+	private JButton keys[] = new JButton[KEYS.length];
+	private JButton commands[] = new JButton[COMMAND.length];
+	//与标准计算器一样的按键，创建过程一致
+	private JTextField resultText = new JTextField("0");
+//初始值结果
+	private boolean firstDigit = true;
+	//保证可以输入数字
+	private double resultNum = 0.0;
+	private String operator = "=";
+	//声明操作符为=
+	private boolean operateValidFlag = true;
+	//操作是否合法
+	private final String[] KEYS2= {"X^2","X^3","X^Y","Sqrt","rad","X!","ln","lg","|X|","sin","cos","tan","PI","e","e^X"};
+	//创建含有科学计算符合的字符串数组
+	private JButton keys2[]=new JButton[KEYS2.length];
+	StringBuffer kx = new StringBuffer();
+	//使创建的数组容量可以改变
+	private JPanel contentPane,contentpane2;
+	//创建两个控制面板
+
+	private FlowLayout layout;
+	//确定科学计算器布局
+	public Kexue()
+	{
+		super("科学计算器");
+		//创建科学计算器构造函数
+		this.setTitle("科学计算器");
+		this.setSize(800, 500);
+		//确定窗口大小和标题
+		JMenuBar menuBar = new JMenuBar();
+		//设置菜单栏
+		setJMenuBar(menuBar);
+		JMenu menu = new JMenu("切换为标准计算器");
+		menuBar.add(menu);
+		menuBar.setBackground(new Color(250,240,230));
+		menu.setForeground(Color.RED);
+		menu.setFont(new Font("Courir",Font.ITALIC,20));
+		//修改菜单栏颜色字体及大小
+		JMenuItem menuItem = new JMenuItem("标准计算器");
+		menu.add(menuItem);
+		JMenuItem menuItem_1 = new JMenuItem("科学计算器");
+		menu.add(menuItem_1);
+		//设置标准和科学两个选项
+		menuItem.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				Biaozhun ordinary = new Biaozhun();
+				ordinary.setVisible(true);
+				}
+			}
+		);
+		//创建监听器监听标准计算器获取的值
+		
+		resultText.setHorizontalAlignment(JTextField.RIGHT);
+		//输入的结果出现在显示屏的右边
+		resultText.setBackground(new Color(250,240,240));
+		resultText.setForeground(Color.red);
+		resultText.setFont(new Font("Courir",Font.ITALIC,50));
+		//显示屏的背景颜色及文本的颜色和字体格式，大小
+		JPanel PPanel=new JPanel();//创建新的面板
+		PPanel.setLayout(new GridLayout(5, 4, 3, 3));//确定按钮布局
+		for (int i = 0; i < COMMAND.length; i++) {
+			commands[i] = new JButton(COMMAND[i]);
+			PPanel.add(commands[i]);
+			commands[i].setFont(new Font("Courir",Font.ITALIC,25));
+			 commands[i].setBackground(new Color(230,150,150));
+		}
+		for (int i = 0; i < KEYS.length; i++) {
+			keys[i] = new JButton(KEYS[i]);
+			PPanel.add(keys[i]);
+			keys[i].setFont(new Font("Courir",Font.ITALIC,25));
+			keys[i].setBackground(new Color(250,200,200));
+		}
+		//用for循环语句将数组内容复制到按钮上
+				JPanel panel1 = new JPanel();
+				//初始化功能键，将功能键放在一个面板上
+				panel1.setLayout(new BorderLayout(3,3));
+				panel1.add("Center", PPanel);
+				JPanel top = new JPanel();
+				top.setLayout(new BorderLayout());
+				top.add("Center", resultText);
+				contentPane=new JPanel();
+				contentPane.setLayout(new BorderLayout(3, 5));
+				contentPane.add("North", top);
+				contentPane.add("Center", panel1);
+				//创建新的面板作为显示框，布局在最上方
+				JPanel ppanel=new JPanel();
+				ppanel.setLayout(new GridLayout(5, 3, 3, 3));
+				for (int i = 0; i < KEYS2.length; i++) {
+					keys2[i] = new JButton(KEYS2[i]);
+					ppanel.add(keys2[i]);
+					keys2[i].setFont(new Font("Courir",Font.ITALIC,25));
+					keys2[i].setBackground(new Color(250,220,240));
+				}
+				//确定字符串数组keys中字符串的字体大小和按钮背景颜色
+				contentpane2 = new JPanel();
+				contentpane2.setLayout(new BorderLayout(3, 5));
+				//构造新边框布局
+				contentpane2.add("Center", ppanel);
+				layout=new FlowLayout();
+				JPanel ane= new JPanel();
+				ane.setLayout(layout);
+				getContentPane().setLayout(new BorderLayout(3,5));
+				getContentPane().add("Center", contentPane);
+				getContentPane().add("East", contentpane2);
+		//将创建的面板进行布局
+				for (int i = 0; i < KEYS.length; i++) {
+					keys[i].addActionListener(this);
+				}
+				for (int i = 0; i < COMMAND.length; i++) {
+					commands[i].addActionListener(this);
+				}
+				for (int i = 0; i < KEYS2.length; i++)
+					keys2[i].addActionListener(this);
+				setVisible(true);
+			}
+		//创建监听器监听窗口上面所有按钮的获取的数值
+				public void actionPerformed(ActionEvent e)
+				//创建监听器，监听command按钮和keys按钮上面的值
+				{
+					String label = e.getActionCommand();
+					if (label.equals(COMMAND[0])) {
+						handleBack();
+					} 
+					//用户按了Back键
+					else if (label.equals(COMMAND[1])) {
+						handleC();
+					} 
+					//用户按了C键
+					else if ("0123456789.".indexOf(label) >= 0) {
+						handleNumber(label);
+					}
+					//用户按了数字键
+					else if(label.equals("PI"))
+						resultText.setText(String.valueOf(3.14159265));
+					else if(label.equals("e"))
+						resultText.setText(String.valueOf(2.17828));
+					else
+						handleOperator(label);
+				}
+				
+				//将监听器获取的值复制到显示屏上面
+				private void handleBack()
+				//当监听到back时，将获取的值推后一个数值，利用if语句
+				{
+					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) {
+						//如果第一个输入为数字
+						resultText.setText(key);
+					}
+					else if ((key.equals(".")) && (resultText.getText().indexOf(".") < 0)) {
+						resultText.setText(resultText.getText() + ".");
+					}
+					else if (!key.equals(".")) {
+						resultText.setText(resultText.getText() + key);
+					}//使点击的数值连续出现在显示屏上面
+					firstDigit = false;
+				}//操作符前面的数字删除，显示后面监听到的数值	  
+				private void handleC() {
+					resultText.setText("0");
+					firstDigit = true;
+					operator = "=";
+				} //当获取的值为C时，将显示屏清零，结果返回初始值
+				
+				private void handleOperator(String key)
+				 //不同操作符下operator的结果及一些特殊条件限制
+				{
+					if (operator.equals("/")) {
+						if (getNumberFromText() == 0.0) {
+							operateValidFlag = false;
+							resultText.setText("除数不能为零");
+						}
+						else 
+							resultNum /= getNumberFromText();
+					
+						}
+					else if (operator.equals("+")) {
+						resultNum += getNumberFromText();
+					}
+					else if (operator.equals("-")) {
+						resultNum -= getNumberFromText();
+					}
+					else if (operator.equals("*")) {
+						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("X^2")) {
+						resultNum = resultNum*resultNum;
+					}
+					else if (operator.equals("X^3")) {
+						resultNum = resultNum*resultNum*resultNum;
+					}
+					else if (operator.equals("X^Y")) {
+						resultNum = Math.pow(resultNum,getNumberFromText());
+					}
+					else if (operator.equals("Sqrt")) {
+						resultNum = Math.sqrt(resultNum);
+					}
+					else if (operator.equals("rad")) {
+						resultNum = resultNum*57.3;
+					}
+					else if (operator.equals("X!")) {
+						int ee;
+						double re=resultNum ;
+						int c=1;
+						for(ee=1;ee<=re;ee++)
+						{
+							c=c*ee;
+							resultNum=c;}
+					}
+					else if (operator.equals("ln")) {
+						resultNum = Math.log(resultNum);
+					}
+					else if (operator.equals("lg")) {
+						resultNum = Math.log10(resultNum);
+					}
+					else if (operator.equals("|x|")) {
+						resultNum = Math.abs(resultNum);
+					}else if (operator.equals("sin")) {
+						resultNum = Math.sin(resultNum);
+					}
+					else if (operator.equals("cos")) {
+						resultNum = Math.cos(resultNum);
+					}
+					else if (operator.equals("tan")) {
+						resultNum = Math.tan(resultNum);
+					}
+					else if (operator.equals("e^X")) {
+						resultNum = Math.exp(resultNum);
+					}
+					else if (operator.equals("=")) {
+						resultNum = getNumberFromText();
+					}
+					if (operateValidFlag) 
+					//判断操作是否规范
+						{
+						long t1;
+						double t2;
+						t1 = (long) resultNum;
+						t2 = resultNum - t1;
+						if (t2 == 0) {
+							resultText.setText(String.valueOf(t1));
+						}
+						else {
+							resultText.setText(String.valueOf(resultNum));
+							//显示新的文本
+						}
+					}
+					operator = key;//运算符对于用户点击的按钮
+					firstDigit = true;//第一个输入为数字
+					operateValidFlag = true;//操作合法
+				}
+				//可以输入数值，操作规范
+
+				private double getNumberFromText() {
+					//从运算符获取结果
+					double result = 0;
+					try {
+						result = Double.valueOf(resultText.getText()).doubleValue();
+					} catch (NumberFormatException e) {}
+					return result;
+				}
+				//利用try-catch语句获取result
+				public static void main(String args[]) {
+					EventQueue.invokeLater(new Runnable() {
+						//eventqueue.invokelater()可以使方法调用完毕后被销毁，释放节省内存空间
+						public void run() {
+							try {
+								//防止丢异常
+								Kexue application = new Kexue();//内部类创建科学计算器对象
+								application.setVisible(true);
+								
+								} catch (Exception e) {
+									e.printStackTrace();
+									}
+							}
+						}
+					);
+				}
+				
+		}
\ No newline at end of file