diff --git a/src/java2020spring/ComputerFrame.java b/src/java2020spring/ComputerFrame.java
new file mode 100644
index 0000000000000000000000000000000000000000..50e609de64ff14dbe9060b6a715e0a60405b8728
--- /dev/null
+++ b/src/java2020spring/ComputerFrame.java
@@ -0,0 +1,242 @@
+package java2020spring;
+
+
+
+import java.awt.BorderLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.*;
+import java.awt.*;
+
+import javax.swing.*;
+import java.util.ArrayList;
+import java.util.List;
+public class ComputerFrame extends JFrame implements ActionListener{
+	
+	 //菜单
+	JMenuBar menubar;
+	JMenu menu1,menu2;
+	JMenuItem menuItem;
+	//菜单中的单选框：标准型，科学型
+	JRadioButton radioSt,radioSc;
+	//菜单中的单选框:度数
+	JRadioButton 弧度转角度,角度转弧度;
+	//菜单中的单选框:多少进制
+		JRadioButton R16,R10,R8,R2;
+	//分组
+	ButtonGroup group1,group2,group3;
+	//菜单中的复选框:数字分组
+	JCheckBox checkbox;
+	
+void MenuBar() {
+	//只加了一行菜单
+	menubar=new JMenuBar();
+	menu1=new JMenu("编辑");
+	menu2=new JMenu("查看");
+	menuItem=new JMenuItem("帮助");
+	menuItem.addActionListener(this);
+	menu1.add(menuItem);
+	
+	//菜单中的单选框：标准型，科学型
+	group1=new ButtonGroup();
+	radioSt=new JRadioButton("标准型");
+	
+	
+	group1.add(radioSt);
+	
+	menu2.add(radioSt);
+	
+	//菜单中的单选框:多少进制
+	group2=new ButtonGroup();
+	R16=new JRadioButton("十进制转十六进制");
+	R10=new JRadioButton("十进制转十进制");
+	R8=new JRadioButton("十进制转八进制");
+	R8.addActionListener(this);
+	R2=new JRadioButton("十进制转二进制");
+	R2.addActionListener(this);
+	
+	group2.add(R16);
+	group2.add(R10);
+	group2.add(R8);
+	group2.add(R2);
+	menu2.add(R16);
+	menu2.add(R10);
+	menu2.add(R8);
+	menu2.add(R2);
+	//菜单中的单选框:度数
+	group3=new ButtonGroup();
+		弧度转角度=new JRadioButton("弧度转角度");
+		角度转弧度=new JRadioButton("角度转弧度");
+		
+		弧度转角度.addActionListener(this);
+		角度转弧度.addActionListener(this);
+		group3.add(弧度转角度);
+		group3.add(角度转弧度);
+		
+		menu2.add(弧度转角度);
+		menu2.add(角度转弧度);
+		
+	//菜单中的复选框:数字分组
+	checkbox=new JCheckBox("数字分组");
+	menu2.add(checkbox);
+	//只加了一行菜单
+	menubar.add(menu1);
+	menubar.add(menu2);
+	
+	setJMenuBar(menubar);
+}
+	 JTextField text=null;
+	 JButton button=null;
+	 Box Nbox;
+	
+	String nameComputer[]= {"%","√","x²","1/x","CE","C","back","/","7","8","9","*","4","5","6","-","1","2","3","+","+/-","0",".","="};
+	String M[]= {"MC","MR","MS","M+","M-"};
+	ComputerOperation operation=new ComputerOperation();
+	
+	ComputerFrame(){
+		//底层
+		JPanel panel=new JPanel();
+		panel.setLayout(new BorderLayout());
+		
+		//NORTH	
+		JPanel panel1=new JPanel();
+		panel1.setLayout(new GridLayout(1,5,2,10));
+		setMButton(panel1);
+		Nbox=Box.createVerticalBox();
+		 
+		Nbox.add(getTextField());
+		
+		Box.createVerticalStrut(10);
+		Nbox.add(panel1);
+		panel.add(Nbox,BorderLayout.NORTH);
+		
+		//CENTER
+		JPanel panel2=new JPanel();
+		panel2.setLayout(new GridLayout(6,4,3,3));
+		setAllButton(panel2);
+		panel.add(panel2,BorderLayout.CENTER);
+		panel1.setPreferredSize(new Dimension(400, 60));
+		
+		
+		this.add(panel);
+		this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+		this.setVisible(true);
+	}
+	//剩余键
+	private void setAllButton(JPanel panel2) {
+		JButton[] aButton=new JButton[nameComputer.length];
+		
+		for(int i=0;i<nameComputer.length;i++) {
+			JButton a=new JButton(nameComputer[i]);
+			a.addActionListener(this);
+			//
+			aButton[i]=a;
+			panel2.add(aButton[i]);
+		
+	}
+   }
+	//M键
+	void setMButton(JPanel panel1) {
+		JButton[] mButton=new JButton[M.length];
+		
+		for(int i=0;i<M.length;i++) {
+			JButton b=new JButton(M[i]);
+			b.addActionListener(this);
+			//
+			mButton[i]=b;
+			panel1.add(mButton[i]);
+		}
+		
+		
+	}
+//文本框
+	 JTextField getTextField() {
+		text = new JTextField("0",1000);
+		text.setPreferredSize(new Dimension (50,50));
+		
+		return text;
+	}
+
+	@Override
+	public void actionPerformed(ActionEvent e) {//监视按键得到
+		String cmd=e.getActionCommand();//按键叫什么
+		String result = null;//返回显示在文本框上
+		try {
+			result=operation.calculate(cmd,text.getText());//传递按键名字和文本框中的显示，先解决数字显示问题，数字能变文本框，再得到文本计算,最后都能返回
+		}
+		catch(Exception e1) {
+			System.out.println(e1.getMessage());
+		}
+		if(result != null){
+			text.setText(result);//返回显示在文本框上
+		}
+		try {
+		if(e.getSource()==R2) {//只能将10进制转为二进制，以后再修改
+			if(text.getText().indexOf(".")==-1) {
+				
+				int b2=Integer.parseInt(text.getText());
+			  int a2;
+			  String sum="0";
+			  List<Integer> list=new ArrayList<Integer>();
+			  while(b2!=0){
+			   a2=b2%2;
+			   list.add(a2);
+			   b2=b2/2;
+			  }
+			  for(int j=list.size()-1;j>=0;j--){
+			   sum=sum+list.get(j)+"";
+			  }
+			  text.setText(sum);
+			}
+		}		
+		if(e.getSource()==R8) {
+			if(text.getText().indexOf(".")==-1) {//只能将10进制转为八进制，以后再修改
+				
+				int b2=Integer.parseInt(text.getText());
+			  int a2;
+			  String sum="0";
+			  List<Integer> list=new ArrayList<Integer>();
+			  while(b2!=0){
+			   a2=b2%8;
+			   list.add(a2);
+			   b2=b2/8;
+			  }
+			  for(int j=list.size()-1;j>=0;j--){
+			   sum=sum+list.get(j)+"";
+			  }
+			  text.setText(sum);
+			}
+		}
+		if(e.getSource()==R16) {//只能将10进制转为十六进制，以后再修改
+			if(text.getText().indexOf(".")==-1) {				
+			  int b2=Integer.parseInt(text.getText());
+			  int a2;
+			  String sum="0";
+			  List<Integer> list=new ArrayList<Integer>();
+			  while(b2!=0){
+			   a2=b2%16;
+			   list.add(a2);
+			   b2=b2/16;
+			  }
+			  for(int j=list.size()-1;j>=0;j--){
+			   sum=sum+list.get(j)+"";
+			  }
+			  text.setText(sum);
+			}
+		}
+		if(e.getSource()==弧度转角度) {//只能将弧度转为角度
+			text.setText(String.valueOf((Math.PI/180)*Double.valueOf(text.getText())));
+		}
+		if(e.getSource()==角度转弧度) {//只能将角度转为弧度
+			text.setText(String.valueOf((180/Math.PI)*Double.valueOf(text.getText())));
+		}
+		if(e.getSource()==menuItem) {
+			JOptionPane.showMessageDialog(null, "简单计算器");
+				
+		}
+		}
+		catch(Exception e2) {
+			System.out.println(e2.getMessage());
+		}
+	}
+}
diff --git a/src/java2020spring/ComputerOperation.java b/src/java2020spring/ComputerOperation.java
new file mode 100644
index 0000000000000000000000000000000000000000..545f42551e5e56a5ff56395994854a7a83c88e82
--- /dev/null
+++ b/src/java2020spring/ComputerOperation.java
@@ -0,0 +1,165 @@
+package java2020spring;
+import java.math.BigDecimal;
+import java2020spring.MyMath;
+
+
+
+import java.math.BigDecimal;
+import java.math.BigDecimal;
+import java.math.BigDecimal;
+public class ComputerOperation {
+	
+	static String num1="0";
+	static String getnum=null;
+	double store;
+	String numString="0123456789.";
+	String calString="+-*/";
+	boolean isCal=false;
+	boolean isSecondNum=false;
+	static String operation=null;
+	MyMath myMath=new MyMath();
+
+   //调用
+	public String calculate(String cmd, String text) {
+		if(cmd.equals("C")) {
+			return cleanAll();
+		}else if(cmd.equals("CE")) {
+			return clean(text);
+		}else if(cmd.equals("back")) {
+			return back(text);	
+		}else if(cmd.equals("+/-")) {
+			return oppsite(text);
+		}else if(cmd.equals("x²")) {
+			return squart(text);
+		}else if(cmd.equals("√")) {
+			return sqrt(text);
+		}else if(cmd.equals("1/x")) {
+			return bottom(text);
+		}else if(numString.indexOf(cmd) != -1) {//来一个数字+cmd+就要立刻先算,要分清第一还是第二个数字
+			return getNumber(cmd,text);
+		}else if(calString.indexOf(cmd) != -1) {
+			return calOperatoin(cmd,text);
+		}else if(cmd.equals("=")) {
+			return cal(text,true);
+		}else if(cmd.equals("%")) {
+			return persent(text,true);
+		}else {
+			return M(cmd,text);
+		}
+		
+
+				
+		
+	}
+	private String cal(String text, boolean b) {
+		isSecondNum=true;
+		
+		getnum=myMath.getResult(operation, getnum, text);
+		isSecondNum=false;
+		operation=null;
+	return getnum;
+	}
+	public String calOperatoin(String cmd, String text) {
+		if(getnum==null||operation==null) {
+			getnum=text;
+			operation=cmd;
+		}else {
+			getnum=myMath.getResult(operation, getnum, text);
+            operation=cmd;
+		}
+		
+		
+			isSecondNum=true;
+			
+	return getnum;
+}
+	//实现
+	//数字
+	public String getNumber(String cmd,String text) {
+		
+		String result = cmd;
+		// text不等于0
+		if (!"0".equals(text)) {
+			if (isSecondNum) {
+				isSecondNum = false;
+			} else {
+				result = text + result;
+			}
+		}
+		if (result.indexOf(".") == 0) {
+			result = "0" + result;
+		}
+        if(text.indexOf(".")!=-1 &&cmd==".") {
+			result=text;
+		}
+		return result;
+	}
+	//C
+	public String cleanAll() {
+		operation=null;
+		getnum=null;
+		return "0";		
+	}
+	
+	//CE
+	public String clean(String text) {
+		
+		return "0";		
+	}
+	//BACK
+	public String back(String text) {
+		if (text=="0"||text=="") {
+			return "0";	
+		}else return text.substring(0,text.length()-1);		
+	}
+	//相反数
+	public String oppsite(String text) {
+		 if(text.indexOf("-")==0) {
+			 return text.substring(1,text.length());
+		 }else {
+			 return "-"+text;
+		 }
+	}
+	//平方
+		public String squart(String text) {
+			 
+				 Double one=Double.valueOf(text);
+				 return String.valueOf(one*one);//有点奇怪
+		 }
+	//开方
+		public String sqrt(String text) {
+			//感觉不对劲
+					 return String.valueOf(Math.sqrt(Double.valueOf(text)));
+						
+		}
+		public String persent(String text, boolean b) {
+			
+			return String.valueOf(Double.valueOf(text)/100);
+						
+		}
+	//倒数
+		public String bottom(String text) {
+		if (text.equals("0")){
+		     return text;
+		}else{
+			//要改
+		     return String.valueOf(MyMath.divide(1, Double.valueOf(text)));
+				}
+		}
+		//储存
+				public String  M(String cmd,String text) {
+					if(cmd.equals("M+")) {
+						store =MyMath.add(store,Double.valueOf(text));
+								
+				 }	else if(cmd.equals("M-")) {
+					 store =MyMath.subtract(store,Double.valueOf(text));
+				 }else if(cmd.equals("MC")) {
+					 store=0;
+				 }else if(cmd.equals("MR")) {
+					 return String.valueOf(store);
+				 }else if(cmd.equals("MS")) {
+					 store = Double.valueOf(text).doubleValue();
+				 }
+					return null;
+				}
+	}
diff --git a/src/java2020spring/MainClass.java b/src/java2020spring/MainClass.java
new file mode 100644
index 0000000000000000000000000000000000000000..944327146367c24cfd34f89c31dac57db9ef56d0
--- /dev/null
+++ b/src/java2020spring/MainClass.java
@@ -0,0 +1,22 @@
+package java2020spring;
+
+import javax.swing.JFrame;
+
+
+
+
+
+public class MainClass {
+
+	public static void main(String[] args) {
+		ComputerFrame frame;
+		frame=new ComputerFrame();
+        frame.setTitle("计算器");
+        frame.setBounds(10,10,450,600);//设置多高宽，还要改
+        frame.MenuBar();
+        frame.setVisible(true);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	}
+
+}
+
diff --git a/src/java2020spring/MyMath.java b/src/java2020spring/MyMath.java
new file mode 100644
index 0000000000000000000000000000000000000000..383705979ae98728f78c085cde2e63a00e94a1c7
--- /dev/null
+++ b/src/java2020spring/MyMath.java
@@ -0,0 +1,45 @@
+package java2020spring;
+
+public class MyMath {
+Double operation,firstNum,secondNum;
+Double result;
+	 public String getResult(String operation,String num1,String num2){
+		
+		 if(operation.equals("*")) {
+				result=Double.valueOf(num1).doubleValue()*Double.valueOf(num2).doubleValue();
+			}else if(operation.equals("-")) {
+				result=Double.valueOf(num1).doubleValue()-Double.valueOf(num2).doubleValue();
+			}else if(operation.equals("+")) {
+				result=Double.valueOf(num1).doubleValue()+Double.valueOf(num2).doubleValue();
+			}else  if(operation.equals("/")) {
+				if(num1.equals("0")) {
+					
+					result=0.0;
+				}
+				result=Double.valueOf(num1).doubleValue()/Double.valueOf(num2).doubleValue();
+				
+			}
+			return String.valueOf(result);
+			
+		}
+	
+	public static double divide(int i, Double valueOf) {
+
+
+		
+		return 1/valueOf;
+	}
+
+
+	public static double add(double store, Double valueOf) {
+		
+		return store+valueOf;
+	}
+
+
+	public static double subtract(double store, Double valueOf) {
+		
+		return store-valueOf;
+	}
+
+}
\ No newline at end of file
diff --git a/src/java2020spring/Test.java b/src/java2020spring/Test.java
deleted file mode 100644
index fc09c195f566d0e707f5e8a2f05fd168069c73a7..0000000000000000000000000000000000000000
--- a/src/java2020spring/Test.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package java2020spring;
-
-public class Test {
-
-	public static void main(String[] args) {
-		System.out.println("Hello world!");
-
-	}
-
-}