diff --git a/GuiCalculator.java b/GuiCalculator.java
new file mode 100644
index 0000000000000000000000000000000000000000..54986aea82ef7cfde15bb4d08c7ef21eb79460a7
--- /dev/null
+++ b/GuiCalculator.java
@@ -0,0 +1,157 @@
+//GuiCalculator.java
+
+package gitops.idegitplugin;
+
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.GridLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+
+public class GuiCalculator {
+
+	public static void main(String[] args) {
+		CalculatorUI ui=new CalculatorUI("VSCode GitPlugin GuiCalculator");
+		ui.setVisible(true);
+		ui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	}
+
+}
+
+class CalculatorUI extends JFrame
+{
+	private JTextField textField=new JTextField("0");
+	
+	private JPanel panel=new JPanel(new GridLayout(4,4));
+	private JButton bt11=new JButton("7");
+	private JButton bt12=new JButton("8");
+	private JButton bt13=new JButton("9");
+	private JButton bt14=new JButton("/");
+	private JButton bt21=new JButton("4");
+	private JButton bt22=new JButton("5");
+	private JButton bt23=new JButton("6");
+	private JButton bt24=new JButton("*");
+	private JButton bt31=new JButton("1");
+	private JButton bt32=new JButton("2");
+	private JButton bt33=new JButton("3");
+	private JButton bt34=new JButton("-");
+	private JButton bt41=new JButton("0");
+	private JButton bt42=new JButton(".");
+	private JButton bt43=new JButton("=");
+	private JButton bt44=new JButton("+");
+	JButton jb[]={bt11,bt12,bt13,bt14,bt21,bt22,bt23,bt24,
+		bt31,bt32,bt33,bt34,bt41,bt42,bt43,bt44};
+	
+	class MyHandler implements ActionListener
+	{
+		String str="";
+		
+		@Override
+		public void actionPerformed(ActionEvent e) {
+			JButton source=(JButton) e.getSource();
+			
+			if(source==bt43)
+			{
+				str=str+"= "+CalcString.getRes(str);
+				textField.setText(str);
+				
+				int res=JOptionPane.showConfirmDialog(panel, "Calculated, Goon ?", "",JOptionPane.YES_NO_OPTION);
+				if(res==JOptionPane.YES_OPTION)
+				{
+					str="";
+					textField.setText("0");
+				}
+				else
+					System.exit(0);
+					
+			}
+			else
+			{
+				str=str+source.getText();		
+				textField.setText(str);
+			}	
+		}	
+	}
+	public CalculatorUI(String title)
+	{
+		super(title);
+		this.ComponentInit();
+		MyHandler myHandler=new MyHandler();
+		this.ListenerAdd(myHandler);
+		this.setLocation(300, 200);
+		this.setSize(600, 450);
+	}
+	
+	private void ComponentInit()
+	{
+		this.add(textField,BorderLayout.NORTH);
+		textField.setPreferredSize(new Dimension(300,80));
+		textField.setHorizontalAlignment(JTextField.RIGHT);
+		textField.setFont(new Font("楷体",Font.PLAIN,32));
+		textField.setEditable(false);
+		
+		this.add(panel,BorderLayout.CENTER);
+		panel.setPreferredSize(new Dimension(300,350));
+		for(int i=0;i<16;i++){
+			jb[i].setFont(new Font("楷体",Font.BOLD,32));
+			panel.add(jb[i]);
+		}
+		
+	}
+
+	private void ListenerAdd(MyHandler myHandler)
+	{
+		for(int i=0;i<16;i++){
+			jb[i].addActionListener(myHandler);
+		}
+	}
+	
+}
+class CalcString
+{
+	public static double getRes(String str)
+	{
+		String s="";
+		double n1 = 0,n2,res = 0;
+		char op = 0;
+		
+		for(int i=0;i<str.length();i++)
+		{
+			if(str.charAt(i)!='+'&&str.charAt(i)!='-'&&str.charAt(i)!='*'&&str.charAt(i)!='/')
+			{
+				s=s+str.charAt(i);
+			}
+			else
+			{
+				n1=Double.parseDouble(s);
+				op=str.charAt(i);
+				s="";
+			}
+		}
+		n2=Double.parseDouble(s);
+		
+		switch (op) {
+		case '+':
+			res = n1 + n2;
+			break;
+		case '-':
+			res = n1 - n2;
+			break;
+		case '*':
+			res = n1 * n2;
+			break;
+		case '/':
+			res = n1 / n2;
+			break;
+		default:
+		}
+		
+		return res;
+	}
+}
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