From 25c67d6b56e1c3b1902f11889a01b52994d98513 Mon Sep 17 00:00:00 2001
From: zcc123276388 <123276388@qq.com>
Date: Fri, 11 Jun 2021 14:09:30 +0800
Subject: [PATCH] =?UTF-8?q?202025710328=20=E9=92=9F=E6=89=BF=E6=9D=90=20?=
 =?UTF-8?q?=E5=AE=8C=E6=95=B4=E4=BB=A3=E7=A0=81=EF=BC=8C=E8=AF=B7=E8=80=81?=
 =?UTF-8?q?=E5=B8=88=E6=9F=A5=E9=98=85?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 Mycalculator1 | 207 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 207 insertions(+)
 create mode 100644 Mycalculator1

diff --git a/Mycalculator1 b/Mycalculator1
new file mode 100644
index 0000000..2b497da
--- /dev/null
+++ b/Mycalculator1
@@ -0,0 +1,207 @@
+package java2020spring;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.FlowLayout;
+import java.awt.GridLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.*;
+
+
+ 
+public class Mycalculator1 extends JFrame  implements ActionListener{
+	String n1[]= {"7","8","9","/","sqrt","4","5","6","*","%","1","2","3","-","1/x","0","+/-",".","+","="};//记录基本按钮的数组
+	String m[]= {" ","MC","MR","MS","M+"};
+	String key1[]= {"Backspace","","C"};
+	JTextField text=new JTextField();
+	JPanel numPanel,keyPanel,MPanel,textPanel,Panel;
+	JButton NUM1[]=new JButton[n1.length];
+	JButton KEY1[]=new JButton[key1.length];
+	JButton M[]=new JButton[m.length];
+	boolean firstCheck=true;
+	double result=0.0;
+	String op="=";
+	int num1,num2;
+	boolean operateFlag=true;//判断有没有操作错误
+	void Mycalcultor() {
+		init();
+		this.setResizable(false);
+		pack();
+	}	
+	//初始化计算器
+	//设计计算器界面
+	 void init() {
+		//初始化键盘上的键位，放在一个面板上
+		numPanel=new JPanel();
+		keyPanel=new JPanel();
+		MPanel=new JPanel();
+		GridLayout grid1=new GridLayout(4,5,3,3);
+		numPanel.setLayout(grid1);
+		//初始化按钮，把按钮加到面板内，加装监听器
+		for(int i=0;i<n1.length;i++) {
+			NUM1[i]=new JButton(n1[i]);
+			numPanel.add(NUM1[i]);
+			NUM1[i].addActionListener(this);
+		}
+		//初始化m
+		GridLayout grid2=new GridLayout(5,1,3,3);//行、列、左右间距、上下间距
+		MPanel.setLayout(grid2);
+		for(int i=0;i<m.length;i++) {
+			M[i]=new JButton(m[i]);
+			MPanel.add(M[i]);
+			M[i].addActionListener(this);	
+		}
+		//初始化key
+		GridLayout grid3=new GridLayout();
+		keyPanel.setLayout(grid3);
+		for(int i=0;i<key1.length;i++) {
+			KEY1[i]=new JButton(key1[i]);
+			keyPanel.add(KEY1[i]);
+			KEY1[i].addActionListener(this);
+		}
+		text.setHorizontalAlignment(JTextField.RIGHT);//右对齐
+		textPanel=new JPanel();//外层平板、放入text
+		textPanel.setLayout(new BorderLayout());
+		textPanel.add("Center",text);
+		Panel = new JPanel();//内层大平板放入m num
+		Panel.setLayout(new BorderLayout(3,3));
+		Panel.add("Center",numPanel);
+		Panel.add("North",keyPanel);
+		//整体的布局
+		 getContentPane().setLayout(new BorderLayout(3, 3));
+	     getContentPane().add("North",textPanel);
+	     getContentPane().add("Center", Panel);
+	     getContentPane().add("West", MPanel);
+	 }
+	
+	 public void actionPerformed(ActionEvent ae) {
+		  
+		  String str = ae.getActionCommand();
+		  
+		  if(str.equals("+")) {
+		   
+		   op = "+";
+		   num1 = Integer.parseInt(text.getText());
+		   text.setText("");
+		  }
+		  else if(str.equals("-")) {
+		   op = "-";
+		   num1 = Integer.parseInt(text.getText());
+		   text.setText("");
+		  }
+		  else if(str.equals("*")) {
+		   op = "*";
+		   num1 = Integer.parseInt(text.getText());
+		   text.setText("");
+		  }
+		  else if(str.equals("/")) {
+		   op = "/";
+		   num1 = Integer.parseInt(text.getText());
+		   text.setText("");
+		   }
+		   else if(str.equals("+/-")) {
+			   op = "+/-";
+			   num1 = Integer.parseInt(text.getText());
+			   num1=(-1)*num1;
+			   text.setText(num1+"");
+		  }
+		   else if(str.equals("1/x")) {
+			   op = "/";
+			   num1 = Integer.parseInt(text.getText());
+			   if(num1==0){
+				  text.setText("0没有倒数");
+			   }
+			   else {
+			   double t=(double)num1;
+			   t= (1.0/t);
+			   text.setText(t+"");
+			   }
+		   }
+		   else if(str.equals("sqrt")) {
+			   op = "sqrt";
+			   num1 = Integer.parseInt(text.getText());
+			   num1=  (int) Math.sqrt(num1);
+			   text.setText(num1+"");
+		   }
+		  else if(str.equals("%")) {
+			   op = "%";
+			   num1 = Integer.parseInt(text.getText());
+			   text.setText("");
+		  }
+		  else if(str.equals("=")) {
+		   try {
+		   num2 = Integer.parseInt(text.getText());
+		   }
+		   catch (NumberFormatException e) {
+		    }
+		  
+		  
+		   switch(op) {
+		    
+		    case "+" : result = num1 + num2;
+		     break;
+		    case "-": result = num1 - num2;
+		     break;
+		    case "*" : result = num1 * num2;
+		     break;
+		    case "/" : result = num1 / num2;
+		     break;
+		    case "+/-" : result = num1*(-1);
+		     break;
+		    case "%" : result = num1 % num2;
+		     break;
+		     
+		   }
+		   text.setText(result + "");
+		   result = 0;
+		  }
+		 
+		  else if(str.equals("C")) {
+		   clear();
+		   }
+		  else if(str.equals("Backspace"))
+			  tuige();
+		  else {
+		   text.setText(text.getText() + str);
+		  }
+		 }
+		 
+	
+	private void clear() {
+		  // 初始化计算器的各种值
+        text.setText("");
+        firstCheck = true;
+        op = "=";
+		
+	}
+	
+	private void tuige() {
+		String result = text.getText();
+		int i =result.length();
+		if(i>0) {
+			//退格，将文本最后一个字符去掉
+			result=result.substring(0, i-1);
+			if(i==0) {
+				//如果文本框没有内容，则初始化计算器的各种值
+				text.setText("0");
+				firstCheck = true;
+				op="=";
+			}else {
+				//显示新的文本
+				text.setText(result);
+			}
+		}
+		
+	}
+	
+
+	public static void main(String args[]) {
+		Mycalculator1 calcultor1=new Mycalculator1();
+		calcultor1.Mycalcultor();
+		calcultor1.setTitle("标准计算器");
+		calcultor1.setBounds(100,300,400,220);
+		calcultor1.setVisible(true);
+		calcultor1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		}
+}
\ No newline at end of file
-- 
Gitee