From 23065c827c37db1f6ebd94a898a81e7b10eaa9d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=B4=BC=E6=B4=BC?= <洼洼@LAPTOP-US8QE6QN>
Date: Wed, 8 Jun 2022 11:02:30 +0800
Subject: [PATCH 1/2] =?UTF-8?q?=E6=88=91=E6=98=AF=E4=BF=A1=E7=AE=A13?=
 =?UTF-8?q?=E7=8F=AD=E7=9A=84=E9=83=AD=E5=96=84=E6=AC=A3=EF=BC=8C=E8=AE=BE?=
 =?UTF-8?q?=E8=AE=A1=E6=80=A7=E8=AF=95=E9=AA=8C=E9=A1=B9=E7=9B=AE=E5=B7=B2?=
 =?UTF-8?q?=E5=A4=A7=E8=87=B4=E5=AE=8C=E6=88=90=EF=BC=8C=E8=AF=B7=E8=80=81?=
 =?UTF-8?q?=E5=B8=88=E6=A3=80=E6=9F=A5=E6=89=B9=E9=98=85=E3=80=82?=
MIME-Version: 1.0
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---
 src/java2022spring/Calculator.java | 290 +++++++++++++++++++++++++++++
 1 file changed, 290 insertions(+)
 create mode 100644 src/java2022spring/Calculator.java

diff --git a/src/java2022spring/Calculator.java b/src/java2022spring/Calculator.java
new file mode 100644
index 0000000..6edf801
--- /dev/null
+++ b/src/java2022spring/Calculator.java
@@ -0,0 +1,290 @@
+package java2022spring;
+//202125710307郭善欣
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Dimension;
+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.JPanel;
+import javax.swing.JTextField;
+import javax.swing.border.EmptyBorder;
+
+@SuppressWarnings("serial")
+public class Calculator extends JFrame implements ActionListener{
+	private JPanel pan;
+	private JTextField resultbox;//最上面那个文本框
+	String []labels= {"%","√x","x²","1/x","C","CE","x³","÷","7","8","9","×","4","5","6","－","1","2","3","+","±","0",".","="};//按钮名字
+	JButton buttons[]=new JButton[labels.length];//按钮
+	private boolean firstDigit=true;
+	Double num1,num2;
+	private String operation=null;
+	
+	public static void main(String[] args) {
+		Calculator frame = new Calculator();
+		frame.setTitle("温柔计算器");
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	    frame.setVisible(true);  //设置可视
+	    frame.setSize(300,300);  //设置大小
+		}
+	
+  //构造方法↓
+	public Calculator() {
+		Color color=new Color(130,248,201);//按钮颜色
+		pan = new JPanel();//初始化面板
+		pan.setBorder(new EmptyBorder(15,15,10,15));
+		pan.setLayout(new BorderLayout(0, 0));
+		setContentPane(pan);
+		resultbox = new JTextField();
+		pan.add(resultbox, BorderLayout.NORTH);//把文本框加到面板上去
+		resultbox.setPreferredSize(new Dimension(300,60));//设置文本框的大小
+		resultbox.setHorizontalAlignment(JTextField.RIGHT);//设置文本框右对齐
+		JPanel panb = new JPanel();
+		pan.add(panb, BorderLayout.CENTER);
+		panb.setLayout(new GridLayout(6,4,7,7));
+		for(int i=0;i<labels.length;i++) {
+			buttons[i]=new JButton(labels[i]);
+			panb.add(buttons[i]);
+			buttons[i].setBackground(color);
+		}
+		for(int i=0;i<labels.length;i++) {
+			buttons[i].addActionListener(this);
+		}
+	}
+
+  //计算↓
+	private void clean() {//清除
+		resultbox.setText(null);
+		operation=null;
+		firstDigit=true;
+	} 
+
+public void actionPerformed(ActionEvent e) {
+		String str=e.getActionCommand();//e.getActionCommand()依赖于按钮上的字符串
+		String text=resultbox.getText();
+		
+		//"C"
+		if(str.equals(labels[4])) {
+			clean();
+			num1=0.0;
+			num2=0.0;
+		}
+		
+		//"%"
+		else if(str.equals(labels[0])) {
+			if(text.length()==0) {
+				resultbox.setText("乖乖在这里输入数字哦~");
+				operation=null;
+				firstDigit=true;
+			}
+			else if("0123456789.".indexOf(text)==-1) {//indexOf(String str):返回第一次出现的制定子字符在此字符串中的索引，-1代表未匹配到元素
+			Double percentage=Double.parseDouble(text);//parseDouble(str):将字符串转换为double类型并输出结果，然后将字符串转换为double类型
+			percentage=percentage/100;
+			String percentage_result=String.valueOf(percentage);//valueOf()将double变量转换成字符
+			resultbox.setText(percentage_result);
+			
+			}
+		}
+		
+		//"√x"
+		else if(str.contentEquals(labels[1])) {
+			if(text.length()==0) {
+				//if("0123456789.".indexOf(text)==-1) {
+			
+				resultbox.setText("乖乖在这里输入数字哦~");
+				operation=null;
+				firstDigit=true;
+			}
+			else {
+			Double sqrt_str=Double.parseDouble(text);
+			if(text.startsWith("-")) {
+				resultbox.setText("诶，负数可不能开根呢~");
+				firstDigit=true;
+				//错误处理功能
+			}
+			else{
+				sqrt_str=Math.sqrt(sqrt_str);
+				resultbox.setText(String.valueOf(sqrt_str));
+			}
+		    }
+		}
+		
+		//"x²"
+		else if(str.equals(labels[2])) {
+			if(text.length()==0) {
+				resultbox.setText("乖乖在这里输入数字哦~");
+				operation=null;
+				firstDigit=true;
+			}
+			else {
+			Double square=Double.parseDouble(text);
+			square=square*square;
+			String square_result=String.valueOf(square);
+			resultbox.setText(square_result);
+			}
+		}
+		
+		//"1/x"
+		else if(str.equals(labels[3])) {
+			if(text.length()==0) {
+				resultbox.setText("乖乖在这里输入数字哦~");
+				operation=null;
+				firstDigit=true;
+			}
+			else {
+				Double reciprocal=Double.parseDouble(text);
+			    if(reciprocal==0.0) {
+			    	resultbox.setText("告诉你一个秘密，零不可以做分母哦~");
+				firstDigit=true;
+				//错误处理功能
+			    }
+			    else {
+			    reciprocal=1/reciprocal;
+			    resultbox.setText(String.valueOf(reciprocal));
+			    }
+			}
+			
+		}
+		
+		
+		//"CE"
+		else if(str.equals(labels[5])) {
+			int num=text.length();
+			if(text.length()==0) {
+				resultbox.setText("乖乖在这里输入数字哦~");
+				operation=null;
+				firstDigit=true;
+			}
+			else {
+				text=text.substring(0,num-1);//substring(int beginIndex, int endIndex)：的作用就是截取父字符串的某一部分
+				resultbox.setText(text);
+			}
+		}
+		
+		
+		//"x³"
+				else if(str.equals(labels[6])) {
+					if(text.length()==0) {
+						resultbox.setText("乖乖在这里输入数字哦~");
+						operation=null;
+						firstDigit=true;
+					}
+					else {
+					Double cube=Double.parseDouble(text);
+					cube=cube*cube*cube;
+					String cube_result=String.valueOf(cube);
+					resultbox.setText(cube_result);
+					}
+				}
+		
+		//数字键和"."
+		else if("0123456789.".indexOf(str) >= 0) {
+			if(firstDigit==true) {
+				if(str.equals(".")) {
+					resultbox.setText("0"+str);
+				}
+				else {
+					resultbox.setText(str);
+				}
+			}
+			else if(str=="."&&resultbox.getText().indexOf(".")<0) {
+				resultbox.setText(resultbox.getText()+str);
+			}
+			else if(str!="."){
+				resultbox.setText(resultbox.getText()+str);
+			}
+			firstDigit=false;
+			}
+		
+		//"+","－",   ×","÷"
+		else if("+－×÷".indexOf(str)!=-1) {
+			if(operation==null) {
+				num1=Double.valueOf(resultbox.getText());
+				resultbox.setText(null);
+				firstDigit=true;
+				operation=str;
+			}
+			else {
+				if(text==null) {
+					operation=str;
+					resultbox.setText(String.valueOf(num1));
+				}
+				if(operation.equals(labels[19])) {
+				num1=num1+Double.valueOf(resultbox.getText());
+				resultbox.setText(null);
+				firstDigit=true;
+				}
+				if(operation.equals(labels[15])) {
+					num1=num1-Double.valueOf(resultbox.getText());
+					resultbox.setText(null);
+					firstDigit=true;
+					}
+				if(operation.equals(labels[11])) {
+					num1=num1*Double.valueOf(resultbox.getText());
+					resultbox.setText(null);
+					firstDigit=true;
+					}
+				if(operation.equals(labels[7])) {
+					num1=num1/Double.valueOf(resultbox.getText());
+					resultbox.setText(null);
+					firstDigit=true;
+					}
+				operation=str;
+		       }
+		}
+		
+		//"="
+		else if(str.equals(labels[23])) {
+			if(text==null) {
+				num2=0.0;
+			}
+			else {
+				if(operation==null) {
+				num1=Double.valueOf(text);
+				resultbox.setText(String.valueOf(num1));
+			    }
+				num2=Double.valueOf(text);
+			
+			if(operation.equals(labels[19])) {
+				num1=num1+num2;
+				resultbox.setText(String.valueOf(num1));
+			}
+			if(operation.equals(labels[15])) {
+				num1=num1-num2;
+				resultbox.setText(String.valueOf(num1));
+			}
+			if(operation.equals(labels[11])) {
+				num1=num1*num2;
+				resultbox.setText(String.valueOf(num1));
+			}
+			if(operation.equals(labels[7])) {
+				if(num2!=0.0) {
+					num1=num1/num2;
+					resultbox.setText(String.valueOf(num1));
+				}
+				else{
+					resultbox.setText("宝，零不可以被除耶~");
+					firstDigit=true;
+					}
+			}
+			operation=null;
+			}
+		}
+		
+		//±
+		else if(str.equals(labels[20])){
+			if(text.length()==0) {
+				resultbox.setText("乖乖在这里输入数字哦~");
+				firstDigit=true;
+			}
+			else {
+			Double before=Double.parseDouble(text);
+			before=-before;
+			resultbox.setText(String.valueOf(before));
+			}
+		}
+}
+}
-- 
Gitee


From 92022633ca95cc20d4b451d981bf223875c2efc2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=B4=BC=E6=B4=BC?= <洼洼@LAPTOP-US8QE6QN>
Date: Thu, 9 Jun 2022 16:57:30 +0800
Subject: [PATCH 2/2] =?UTF-8?q?=E6=88=91=E6=98=AF=E4=BF=A1=E7=AE=A13?=
 =?UTF-8?q?=E7=8F=AD7=E5=8F=B7=E9=83=AD=E5=96=84=E6=AC=A3=EF=BC=8C?=
 =?UTF-8?q?=E9=A1=B9=E7=9B=AE=E5=B7=B2=E5=AE=8C=E6=88=90=EF=BC=8C=E5=AF=B9?=
 =?UTF-8?q?=E6=AF=94=E4=B8=8A=E4=B8=80=E6=AC=A1=E6=8F=90=E4=BA=A4=E8=A7=A3?=
 =?UTF-8?q?=E5=86=B3=E4=BA=86=E7=B2=BE=E5=BA=A6=E6=8D=9F=E5=A4=B1=E7=9A=84?=
 =?UTF-8?q?=E9=97=AE=E9=A2=98=EF=BC=8C=E5=87=8F=E5=B0=91=E4=BA=86=E8=AF=AF?=
 =?UTF-8?q?=E5=B7=AE=EF=BC=8C=E8=AF=B7=E8=80=81=E5=B8=88=E6=A3=80=E6=9F=A5?=
 =?UTF-8?q?=E6=89=B9=E9=98=85=E3=80=82?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/java2022spring/Calculator.java | 40 +++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 14 deletions(-)

diff --git a/src/java2022spring/Calculator.java b/src/java2022spring/Calculator.java
index 6edf801..00d7a4a 100644
--- a/src/java2022spring/Calculator.java
+++ b/src/java2022spring/Calculator.java
@@ -7,6 +7,8 @@ import java.awt.Dimension;
 import java.awt.GridLayout;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.math.BigDecimal;
+
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JPanel;
@@ -31,7 +33,7 @@ public class Calculator extends JFrame implements ActionListener{
 	    frame.setSize(300,300);  //设置大小
 		}
 	
-  //构造方法↓
+//构造方法↓
 	public Calculator() {
 		Color color=new Color(130,248,201);//按钮颜色
 		pan = new JPanel();//初始化面板
@@ -55,7 +57,7 @@ public class Calculator extends JFrame implements ActionListener{
 		}
 	}
 
-  //计算↓
+//计算↓
 	private void clean() {//清除
 		resultbox.setText(null);
 		operation=null;
@@ -92,8 +94,6 @@ public void actionPerformed(ActionEvent e) {
 		//"√x"
 		else if(str.contentEquals(labels[1])) {
 			if(text.length()==0) {
-				//if("0123456789.".indexOf(text)==-1) {
-			
 				resultbox.setText("乖乖在这里输入数字哦~");
 				operation=null;
 				firstDigit=true;
@@ -199,7 +199,7 @@ public void actionPerformed(ActionEvent e) {
 			firstDigit=false;
 			}
 		
-		//"+","－",   ×","÷"
+		//"+","－","×","÷"
 		else if("+－×÷".indexOf(str)!=-1) {
 			if(operation==null) {
 				num1=Double.valueOf(resultbox.getText());
@@ -213,17 +213,23 @@ public void actionPerformed(ActionEvent e) {
 					resultbox.setText(String.valueOf(num1));
 				}
 				if(operation.equals(labels[19])) {
-				num1=num1+Double.valueOf(resultbox.getText());
-				resultbox.setText(null);
-				firstDigit=true;
+					BigDecimal b1 = new BigDecimal(Double.toString(num1));
+					BigDecimal b2 = new BigDecimal(Double.toString(Double.valueOf(resultbox.getText())));
+					num1= b1.add(b2).doubleValue();
+					resultbox.setText(null);
+					firstDigit=true;
 				}
 				if(operation.equals(labels[15])) {
-					num1=num1-Double.valueOf(resultbox.getText());
+					BigDecimal b1 = new BigDecimal(Double.toString(num1));
+					BigDecimal b2 = new BigDecimal(Double.toString(Double.valueOf(resultbox.getText())));
+					num1= b1.subtract(b2).doubleValue();
 					resultbox.setText(null);
 					firstDigit=true;
 					}
 				if(operation.equals(labels[11])) {
-					num1=num1*Double.valueOf(resultbox.getText());
+				    BigDecimal b1 = new BigDecimal(Double.toString(num1));
+				    BigDecimal b2 = new BigDecimal(Double.toString(Double.valueOf(resultbox.getText())));
+				    num1= b1.multiply(b2).doubleValue();
 					resultbox.setText(null);
 					firstDigit=true;
 					}
@@ -249,16 +255,22 @@ public void actionPerformed(ActionEvent e) {
 				num2=Double.valueOf(text);
 			
 			if(operation.equals(labels[19])) {
-				num1=num1+num2;
+				BigDecimal b1 = new BigDecimal(Double.toString(num1));
+				BigDecimal b2 = new BigDecimal(Double.toString(Double.valueOf(resultbox.getText())));
+				num1= b1.add(b2).doubleValue();
 				resultbox.setText(String.valueOf(num1));
 			}
 			if(operation.equals(labels[15])) {
-				num1=num1-num2;
+				BigDecimal b1 = new BigDecimal(Double.toString(num1));
+				BigDecimal b2 = new BigDecimal(Double.toString(Double.valueOf(resultbox.getText())));
+				num1= b1.subtract(b2).doubleValue();
 				resultbox.setText(String.valueOf(num1));
 			}
 			if(operation.equals(labels[11])) {
-				num1=num1*num2;
-				resultbox.setText(String.valueOf(num1));
+				 BigDecimal b1 = new BigDecimal(Double.toString(num1));
+				 BigDecimal b2 = new BigDecimal(Double.toString(Double.valueOf(resultbox.getText())));
+				 num1= b1.multiply(b2).doubleValue();
+				 resultbox.setText(String.valueOf(num1));
 			}
 			if(operation.equals(labels[7])) {
 				if(num2!=0.0) {
-- 
Gitee