From 2bc8d5108287f8fbc6f3ac84e47f0ea4e6f52a1d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=BD=99=E8=A8=80=E8=8A=AF?=
 <9135024+yu-yanxin1017@user.noreply.gitee.com>
Date: Thu, 10 Jun 2021 16:22:26 +0800
Subject: [PATCH] 1st

---
 src/java2020spring/Calculator.java       | 196 ++++++++++++++++++
 src/java2020spring/MenuItemListener.java |  20 ++
 src/java2020spring/ScienceCal.java       | 248 +++++++++++++++++++++++
 3 files changed, 464 insertions(+)
 create mode 100644 src/java2020spring/Calculator.java
 create mode 100644 src/java2020spring/MenuItemListener.java
 create mode 100644 src/java2020spring/ScienceCal.java

diff --git a/src/java2020spring/Calculator.java b/src/java2020spring/Calculator.java
new file mode 100644
index 0000000..57db23e
--- /dev/null
+++ b/src/java2020spring/Calculator.java
@@ -0,0 +1,196 @@
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+public class Calculator extends JFrame implements ActionListener{
+	private final String[] KEYS={"7","8","9","÷","sqrt","4","5","6","×","%",
+			"1","2","3","-","1/x","0","+/-",".","+","="};
+	private final String[] COMMAND={"Backspace","CE","C"};
+	private final String[] M ={" ","MC","MR","MS","M+"};
+	private JButton keys[]=new JButton[KEYS.length];
+	private JButton commands[]=new JButton[COMMAND.length];
+	private JButton m[]=new JButton[M.length];
+	private JTextField resultText=new JTextField("0");
+
+	private boolean firstDigit=true;
+	private double resultNum=0.00;
+	private String operator="=";
+	private boolean operateValidFlag=true;
+
+	public Calculator(){
+		super();
+		init();
+		JMenuBar mb=new JMenuBar();
+		JMenu b=new JMenu("查看");
+		JMenuItem c1=new JMenuItem("标准型计算器");
+		JMenuItem c2=new JMenuItem("科学型计算器");
+		setJMenuBar(mb);
+		mb.add(b);
+		b.add(c2);
+		b.add(c1);
+		b.setFont(new Font("黑体", Font.PLAIN, 30));
+		c1.addActionListener(new MenuItemListener());
+		c2.addActionListener(new MenuItemListener());
+		c1.setFont(new Font("黑体", Font.PLAIN, 28));
+		c2.setFont(new Font("黑体", Font.PLAIN, 28));
+		this.setTitle("计算器");
+		this.setLocation(500,400);
+		this.setResizable(false);
+		setVisible(true);
+		this.pack();
+	}
+
+	private void init(){
+		resultText.setHorizontalAlignment(JTextField.RIGHT);
+		resultText.setEditable(false);
+		resultText.setBackground(Color.white);
+		JPanel calckeysPanel=new JPanel();
+		calckeysPanel.setLayout(new GridLayout(4,5,15,10));
+		setResizable(true);
+		for(int i=0;i<KEYS.length;i++){
+			keys[i]=new JButton(KEYS[i]);
+			calckeysPanel.add(keys[i]);
+			keys[i].setForeground(Color.blue);
+			keys[i].setFont(new Font("Times New Roman",Font.PLAIN,30));
+		}
+		keys[3].setForeground(Color.red);
+		keys[8].setForeground(Color.red);
+		keys[13].setForeground(Color.red);
+		keys[18].setForeground(Color.red);
+		keys[19].setForeground(Color.red);
+		keys[4].setForeground(Color.blue);
+		keys[9].setForeground(Color.blue);
+		keys[14].setForeground(Color.blue);
+
+		JPanel commandsPanel=new JPanel();
+		commandsPanel.setLayout(new GridLayout(1,3,4,4));
+		for (int i=0; i<COMMAND.length;i++){
+			commands[i]=new JButton(COMMAND[i]);
+			commandsPanel.add(commands[i]);
+			commands[i].setForeground(Color.black);
+			commands[i].setFont(new Font("Times New Roman",Font.PLAIN,25));
+		}
+
+		JPanel calmsPanel=new JPanel();
+		calmsPanel.setLayout(new GridLayout(5,1,6,6));
+		for (int i=0;i<M.length;i++){
+			m[i]=new JButton(M[i]);
+			calmsPanel.add(m[i]);
+			m[i].setForeground(Color.red);
+			m[i].setFont(new Font("Times New Roman",Font.PLAIN,30));
+		}
+
+		JPanel panel1=new JPanel();
+		panel1.setLayout(new BorderLayout(10,10));
+		panel1.add("North",commandsPanel);
+		panel1.add("West",calckeysPanel);
+		
+		JPanel top=new JPanel();
+		top.setLayout(new BorderLayout());
+		top.add("Center",resultText);
+
+		getContentPane().setLayout(new BorderLayout(3,5));
+		getContentPane().add("North",top);
+		getContentPane().add("Center",panel1);
+		getContentPane().add("West",calmsPanel);
+		
+		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<M.length;i++){
+			m[i].addActionListener(this);
+		}
+	}
+	
+	public void actionPerformed(ActionEvent e){
+		String label=e.getActionCommand();
+		if(label.equals(COMMAND[0])){
+			handleBackspace();
+		}else if(label.equals(COMMAND[1])){
+			resultText.setText("0");
+		}else if(label.equals(COMMAND[2])){
+			handleC();
+		}else if("0123456789.".indexOf(label)>=0){
+			handleNumber(label);
+		}else{
+			handleOperator(label);
+		}
+	}
+	
+	private void handleBackspace(){
+		String text=resultText.getText();
+		int i=text.length();
+		text=text.substring(0,i-1);
+	}
+	private void handleNumber(String key){
+		if(firstDigit){
+			resultText.setText(key);
+		}else if((key.equals("."))&&(resultText.getText().indexOf(".")<0)){
+			resultText.setText(resultText.getText()+".");
+		}else if (!key.equals(".")){
+			resultText.setText(resultText.getText()+key);
+		}
+		firstDigit = false;
+	}
+	private void handleC(){
+		resultText.setText("0");
+		firstDigit=true;
+		operator="=";
+	}
+
+	private void handleOperator(String key){
+		if(operator.equals("÷")){
+			if(getNumberFromText()==0.00) {
+				operateValidFlag = false;
+				resultText.setText("格式错误");
+			}else{
+				resultNum/=getNumberFromText();
+			}
+		}else if(operator.equals("1/x")){
+			if(resultNum==0.00){
+				operateValidFlag=false;
+				resultText.setText("格式错误");
+			}else{
+				resultNum=1/resultNum;
+			}
+		}else if(operator.equals("+")){
+			resultNum+=getNumberFromText();
+		}else if(operator.equals("-")){
+			resultNum-=getNumberFromText();
+		}else if(operator.equals("×")){
+			resultNum*=getNumberFromText();
+		}else if(operator.equals("sqrt")){
+			resultNum=Math.sqrt(getNumberFromText());
+		}else if(operator.equals("%")){
+			resultNum=resultNum/100;
+		}else if(operator.equals("+/-")){
+			resultNum=resultNum*(-1);
+		}else if(operator.equals("=")){
+			resultNum=getNumberFromText();
+		}
+		if(operateValidFlag){
+			long t1;
+			double t2;
+			t1=(long)resultNum;
+			t2=resultNum-t1;
+			if(t2==0){
+				resultText.setText(String.valueOf(t1));
+			}else{
+				resultText.setText(String.valueOf(resultNum));
+			}
+		}
+		operator=key;
+		firstDigit=true;
+		operateValidFlag=true;
+	}
+
+	private double getNumberFromText(){
+		double result=0;
+		try{
+			result=Double.valueOf(resultText.getText()).doubleValue();
+		}catch(NumberFormatException e){}
+		return result;
+	}
+}
\ No newline at end of file
diff --git a/src/java2020spring/MenuItemListener.java b/src/java2020spring/MenuItemListener.java
new file mode 100644
index 0000000..08cb0da
--- /dev/null
+++ b/src/java2020spring/MenuItemListener.java
@@ -0,0 +1,20 @@
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+public class MenuItemListener implements ActionListener{
+	static Calculator a=new Calculator();
+	static ScienceCal b=new ScienceCal();
+	public static void main(String[] args){
+		 a.setVisible(true);
+		 a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	}
+	public void actionPerformed(ActionEvent e){
+		if("标准型计算器".equals(e.getActionCommand())){
+			b.setVisible(false);
+			a.setVisible(true);
+		}else{
+			a.setVisible(false);
+			b.setVisible(true);
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/java2020spring/ScienceCal.java b/src/java2020spring/ScienceCal.java
new file mode 100644
index 0000000..f38e982
--- /dev/null
+++ b/src/java2020spring/ScienceCal.java
@@ -0,0 +1,248 @@
+import java.awt.*;
+import java.text.*;
+import java.awt.event.*;
+import javax.swing.*;
+public class ScienceCal extends JFrame implements ActionListener{
+	private final String[] KEYS={"x^2","x^y","sin","cos","tan","arcsin","arccos","arctan","ln","%","√",
+			"10^x","log","Exp","Mod","x√y","CE","C","Backspace","÷","π","7","8","9","×","n!","4","5","6",
+			"-","±","1","2","3","+","lg"," ","0",".","="};
+	//private final String[]M={"MC","M+","M-","MR","MS"};
+	private JButton keys[]=new JButton[KEYS.length];
+	//private JButton m[]=new JButton[M.length];
+	private JTextField resultText=new JTextField("0");
+	private boolean firstDigit=true;
+	private double resultNum=0.00;
+	private String operator="=";
+	private boolean operateValidFlag=true;
+	DecimalFormat df=new DecimalFormat("0.000000");  
+
+	public ScienceCal(){
+		super();
+		init();
+		JMenuBar mb=new JMenuBar();
+		JMenu b=new JMenu("查看");
+		JMenuItem c1=new JMenuItem("标准型计算器");
+		JMenuItem c2=new JMenuItem("科学型计算器");
+		setJMenuBar(mb);
+		mb.add(b);
+		b.add(c2);
+		b.add(c1);
+		b.setFont(new Font("黑体", Font.PLAIN, 30));
+		c1.addActionListener(new MenuItemListener());
+		c2.addActionListener(new MenuItemListener());
+		c1.setFont(new Font("黑体", Font.PLAIN, 28));
+		c2.setFont(new Font("黑体", Font.PLAIN, 28));
+		this.setBackground(Color.LIGHT_GRAY);
+		this.setTitle("科学型计算器");
+		this.setLocation(200,300);
+		this.setResizable(false);
+		setVisible(false);
+		this.pack();
+	}
+
+	private void init(){
+		resultText.setHorizontalAlignment(JTextField.RIGHT);
+		resultText.setEditable(false);
+		resultText.setBackground(Color.white);
+		resultText.setFont(new Font("Times New Roman", Font.PLAIN, 20));
+		JPanel calckeysPanel = new JPanel();
+		calckeysPanel.setLayout(new GridLayout(8,5,15,10));
+		for(int i=0;i<KEYS.length;i++){
+			keys[i]=new JButton(KEYS[i]);
+			calckeysPanel.add(keys[i]);
+			keys[i].setForeground(Color.blue);
+			keys[i].setFont(new Font("Times New Roman", Font.PLAIN, 20));
+		}
+		keys[21].setForeground(Color.black);
+		keys[22].setForeground(Color.black);
+		keys[23].setForeground(Color.black);
+		keys[26].setForeground(Color.black);
+		keys[27].setForeground(Color.black);
+		keys[28].setForeground(Color.black);
+		keys[31].setForeground(Color.black);
+		keys[32].setForeground(Color.black);
+		keys[33].setForeground(Color.black);
+		keys[37].setForeground(Color.black);
+		
+		keys[16].setForeground(Color.gray);
+		keys[17].setForeground(Color.gray);
+		keys[18].setForeground(Color.gray);
+		keys[20].setForeground(Color.gray);
+		keys[21].setForeground(Color.gray);
+		keys[26].setForeground(Color.gray);
+		keys[31].setForeground(Color.gray);
+		keys[32].setForeground(Color.gray);
+		keys[35].setForeground(Color.gray);
+		keys[36].setForeground(Color.gray);
+		keys[38].setForeground(Color.gray);
+		keys[39].setForeground(Color.gray);
+		
+		keys[19].setForeground(Color.red);
+		keys[24].setForeground(Color.red);
+		keys[25].setForeground(Color.red);
+		keys[29].setForeground(Color.red);
+		keys[34].setForeground(Color.red);
+		keys[39].setForeground(Color.red);
+		
+		/*JPanel calmsPanel=new JPanel();
+		calmsPanel.setLayout(new GridLayout(5,1,15,10));
+		for(int i=0;i<M.length;i++){
+			m[i]=new JButton(M[i]);
+			calmsPanel.add(m[i]);
+			m[i].setForeground(Color.black);
+		}*/
+		
+		JPanel panel1=new JPanel();
+		//panel1.setLayout(new BorderLayout(3,3));
+		panel1.add(calckeysPanel);
+		JPanel top=new JPanel();
+		top.setLayout(new BorderLayout());
+		top.add("Center",resultText);
+		//getContentPane().setLayout(new BorderLayout(3, 5));
+		getContentPane().add("North",top);
+		getContentPane().add("Center",panel1);
+		//getContentPane().add("West",calmsPanel);
+		for(int i=0;i<KEYS.length;i++){
+			keys[i].addActionListener(this);
+		}
+		/*for(int i=0;i<M.length;i++){
+			m[i].addActionListener(this);
+		}*/
+	}
+	public void actionPerformed(ActionEvent e){
+		String label=e.getActionCommand();
+		if(label.equals("Backspace")){
+			handleBackspace();
+		}else if(label.equals("CE")){
+			resultText.setText("0");
+		}else if(label.equals("C")){
+			handleC();
+		}else if("0123456789.".indexOf(label)>=0){
+			handleNumber(label);
+		}else{
+			handleOperator(label);
+		}
+	}
+	private void handleBackspace(){
+		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){
+			resultText.setText(key);
+		}else if((key.equals("."))&&(resultText.getText().indexOf(".")<0)){
+			resultText.setText(resultText.getText()+".");
+		}else if (!key.equals(".")){
+			resultText.setText(resultText.getText()+key);
+		}
+		firstDigit = false;
+	}
+	private void handleC(){
+		resultText.setText("0");
+		firstDigit=true;
+		operator="=";
+	}
+  
+	private void handleOperator(String key){
+		if(operator.equals("÷")){
+			if(getNumberFromText()==0.00){
+				operateValidFlag = false;
+				resultText.setText("格式错误");
+			}else{
+				resultNum/=getNumberFromText();
+			}
+		}else if(operator.equals("1/x")){
+			if(resultNum==0.0){
+				operateValidFlag=false;
+				resultText.setText("格式错误");
+			}else{
+				resultNum=1/resultNum;
+			}
+		}else if(operator.equals("+")){
+			resultNum+=getNumberFromText();
+		}else if(operator.equals("-")){
+			resultNum-=getNumberFromText();
+		}else if(operator.equals("×")){
+			resultNum*=getNumberFromText();
+		}else if(operator.equals("√")){
+			resultNum=Math.sqrt(resultNum);
+		}else if(operator.equals("%")){
+			resultNum=resultNum/100;
+		}else if(operator.equals("±")){
+			resultNum=resultNum*(-1);
+		}else if(operator.equals("sin")){
+			resultNum=Double.parseDouble(df.format(Math.sin(Math.toRadians(getNumberFromText()))));
+		}else if(operator.equals("cos")) {
+			resultNum=Double.parseDouble(df.format(Math.cos(Math.toRadians(getNumberFromText()))));
+		}else if(operator.equals("tan")){
+			resultNum=Double.parseDouble(df.format(Math.tan(Math.toRadians(getNumberFromText()))));
+		}else if(operator.equals("x^2")){
+			resultNum=Double.parseDouble(df.format(Math.pow(resultNum,2)));
+		}else if(operator.equals("x√y")){
+			resultNum=java.lang.StrictMath.pow(resultNum,1.0/getNumberFromText()); 
+		}else if(operator.equals("x^y")){
+			resultNum=Math.pow(resultNum,getNumberFromText());
+		}else if(operator.equals("Exp")){
+			resultNum=Math.pow(Math.E,getNumberFromText());
+		}else if(operator.equals("Mod")){
+			resultNum=resultNum%getNumberFromText();
+		}else if(operator.equals("ln")){
+			resultNum=Math.log(Math.E)/Math.log(resultNum);
+		}else if(operator.equals("lg")){
+			resultNum=Math.log10(resultNum);
+		}else if(operator.equals("log")){
+			resultNum=Math.log(resultNum)/Math.log(getNumberFromText());
+		}else if (operator.equals("arcsin")){
+			resultNum=Double.parseDouble(df.format(Math.asin(resultNum)/Math.PI*180));	
+		}else if(operator.equals("arccos")){
+			resultNum=Double.parseDouble(df.format(Math.acos(resultNum)/Math.PI*180));
+		}else if(operator.equals("arctan")){
+			resultNum=Double.parseDouble(df.format(Math.atan(resultNum)/Math.PI*180));
+		}else if(operator.equals("n!")){
+			resultNum=func(resultNum);
+		}else if(operator.equals("π")){
+			resultNum=Math.PI;
+		}else if(operator.equals("=")){
+			resultNum=getNumberFromText();
+		}
+		if(operateValidFlag){
+			long t1;
+			double t2;
+			t1=(long)resultNum;
+			t2=resultNum-t1;
+			if(t2==0){
+				resultText.setText(String.valueOf(t1));
+			}else{
+				resultText.setText(String.valueOf(resultNum));
+			}
+		}
+		operator=key;
+		firstDigit=true;
+		operateValidFlag=true;
+	}
+
+	private double getNumberFromText(){
+		double result=0;
+		try{
+			result=Double.valueOf(resultText.getText()).doubleValue();
+		}catch(NumberFormatException e){}
+		return result;
+	}
+	private int func(double d){
+		int result=1;
+		for(int i=2;i<=d;++i)
+			result*=i;
+		return result;
+	}
+}
\ No newline at end of file
-- 
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