import java.awt.*;
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import javax.swing.*;
import java.awt.event.*;
class Counter extends WindowAdapter
{
static JFrame f=new JFrame("計算器");
static JTextField text1=new JTextField("0.");
static String source="";
static String cal="";
static String object="";
static boolean flag=false;
static boolean flag1=true;
static boolean flag2=false;
public void init()
{
try
{
Container c=f.getContentPane();
JPanel pan1=new JPanel();
JButton b1=new JButton("1");
JButton b2=new JButton("2");
JButton b3=new JButton("3");
JButton b4=new JButton("4");
JButton b5=new JButton("5");
JButton b6=new JButton("6");
JButton b7=new JButton("7");
JButton b8=new JButton("8");
JButton b9=new JButton("9");
JButton b0=new JButton("0");
JButton b11=new JButton("+");
JButton b12=new JButton("-");
JButton b13=new JButton("*");
JButton b14=new JButton("/");
JButton b15=new JButton(".");
JButton b16=new JButton("=");
JButton bclar=new JButton("清零");
text1.setHorizontalAlignment(JTextField.RIGHT);
c.add(text1,"North");
c.add(pan1);
A aa=new A();
Result re=new Result();
Opertion op=new Opertion();
Clar cl=new Clar();
b1.addActionListener(aa);
b2.addActionListener(aa);
b3.addActionListener(aa);
b4.addActionListener(aa);
b5.addActionListener(aa);
b6.addActionListener(aa);
b7.addActionListener(aa);
b8.addActionListener(aa);
b9.addActionListener(aa);
b0.addActionListener(aa);
b11.addActionListener(op);
b12.addActionListener(op);
b13.addActionListener(op);
b14.addActionListener(op);
b16.addActionListener(re);
b15.addActionListener(aa);
bclar.addActionListener(cl);
pan1.add(b1);
pan1.add(b2);
pan1.add(b3);
pan1.add(b11);
pan1.add(b4);
pan1.add(b5);
pan1.add(b6);
pan1.add(b12);
pan1.add(b7);
pan1.add(b8);
pan1.add(b9);
pan1.add(b13);
pan1.add(b0);
pan1.add(b15);
pan1.add(b16);
pan1.add(b14);
pan1.add(bclar);
f.setSize(200,220);
f.setVisible(true);
}
catch(Exception e)
{
System.out.println(e.getMessage());
}
}
class A implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String a=text1.getText();
String s=e.getActionCommand();
if(a.equals("0.")||a.equals("+")||a.equals("-")||a.equals("*")||a.equals("/"))
text1.setText(s);
else {
if(flag2)
{
text1.setText(s);
flag2=false;
}
else
text1.setText(a+s);
}
}
}
class Opertion implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
cal=e.getActionCommand();
if(flag1==true)
source=text1.getText();
text1.setText(cal);
flag1=false;
flag=true;
}
}
class Result implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
double num1;
num1=Double.parseDouble(source);
object=text1.getText();
double num2;
num2=Double.parseDouble(object);
double result=0;
if(cal.equals("+"))
result=num1+num2;
if(cal.equals("-"))
result=num1-num2;
if(cal.equals("*"))
result=num1*num2;
if(cal.equals("/"))
if(num2==0)
text1.setText("除數(shù)不能為0");
else
result=num1/num2;
String s1=Double.toString(result);
text1.setText(s1);
flag1=true;
flag2=true;
}
}
class Clar implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
text1.setText("0.");
}
}
public static void main(String[] args)
{
Counter count=new Counter();
count.init();
}
public void windowClosing(WindowEvent e){
System.exit(1);
}
public void windowOpened(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowActivated(WindowEvent e){}
public void windowDeactivated(WindowEvent e){}
}
//引入各種類文件
import?java.awt.Button;
import?java.awt.Color;
import?java.awt.FlowLayout;
import?java.awt.Font;
import?java.awt.Frame;
import?java.awt.GridLayout;
import?java.awt.Panel;
import?java.awt.TextField;
import?java.awt.event.ActionEvent;
import?java.awt.event.ActionListener;
//定義JsqFrame繼承Frame
class?JsqFrame?extends?Frame?{
double?d1,?d2;??//定義兩個double類型的變量
int?op?=?-1;??//定義兩個int類型的變量
static?TextField?tf;//定義靜態(tài)對象TextField
CalPanelL?p1;??//定義CalPanelL對象
//?Constructor構(gòu)造方法
JsqFrame()?{
//以下設(shè)置屬性
super("計算器");
setLayout(new?FlowLayout());
setResizable(false);
setSize(250,?250);
tf?=?new?TextField(18);
tf.setEditable(false);
tf.setBackground(Color.lightGray);
tf.setForeground(Color.red);
tf.setFont(new?Font("Arial",?Font.BOLD,?16));
add(tf);
p1?=?new?CalPanelL();
add(p1);
setVisible(true);
//?addWindowListener(new?Wclose());
}
//添加按鈕繼承Button類
class?CalButton?extends?Button?{
CalButton(String?s)?{
//設(shè)置按鈕屬性
super(s);
setBackground(Color.WHITE);?//設(shè)置顏色為白色
}
}
//定義顯示器繼承Panel類
class?CalPanelL?extends?Panel?{
CalButton?a,?c,?b0,?b1,?b2,?b3,?b4,?b5,?b6,?b7,?b8,?b9,?bPN,?bPoint,
bAdd,?bSub,?bMul,?bDiv,?bL,?bR,?bLn,?bEqual,?bCE,?bQuit;
CalPanelL()?{
//設(shè)置顯示器的屬性
setLayout(new?GridLayout(6,?4));
setFont(new?Font("TimesRoman",?Font.BOLD,?16));
a?=?new?CalButton("");
c?=?new?CalButton("");
b0?=?new?CalButton("0");
b1?=?new?CalButton("1");
b2?=?new?CalButton("2");
b3?=?new?CalButton("3");
b4?=?new?CalButton("4");
b5?=?new?CalButton("5");
b6?=?new?CalButton("6");
b7?=?new?CalButton("7");
b8?=?new?CalButton("8");
b9?=?new?CalButton("9");
bPN?=?new?CalButton("+/-");
bPoint?=?new?CalButton(".");
//?設(shè)置按鈕
bAdd?=?new?CalButton("+");
bSub?=?new?CalButton("-");
bMul?=?new?CalButton("*");
bDiv?=?new?CalButton("/");
bL?=?new?CalButton("(");
bR?=?new?CalButton(")");
bLn?=?new?CalButton("ln");
bEqual?=?new?CalButton("=");
bCE?=?new?CalButton("CE");
bQuit?=?new?CalButton("退出");
//?加入按鈕
add(a);
add(c);
add(bCE);
bCE.addActionListener(new?PressBCE());
add(bQuit);
bQuit.addActionListener(new?PressBQuit());
add(b7);
b7.addActionListener(new?PressB7());
add(b8);
b8.addActionListener(new?PressB8());
add(b9);
b9.addActionListener(new?PressB9());
add(bDiv);
bDiv.addActionListener(new?PressBDiv());
add(b4);
b4.addActionListener(new?PressB4());
add(b5);
b5.addActionListener(new?PressB5());
add(b6);
b6.addActionListener(new?PressB6());
add(bMul);
bMul.addActionListener(new?PressBMul());
add(b1);
b1.addActionListener(new?PressB1());
add(b2);
b2.addActionListener(new?PressB2());
add(b3);
b3.addActionListener(new?PressB3());
add(bSub);
bSub.addActionListener(new?PressBSub());
add(b0);
b0.addActionListener(new?PressB0());
add(bPoint);
bPoint.addActionListener(new?PressBPoint());
add(bPN);
bPN.addActionListener(new?PressBPN());
;
add(bAdd);
bAdd.addActionListener(new?PressBAdd());
add(bL);
bL.addActionListener(new?PressBL());
add(bR);
bR.addActionListener(new?PressBR());
add(bLn);
bLn.addActionListener(new?PressBLn());
add(bEqual);
bEqual.addActionListener(new?PressBEqual());
}
}
//定義PressBAdd實現(xiàn)ActionListener
//大體的意思是按計算機按鍵的時出發(fā)的時間，設(shè)置按鍵的監(jiān)聽[加號的監(jiān)聽事件]
class?PressBAdd?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
try?{
String?d1?=?tf.getText();
op?=?0;
tf.setText(d1?+?"+");
}?catch?(Exception?ee)?{
}
}
}
//定義PressBSub實現(xiàn)ActionListener
//大體的意思是按計算機按鍵的時出發(fā)的時間，設(shè)置按鍵的監(jiān)聽[減號的監(jiān)聽事件]
class?PressBSub?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
try?{
String?d1?=?tf.getText();
op?=?1;
tf.setText(d1?+?"-");
}?catch?(Exception?ee)?{
}
}
}
//定義PressBMul實現(xiàn)ActionListener
//大體的意思是按計算機按鍵的時出發(fā)的時間，設(shè)置按鍵的監(jiān)聽[乘號的監(jiān)聽事件]
class?PressBMul?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
try?{
String?d1?=?tf.getText();
op?=?2;
tf.setText(d1?+?"*");
}?catch?(Exception?ee)?{
}
}
}
//定義PressBDiv實現(xiàn)ActionListener
//大體的意思是按計算機按鍵的時出發(fā)的時間，設(shè)置按鍵的監(jiān)聽[除號的監(jiān)聽事件]
class?PressBDiv?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
try?{
String?d1?=?tf.getText();
op?=?3;
tf.setText(d1?+?"/");
}?catch?(Exception?ee)?{
}
}
}
//定義PressBL實現(xiàn)ActionListener
//大體的意思是按計算機按鍵的時出發(fā)的時間，設(shè)置按鍵的監(jiān)聽[向左鍵的監(jiān)聽事件]
class?PressBL?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
try?{
String?d1?=?tf.getText();
op?=?3;
tf.setText(d1?+?"(");
}?catch?(Exception?ee)?{
}
}
}
//定義PressBR實現(xiàn)ActionListener
//大體的意思是按計算機按鍵的時出發(fā)的時間，設(shè)置按鍵的監(jiān)聽[向右鍵的監(jiān)聽事件]
class?PressBR?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
try?{
String?d1?=?tf.getText();
op?=?3;
tf.setText(d1?+?")");
}?catch?(Exception?ee)?{
}
}
}
//定義PressBEqual實現(xiàn)ActionListener
//大體的意思是按計算機按鍵的時出發(fā)的時間，設(shè)置按鍵的監(jiān)聽[等號的監(jiān)聽事件]
class?PressBEqual?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
try?{
Jsq?jsq?=?new?Jsq();
String?s?=?tf.getText();
System.out.println(s);
while?(s.indexOf("(")?+?1??0??s.indexOf(")")??0)?{
String?s1?=?jsq.caculateHigh(s);
System.out.println(s1);
s?=?s1;
}
String?str?=?jsq.cacluteMain(s);
System.out.println(str);
tf.setText(String.valueOf(str));
}?catch?(Exception?ee)?{
}
}
}
/*
*?批量寫吧
*?以下是按1、2、3等等的監(jiān)聽事件
*?還有清零的等等監(jiān)聽事件
*/
class?PressBLn?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
try?{
double?x?=?Double.parseDouble(tf.getText());
double?y;
y?=?Math.log10(x);
tf.setText(y?+?"");
}?catch?(Exception?ee)?{
}
}
}
class?PressBCE?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
tf.setText("");
}
}
class?PressBPN?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
try?{
String?text?=?tf.getText();
if?(text?!=?"")?{
if?(text.charAt(0)?==?'-')
tf.setText(text.substring(1));
else?if?(text.charAt(0)?=?'0'??text.charAt(0)?=?'9')
tf.setText("-"?+?text.substring(0));
else?if?(text.charAt(0)?==?'.')
tf.setText("-0"?+?text.substring(0));
}
}?catch?(Exception?ee)?{
}
}
}
class?PressBPoint?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
if?(text.lastIndexOf(".")?==?-1)
tf.setText(text?+?".");
}
}
class?PressB0?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"0");
}
}
class?PressB1?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"1");
}
}
class?PressB2?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"2");
}
}
class?PressB3?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"3");
}
}
class?PressB4?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"4");
}
}
class?PressB5?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"5");
}
}
class?PressB6?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"6");
}
}
class?PressB7?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"7");
}
}
class?PressB8?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"8");
}
}
class?PressB9?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
String?text?=?tf.getText();
tf.setText(text?+?"9");
}
}
class?PressBQuit?implements?ActionListener?{
public?void?actionPerformed(ActionEvent?e)?{
System.exit(0);
}
}
public?void?Js()?{
String?text?=?tf.getText();
tf.setText(text);
}
}
import java.awt.Color;
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.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;
import javax.swing.border.LineBorder;
class Normal{
double i,j;
public Normal(double num1,double num2){
i=num1;
j=num2;
}
public double puls(){
return i+j;
}
public double subtract(){
return i-j;
}
public double multiply(){
return i*j;
}
public double divide(){
return i/j;
}
public double surpuls(){
return i%j;
}
}
class scientific extends Normal{
public scientific(int num1, int num2) {
super(num1, num2);
}
}
public class calc extends JFrame{
public static void main(String[] args) {
viewNormal VN= new viewNormal("normal");
}
}
class viewNormal extends JFrame implements ActionListener{
JPanel jp1 = new JPanel(new GridLayout(4,3,5,5));
JPanel jp2 = new JPanel(new GridLayout(5,1,5,5));
JLabel jl;
JButton[] jb;
JButton jbs,jbo,jba,jbb,jbc,jby;
StringBuffer sb = new StringBuffer();
Normal normal;
int dot=0;
double fnum=0;
double lnum=0;
double result;
String sign=null;
public viewNormal(String title){
setTitle(title);
setLayout(null);
setVisible(true);
setBounds(200,200,305,350);
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
jb= new JButton[12];
for(int i=0;i9;i++){
jb[i]=new JButton(""+(i+1));
jp1.add(jb[i]);
jb[i].addActionListener(this);
}
jb[9]=new JButton(".");
jb[10]=new JButton("0");
jb[11]=new JButton("=");
jb[9].addActionListener(this);
jb[10].addActionListener(this);
jb[11].addActionListener(this);
jp1.add(jb[9]);
jp1.add(jb[10]);
jp1.add(jb[11]);
jp1.setBounds(10, 100, 200, 200);
jbs= new JButton("+");jbo= new JButton("-");jba= new JButton("*");
jbb= new JButton("/");jby= new JButton("%");jbc= new JButton("C");
jbs.addActionListener(this);jbo.addActionListener(this);jba.addActionListener(this);
jbb.addActionListener(this);jby.addActionListener(this);jbc.addActionListener(this);
//jp2.add(jby);
jp2.add(jbs);jp2.add(jbo);jp2.add(jba);jp2.add(jbb);jp2.add(jbc);
jp2.setBounds(215, 100, 70, 200);
jl= new JLabel("0",JLabel.RIGHT);
jl.setFont(new Font("Batang",Font.BOLD, 20));
jl.setBorder(new LineBorder(Color.black,2));
jl.setBackground(Color.white);
jl.setBounds(10, 40, 275, 50);
jl.setOpaque(true);
add(jl);
add(jp1);
add(jp2);
}
//+
public void sum(){
lnum=Double.parseDouble(sb.toString());
normal=new Normal(fnum,lnum);
fnum=normal.puls();
result=fnum;
}
//-
private void sub() {
System.out.println(sb.toString());
lnum=Double.parseDouble(sb.toString());
normal=new Normal(fnum,lnum);
fnum=normal.subtract();
result=fnum;
}
//*
private void mul() {
lnum=Double.parseDouble(sb.toString());
normal=new Normal(fnum,lnum);
fnum=normal.multiply();
result=fnum;
}
// /
private void div() {
lnum=Double.parseDouble(sb.toString());
normal=new Normal(fnum,lnum);
fnum=normal.divide();
result=fnum;
}
//%
private void sur() {
lnum=Double.parseDouble(sb.toString());
normal=new Normal(fnum,lnum);
fnum=normal.surpuls();
result=fnum;
}
// =
private void same(){
if(sign.equals("+")){
sum();
}
if(sign.equals("-")){
sub();
}
if(sign.equals("*")){
mul();
}
if(sign.equals("/")){
div();
}
if(sign.equals("%")){
sur();
}
}
//result
public void Result(){
if(result%1!=0)
jl.setText(""+result);
else
{
int i=(int)result;
jl.setText(""+i);
}
}
@Override
public void actionPerformed(ActionEvent e) {
//System.out.println(sb.toString());
// 1~9
for(int i=0;i9;i++){
if(e.getSource()==jb[i]!sb.toString().equals("0")){
sb.append(jb[i].getText());
jl.setText(sb.toString());
}
else if(e.getSource()==jb[i]sb.toString().equals("0")){
int d=sb.length();
sb.delete(0, d);
sb.append(jb[i].getText());
jl.setText(sb.toString());
}
}
// 0
if(e.getSource()==jb[10]!sb.toString().equals("0")){
sb.append(jb[10].getText());
jl.setText(sb.toString());
}
// .
if(e.getSource()==jb[9]dot==0!sb.toString().equals("")){
dot++;
sb.append(jb[9].getText());
jl.setText(sb.toString());
}
// =
if(e.getSource()==jb[11]!sb.toString().equals("")){
same();
Result();
int d=sb.length();
sb.delete(0, d);
dot=0;
}
// +
if(e.getSource()==jbs!sb.toString().equals("")){
if(sign!="+"sign!=null)
same();
else
sum();
sign ="+";
Result();
int d=sb.length();
sb.delete(0, d);
dot=0;
}
//-
if(e.getSource()==jbo!sb.toString().equals("")){
if(fnum==0)
fnum=2*Double.parseDouble(sb.toString());
if(sign!="-"sign!=null)
same();
else
sub();
sign ="-";
Result();
int d=sb.length();
sb.delete(0, d);
dot=0;
}
//*
if(e.getSource()==jba!sb.toString().equals("")){
if(fnum==0)
fnum=1;
if(sign!="*"sign!=null)
same();
else
mul();
sign ="*";
Result();
int d=sb.length();
sb.delete(0, d);
dot=0;
}
// /
if(e.getSource()==jbb!sb.toString().equals("")){
if(fnum==0)
fnum=Math.pow(Double.parseDouble(sb.toString()),2);
if(sign!="/"sign!=null)
same();
else
div();
sign ="/";
Result();
int d=sb.length();
sb.delete(0, d);
dot=0;
}
//%
// if(e.getSource()==jby!sb.toString().equals("")){
// if(fnum==0){
// fnum=Double.parseDouble(sb.toString());
// result=fnum;
// }
// else {
// if(sign!="%"sign!=null)
// same();
// else{
// lnum=Double.parseDouble(sb.toString());
// normal=new Normal(fnum,lnum);
// fnum=normal.surpuls();
// result=fnum;
// }
// }
// sign ="%";
// Result();
// int d=sb.length();
// sb.delete(0, d);
// dot=0;
// }
//clear
if(e.getSource()==jbc){
int d=sb.length();
sb.delete(0, d);
jl.setText("0");
dot=0;
fnum=0;
lnum=0;
sign=null;
}
}
}
class viewScientific extends viewNormal{
public viewScientific(String title){
super(title);
setBounds(200,200,800,500);
}
}
//等號以后輸入符號用不了， String轉(zhuǎn) double 本來就有錯誤，你可以用我的擴展成科學(xué)型的。
具體代碼如下：
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Calculator ?extends JFrame implements ActionListener ?{
private JFrame jf;
private JButton[] allButtons;
private JButton clearButton;
private JTextField jtf;
public Calculator() {
//對圖形組件實例化
jf=new JFrame("任靜的計算器1.0：JAVA版");
jf.addWindowListener(new WindowAdapter(){
public void windowClosing(){
System.exit(0);
}
});
allButtons=new JButton[16];
clearButton=new JButton("清除");
jtf=new JTextField(25);
jtf.setEditable(false);
String str="123+456-789*0.=/";
for(int i=0;iallButtons.length;i++){
allButtons[i]=new JButton(str.substring(i,i+1));
}
}
public void init(){
//完成布局
jf.setLayout(new BorderLayout());
JPanel northPanel=new JPanel();
JPanel centerPanel=new JPanel();
JPanel southPanel=new JPanel();
northPanel.setLayout(new FlowLayout());
centerPanel.setLayout(new GridLayout(4,4));
southPanel.setLayout(new FlowLayout());
northPanel.add(jtf);
for(int i=0;i16;i++){
centerPanel.add(allButtons[i]);
}
southPanel.add(clearButton);
jf.add(northPanel,BorderLayout.NORTH);
jf.add(centerPanel,BorderLayout.CENTER);
jf.add(southPanel,BorderLayout.SOUTH);
addEventHandler();
}
//添加事件監(jiān)聽
public void addEventHandler(){
jtf.addActionListener(this);
for(int i=0;iallButtons.length;i++){
allButtons[i].addActionListener(this);
}
clearButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
Calculator.this.jtf.setText("");
}
});
}
//事件處理
public void actionPerformed(ActionEvent e) {
//在這里完成事件處理 ?使計算器可以運行
String action=e.getActionCommand();
if(action=="+"||action=="-"||action=="*"||action=="/"){
}
}
public void setFontAndColor(){
Font f=new Font("宋體",Font.BOLD,24);
jtf.setFont(f);
jtf.setBackground(new Color(0x8f,0xa0,0xfb));
for(int i=0;i16;i++){
allButtons[i].setFont(f);
allButtons[i].setForeground(Color.RED);
}
}
public void showMe(){
init();
setFontAndColor();
jf.pack();
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args){
new Calculator().showMe();
}
}
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重慶分公司
