/**
成都創(chuàng)新互聯(lián)公司專注于灤南企業(yè)網(wǎng)站建設(shè),響應(yīng)式網(wǎng)站開發(fā),商城網(wǎng)站建設(shè)。灤南網(wǎng)站建設(shè)公司,為灤南等地區(qū)提供建站服務(wù)。全流程按需定制網(wǎng)站，專業(yè)設(shè)計，全程項目跟蹤，成都創(chuàng)新互聯(lián)公司專業(yè)和態(tài)度為您提供的服務(wù)
* 文件名：Operation.java 2014-1-2 下午3:06:37
* @author Administrator
*/
package cc.icoc.javaxu.action;
import java.util.ArrayList;
import java.util.Scanner;
import cc.icoc.javaxu.datas.StudentInfo;
/**
* @author 許仕永
* 創(chuàng)建時間: 2014 2014-1-2 下午3:06:37
*/
public class Operation
{
int stuNo,stuAge;
String stuName,stuClass,stuSex;
ArrayListStudentInfo list;
/**程序入口
* @param args
*/
public static void main(String[] args)
{
// TODO Auto-generated method stub
new Operation().operation();
}
private int inputInt()
{
Scanner scanner = new Scanner(System.in);
return scanner.nextInt();
}
private String inputStr()
{
Scanner scanner = new Scanner(System.in);
return scanner.nextLine();
}
private void operation()
{
// TODO Auto-generated method stub
if(list == null)
{
list = new ArrayListStudentInfo();
}
while(true)
{
System.out.println("\t\t\t學(xué)生信息管理系統(tǒng)\n");
System.out.println("1.信息查閱");
System.out.println("2.信息查詢");
System.out.println("3.信息錄入");
System.out.println("4.退出系統(tǒng)");
int what = inputInt();
if ( what == 1 )
{
getInfo();
} else if ( what == 2 )
{
allSerach();
} else if ( what == 3 )
{
inputInfo();
} else if( what == 4 )
{
System.out.println("已經(jīng)退出系統(tǒng)");
System.exit(0);
}
}
}
/**
* 獲取全部學(xué)生的信息列表
*/
private void getInfo()
{
if(!list.isEmpty())
{
for ( int i = 0; i list.size(); i++ )
{
System.out.println(list.get(i));
}
}
}
/**
* 執(zhí)行查找
*/
private void allSerach()
{
System.out.println("1.輸入學(xué)號進行查詢");
System.out.println("2.輸入姓名進行查詢");
int what = inputInt();
if(what == 1)
{
System.out.println("請輸入學(xué)號：");
search(inputInt());
}
else
{
System.out.println("請輸入姓名：");
search(inputStr());
}
}
/**
* 按學(xué)生姓名查詢學(xué)生信息
* @param name 學(xué)生姓名
*/
private StudentInfo search(String name)
{
for ( int i = 0; i list.size(); i++ )
{
if(list.get(i).getStuName().equals(name))
{
System.out.println(list.get(i));
return list.get(i);
}
}
System.out.println("未查詢到該名字的學(xué)生");
return null;
}
/**
* 按學(xué)號查詢學(xué)生信息
* @param id 學(xué)號
*/
private StudentInfo search(int id)
{
for ( int i = 0; i list.size(); i++ )
{
if(list.get(i).getStuNo()==id)
{
System.out.println(list.get(i));
return list.get(i);
}
}
System.out.println("未查詢到該學(xué)號的學(xué)生");
return null;
}
/**
* 錄入學(xué)生信息
*/
private void inputInfo()
{
try
{
System.out.print("請輸入學(xué)生學(xué)號：\n");
stuNo = inputInt();
System.out.print("請輸入學(xué)生姓名：\n");
stuName = inputStr();
System.out.print("請輸入學(xué)生性別：\n");
stuSex = inputStr();
System.out.print("請輸入學(xué)生年齡：\n");
stuAge = inputInt();
System.out.print("請輸入學(xué)生班級：\n");
stuClass = inputStr();
list.add(new StudentInfo(stuNo, stuAge, stuName, stuSex, stuClass));
} catch (Exception e)
{
// TODO: handle exception
System.out.println("不允許為空，請重新輸入");
}
}
}
package cc.icoc.javaxu.action;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Stu
{
int countStu = 0;
int sum = 0;
int avg = 0;
ListStuBean list = new ArrayListStu.StuBean();
public static void main(String[] args)
{
new Stu().go();
}
private void go()
{
A:while(true)
{
//構(gòu)造實體Bean來存儲學(xué)生成績
StuBean bean = new StuBean();
System.out.println("請輸入成績：");
System.out.println("語文：");
bean.setYuwen(scanner());
System.out.println("數(shù)學(xué)：");
bean.setMath(scanner());
//獲取英語成績
System.out.println("英語：");
bean.setEnglish(scanner());
//存入容器
list.add(bean);
for ( int i = 0; i list.size(); i++ )
{
sum += list.get(i).english+list.get(i).math+list.get(i).yuwen;
}
avg = sum / (3*list.size());
System.out.println("當(dāng)前有"+list.size()+"條學(xué)生記錄，所有學(xué)生總分="+sum+"平均分為"+avg);
//輸入y繼續(xù)錄入學(xué)生信息，輸入x退出
System.out.println("\n已成功錄入一個學(xué)生的數(shù)據(jù)，是否繼續(xù)/退出(y/x)");
if("x".equals(scannerString()))
break A;
}
}
/**輸入*/
private int scanner()
{
Scanner scanner = new Scanner(System.in);
return scanner.nextInt();
}
/**輸入*/
private String scannerString()
{
Scanner scanner = new Scanner(System.in);
return scanner.nextLine();
}
class StuBean
{
int math;
int yuwen;
int english;
public int getMath()
{
return math;
}
public void setMath(int math)
{
this.math = math;
}
public int getYuwen()
{
return yuwen;
}
public void setYuwen(int yuwen)
{
this.yuwen = yuwen;
}
public int getEnglish()
{
return english;
}
public void setEnglish(int english)
{
this.english = english;
}
}
}
/**
* 文件名：StudentInfo.java 2014-1-2 下午3:07:29
* @author Administrator
*/
package cc.icoc.javaxu.datas;
/**
* @author 許仕永
* 創(chuàng)建時間: 2014 2014-1-2 下午3:07:29
*/
public class StudentInfo
{
int stuNo,stuAge;
String stuName,stuSex,stuClass;
public StudentInfo(int stuNo, int stuAge, String stuName, String stuSex, String stuClass)
{
super();
this.stuNo = stuNo;
this.stuAge = stuAge;
this.stuName = stuName;
this.stuSex = stuSex;
this.stuClass = stuClass;
}
public int getStuNo()
{
return stuNo;
}
public void setStuNo(int stuNo)
{
this.stuNo = stuNo;
}
public int getStuAge()
{
return stuAge;
}
public void setStuAge(int stuAge)
{
this.stuAge = stuAge;
}
public String getStuName()
{
return stuName;
}
public void setStuName(String stuName)
{
this.stuName = stuName;
}
public String getStuSex()
{
return stuSex;
}
public void setStuSex(String stuSex)
{
this.stuSex = stuSex;
}
public String getStuClass()
{
return stuClass;
}
public void setStuClass(String stuClass)
{
this.stuClass = stuClass;
}
@Override
public String toString()
{
// TODO Auto-generated method stub
String s = "學(xué)號："+getStuNo()+"\t姓名："+getStuName()+" \t性別："+getStuSex()+"\t年齡："+getStuAge()+"\t班級："+getStuClass();
return s;
}
}
這是我曉得的最簡單的java小程序代碼了你可以看看:
package com.kenki.emp;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import java.sql.SQLException;
import java.sql.*;
public class emp extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
//Initialize global variables
public void init() throws ServletException {
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
String code = request.getParameter("code");
String name = request.getParameter("name");
String pay = request.getParameter("pay");
System.out.println("empcode:" + code);
System.out.println("name:" + name);
System.out.println("pay:" + pay);
//創(chuàng)建驅(qū)動
new com.microsoft.jdbc.sqlserver.SQLServerDriver();
String strd =
"jdbc:microsoft:sqlserver://localhost:1433;databasename=emp_dates";
String username = "sa";
String pws = "";
try {
java.sql.Connection conn = java.sql.DriverManager.getConnection(
strd, username, pws);
String strs = "insert into emp values(?,?,?)";
java.sql.PreparedStatement pre = conn.prepareStatement(strs);
pre.setString(1, code);
pre.setString(2, name);
pre.setString(3, pay);
pre.execute();
pre.close();
conn.close();
//重定向至查詢頁面
out.println("成功保存！！");
response.sendRedirect("emp.html");
} catch (SQLException ss) {
ss.printStackTrace();
response.sendRedirect("/WebModule1/error.html");
}
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
doGet(request, response);
}
//Clean up resources
public void destroy() {
}
}
1.JavaPow.java
import java.util.Scanner;
public class JavaPow {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("請輸入一個數(shù)求平方:");
double num = sc.nextDouble();
System.out.println(num + "的平方結(jié)果是:" + Math.pow(num, 2));
}
}
2.CompareTest.java
public class CompareTest {
public static void main(String[] args) {
int a = 10, b = 8;
if(ab){
System.out.println("排序結(jié)果是:"+b+"\t"+a);
}else{
System.out.println("排序結(jié)果是:"+a+"\t"+b);
}
}
}
3.RateMoney.java
import java.util.Scanner;
public class RateMoney {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
double money=0;
double rate=0;
System.out.print("請輸入?yún)R款金額：");
money=sc.nextDouble();
if(money0){
rate=0;
}
else if(money0money=100){
rate=1;
}else if(money100money=5000){
rate=money/100;
}else{
rate=50;
}
System.out.println("匯"+money+"元錢需匯款費："+rate+"元");
}
}
三個都已經(jīng)寫出來了..
你好好看看吧!!
祝你早日成功!
try{
final int EOF = -1;
HashTable h = new HashTable();
Reader r = new FileReader(new File(args[0]));
int c = r.read();
while (c != EOF){
System.out.print((char)c); // 未作緩沖
Character key = new Character((char)c);
Object count = h.get(key);
if (count == null){count = new Integer(1);}
else {count = new Integer(((Integer)count).intValue + 1);}
h.put(key, count);
c = r.read();
}
}catch{...}
/*計算器*/
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.event.*;
public class Calculator implements ActionListener{
JFrame frame;
JPanel panel;
JTextField tfShow;/*定義顯示文本框*/
JButton b1[]=new JButton[10]; /*數(shù)字按鈕*/
JButton b2[]=new JButton[6]; /*操作按鈕*/
boolean isNumber;/*判斷是否輸入多位數(shù)字的變量*/
double number;/*存儲輸入數(shù)值、顯示結(jié)果的變量*/
double result;/*存儲中間運算結(jié)果的變量*/
char operator;/*存儲當(dāng)前操作符的成員變量*/
public Calculator(){
frame=new JFrame("計算器");
frame.setSize(300,300);/*指定框架窗口的大小*/
frame.setResizable(false);/*使框架窗口不可改變大小*/
JPanel contentPane=(JPanel)frame.getContentPane();
contentPane.setBorder(new EmptyBorder(20,20,20,20));/*繪制框架的指定大小的空透明邊框*/
tfShow=new JTextField("0",25);/*指定屬性的文本域*/
tfShow.setHorizontalAlignment(JTextField.RIGHT);/*設(shè)置文本域中文本的對齊方式*/
isNumber=true;/*初始值設(shè)置*/
number=0;/*初始值設(shè)置*/
result=0;/*初始值設(shè)置*/
operator=' ';/*初始值設(shè)置*/
for(int i=0;ib1.length;i++){
b1[i]=new JButton(Integer.toString(i));/*創(chuàng)建數(shù)字按鈕*/
b1[i].setActionCommand(Integer.toString(i));
b1[i].addActionListener(this);
b1[i].setForeground(Color.blue);
}
String bs[]={"/","*","-","C","+","="};
for(int i=0;ib2.length;i++){
b2[i]=new JButton(bs[i]);/*創(chuàng)建操作按鈕*/
b2[i].setActionCommand(bs[i]);
b2[i].addActionListener(this);
b2[i].setForeground(Color.red);
}
panel=new JPanel();
panel.setLayout(new GridLayout(4,5));
panel.add(b1[1]);
panel.add(b1[2]);
panel.add(b1[3]);
panel.add(b2[0]);
panel.add(b1[4]);
panel.add(b1[5]);
panel.add(b1[6]);
panel.add(b2[1]);
panel.add(b1[7]);
panel.add(b1[8]);
panel.add(b1[9]);
panel.add(b2[2]);
panel.add(b1[0]);
panel.add(b2[3]);
panel.add(b2[4]);
panel.add(b2[5]);
frame.add(tfShow,BorderLayout.NORTH);/*將文本框放置在框架上方*/
frame.add(panel,BorderLayout.CENTER);/*將裝有按鈕組的panel放在框架的中心*/
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);/*設(shè)置框架窗口的默認(rèn)窗口關(guān)閉操作*/
frame.setVisible(true);/*設(shè)置框架可見*/
}
public double getDisplay(){/*返回要顯示的結(jié)果*/
return number;
}
public void reDisplay(){/*刷新文本域的內(nèi)容*/
tfShow.setText(""+getDisplay());
}
/*對輸入數(shù)字的處理*/
public void numberProcess(int num){
if(isNumbernum!=0){
String s1=Integer.toString(num);
String s2=Integer.toString((int)(this.number));
this.number=Double.parseDouble(s2+s1);/*對多位數(shù)字的處理*/
}else{
this.number=num;
}
isNumber=true;/*輸入連續(xù)數(shù)字（即多位數(shù)字）時為真*/
}?
public void operationProcess(char operator){/*根據(jù)輸入的操作符改變當(dāng)前操作符*/
switch(operator){
case '-':
this.operator='-';
break;
case '+':
this.operator='+';
break;
case '*':
this.operator='*';
break;
case '/':
this.operator='/';
break;
}
result=number;
isNumber=false;/*輸入操作符時表示輸入連續(xù)數(shù)字的標(biāo)記變量為假*/
}?
public void clear(){
number=0;
result=0;
}??
public void equal(){/*計算運算結(jié)果*/
switch(operator){
case '-':
result=result-number;
break;
case '+':
result=result+number;
break;
case '*':
result=result*number;
break;
case '/':
result=result/number;
break;
case ' ':
result=number;
break;
}
number=result; /*把運算結(jié)果賦值給顯示變量*/
isNumber=false;
operator=' ';?
}?
public static void main(String args[]){
Calculator cal=new Calculator();/*創(chuàng)建計算器*/
}
public void actionPerformed(ActionEvent e){
String command=e.getActionCommand();/*獲取按鈕激發(fā)的操作事件的命令名稱*/
char c=command.charAt(0);/*將按鈕命令名稱的第一個字符賦值給一個字符c*/
switch(c){
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '0':
int number=Integer.parseInt(command);
numberProcess(number);/*輸入數(shù)字的處理*/
break;
case '+':
case '-':
case '*':
case '/':
operationProcess(c);/*算數(shù)運算符的處理*/
break;
case '=':equal();break;/*計算運算結(jié)果*/
case 'C':clear();break;/*清零*/
}
reDisplay(); /*在文本域中顯示信息*/
}
}
運行截圖：
重慶分公司
重慶分公司
