在用java做一個(gè)在線考試系統(tǒng)，隨機(jī)抽題遇到了問(wèn)題，我寫(xiě)了一個(gè)隨機(jī)抽題的方法，不知道在asp按鈕中怎么用

import java.util.Random;

創(chuàng)新互聯(lián)建站為企業(yè)級(jí)客戶提高一站式互聯(lián)網(wǎng)+設(shè)計(jì)服務(wù)，主要包括成都網(wǎng)站制作、成都網(wǎng)站設(shè)計(jì)、app軟件定制開(kāi)發(fā)、重慶小程序開(kāi)發(fā)公司、宣傳片制作、LOGO設(shè)計(jì)等，幫助客戶快速提升營(yíng)銷(xiāo)能力和企業(yè)形象，創(chuàng)新互聯(lián)各部門(mén)都有經(jīng)驗(yàn)豐富的經(jīng)驗(yàn)，可以確保每一個(gè)作品的質(zhì)量和創(chuàng)作周期，同時(shí)每年都有很多新員工加入，為我們帶來(lái)大量新的創(chuàng)意。 

import java.util.Scanner;

public class MaxNumber {

private static Scanner input = new Scanner(System.in); // 實(shí)例控制臺(tái)輸入類(lèi)

public static void main(String[] args) {

/*

* 第一步, 按照題目要求 , 我們需要用戶輸入 10 個(gè)數(shù)字

*/

int[] numberArray = new int[10]; // 我們先定義一個(gè) 可以裝 10 個(gè)數(shù)字的數(shù)組

int choose = chooseMode(); // 我加了一個(gè)選擇模式的函數(shù)

if (choose == 1) { // 用戶手工輸入

for (int i = 0; i numberArray.length; i++) { // 循環(huán)輸入

System.out.print("請(qǐng)定義第 '" + (i + 1) + "' 個(gè)數(shù)字："); // 輸出控制臺(tái)提示

numberArray[i] = input.nextInt(); // 要求輸入, 并存儲(chǔ)到數(shù)組變量里

}

} else { // 計(jì)算機(jī)隨機(jī)生成

Random random = new Random(); // 隨機(jī)數(shù)類(lèi)

int tempNumber = 0 ; // 臨時(shí)變量

for (int i = 0; i numberArray.length; i++) { // 計(jì)算機(jī)生成

tempNumber = random.nextInt(100) + 1; // 隨機(jī)生成 1 - 100 的數(shù)

System.out.println("計(jì)算機(jī)生成的第 '" + (i + 1) + "' 個(gè)數(shù)字是：" + tempNumber);

numberArray[i] = tempNumber; // 賦值

}

}

/*

* 第二步 , 找這 10 個(gè)數(shù)當(dāng)中 , 最大的數(shù).

*/

int maxNumber = 0; // 定義一個(gè)變量接收最大的數(shù)

for (int i = 0; i numberArray.length; i++) { // 循環(huán)尋找

/*

* 循環(huán)比對(duì), 一個(gè)接一個(gè)的, 如果 '當(dāng)前數(shù)' , 比我們已經(jīng)記錄的 '最大數(shù)' 還大, 那我們就把當(dāng)前數(shù) 賦給 最大數(shù)

*/

if (numberArray[i] maxNumber) {

maxNumber = numberArray[i];

}

}

System.out.println("其中最大的數(shù)是：" + maxNumber); // 輸出結(jié)果

}

/**

* 選擇模式方法

* @return 返回選擇的模式的編號(hào)

*/

public static int chooseMode() {

System.out.println("------------ 選擇模式 ------------");

System.out.println("\t1. 用戶輸入十個(gè)數(shù)字");

System.out.println("\t2. 計(jì)算機(jī)隨機(jī)產(chǎn)生十個(gè)數(shù)字");

System.out.print("請(qǐng)選擇：");

return input.nextInt(); // 輸入, 返回

}

/*

* 其中包函的知識(shí)有： 控制臺(tái)輸入, 輸出 , 數(shù)組 , 循環(huán) , if 判斷語(yǔ)句

*/

}

最后：

希望能幫到你，如果有什么問(wèn)題可以 Hi 我，

看到樓主花了怎么多耐心，寫(xiě)了怎么多判斷，也可以見(jiàn)得樓主確實(shí)用心了，

只是沒(méi)找到方法。

基于java設(shè)計(jì)一個(gè)學(xué)生成績(jī)管理系統(tǒng)，要求有界面，且有增加，查詢，修改，刪除，退出功能，代碼如何寫(xiě)？

import java.awt.Color;

import java.awt.Font;

import java.awt.Frame;

import java.awt.Label;

import java.awt.TextField;

import java.awt.Window;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.sql.SQLException;

import javax.swing.JButton;

public class Stmessege {

Font font = new Font("楷體", Font.BOLD, 18);

private Frame m = new Frame("登陸成功界面");

protected Window f;

public Stmessege() {

m.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent evt) {

m.setVisible(false);

m.dispose();

System.exit(0);

}

});

m.setSize(460, 360);

m.setBackground(Color.green);

m.setLayout(null);

m.setLocationRelativeTo(null);

Label l0 = new Label("管理員信息");

Font font1 = new Font("楷體", Font.BOLD, 32);

l0.setForeground(Color.blue);

l0.setSize(180, 50);

l0.setLocation(150, 30);

l0.setFont(font1);

final Label l1 = new Label("姓名：");

l1.setSize(60, 20);

l1.setLocation(10, 100);

l1.setFont(font);

TextField tf1 = new TextField("黃朋");

tf1.setForeground(Color.blue);

tf1.setBackground(Color.white);

tf1.setSize(50, 20);

tf1.setLocation(70, 100);

final Label l2 = new Label("學(xué)號(hào)：");

l2.setSize(60, 20);

l2.setLocation(140, 100);

l2.setFont(font);

TextField tf2 = new TextField("111265");

tf2.setForeground(Color.blue);

tf2.setBackground(Color.white);

tf2.setSize(60, 20);

tf2.setLocation(190, 100);

final Label l3 = new Label("性別：");

l3.setSize(60, 20);

l3.setLocation(280, 100);

l3.setFont(font);

TextField tf3 = new TextField("男");

tf3.setForeground(Color.blue);

tf3.setBackground(Color.white);

tf3.setSize(40, 20);

tf3.setLocation(360, 100);

final Label l4 = new Label("班級(jí)：");

l4.setSize(60, 20);

l4.setLocation(10, 170);

l4.setFont(font);

TextField tf4 = new TextField("611231");

tf4.setForeground(Color.blue);

tf4.setBackground(Color.white);

tf4.setSize(60, 20);

tf4.setLocation(67, 170);

final Label l5 = new Label("系別：");

l5.setSize(60, 20);

l5.setLocation(140, 170);

l5.setFont(font);

TextField tf5 = new TextField("計(jì)算機(jī)工程系");

tf5.setForeground(Color.blue);

tf5.setBackground(Color.white);

tf5.setSize(80, 20);

tf5.setLocation(200, 170);

final Label l6 = new Label("成績(jī)：");

l6.setSize(60, 20);

l6.setLocation(280, 170);

l6.setFont(font);

TextField tf6 = new TextField("95");

tf6.setForeground(Color.blue);

tf6.setBackground(Color.white);

tf6.setSize(40, 20);

tf6.setLocation(360, 170);

final Label l7 = new Label("專(zhuān)業(yè)：");

l7.setSize(60, 20);

l7.setLocation(10, 230);

l7.setFont(font);

TextField tf7 = new TextField("軟件技術(shù)");

tf7.setForeground(Color.blue);

tf7.setBackground(Color.white);

tf7.setSize(60, 20);

tf7.setLocation(70, 230);

JButton btn1 = new JButton("添加");

btn1.setForeground(Color.blue);

btn1.setSize(80, 38);

btn1.setLocation(35, 300);

btn1.setFont(font);

btn1.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

new 插入();

m.setVisible(true);

}

});

JButton btn2 = new JButton("查詢學(xué)生學(xué)籍信息");

btn2.setForeground(Color.blue);

btn2.setSize(200, 38);

btn2.setLocation(135, 300);

btn2.setFont(font);

btn2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

Stmessege1 f;

try {

f = new Stmessege1();

f.Stmessege11();

m.setVisible(true);

} catch (SQLException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

} catch (ClassNotFoundException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

}

});

JButton btn3 = new JButton("刪除");

btn3.setForeground(Color.blue);

btn3.setSize(80, 38);

btn3.setLocation(350, 300);

btn3.setFont(font);

btn3.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

new 刪除();

//f.setVisible(false);

m.setVisible(true);

}

});

JButton btn4 = new JButton("更新");

btn4.setForeground(Color.blue);

btn4.setSize(80, 38);

btn4.setLocation(200, 230);

btn4.setFont(font);

btn4.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

new 更新();

m.setVisible(true);

}

});

m.add(l0);

m.add(l1);

m.add(tf1);

m.add(l2);

m.add(tf2);

m.add(l3);

m.add(tf3);

m.add(l4);

m.add(tf4);

m.add(l5);

m.add(tf5);

m.add(l6);

m.add(tf6);

m.add(l7);

m.add(tf7);

m.add(btn1);

m.add(btn2);

m.add(btn3);

m.add(btn4);

m.setVisible(true);

}

public static void main(String[] args) {

new Stmessege();

}

}

可以仿照我的做一下，希望采納，我才一級(jí)哦

java考試系統(tǒng)要求有簡(jiǎn)答題或者程序設(shè)計(jì)題，SQL數(shù)據(jù)庫(kù)

采用mvc設(shè)計(jì)模式即可。設(shè)計(jì)用戶表，試題表，試卷表，考試表

然后系統(tǒng)分為教師和學(xué)生兩種角色

閱卷采用自動(dòng)閱卷和手動(dòng)閱卷兩種模式相結(jié)合

學(xué)生可以參加考試和查看成績(jī)

教師可以發(fā)布試題到指定班級(jí)和時(shí)間

正在寫(xiě)一個(gè)Java考試系統(tǒng)，在這里想滿足：當(dāng)學(xué)生單擊下一題后保留題目的答案，如何設(shè)計(jì)？

使用緩存就可以了，把題目的id保存到緩存里面，具體的題目還是在數(shù)據(jù)庫(kù)里面，需要顯示的時(shí)候根據(jù)id去調(diào)取數(shù)據(jù)

java程序設(shè)計(jì)題，求解答？

shape接口

圓類(lèi)

矩形類(lèi)

三角形類(lèi)1

三角形類(lèi)2

測(cè)試類(lèi)

利用swing設(shè)計(jì)一個(gè)班級(jí)學(xué)生信息管理系統(tǒng)，一道JAVA題 求代碼，不要廢話

public?class?RandomUtils?{

public?static?String?randomId(){

Random?random?=?new?Random();

StringBuilder?sb?=?new?StringBuilder();

for?(int?i?=?0;?i??6;?i++)?{

sb.append(random.nextInt(10));

}

return?sb.toString();

}

public?static?int?randomIntId(){

Random?random?=?new?Random();

StringBuilder?sb?=?new?StringBuilder();

for?(int?i?=?0;?i??6;?i++)?{

sb.append(random.nextInt(10));

}

return?Integer.parseInt(sb.toString());

}

public?static?String?randomName(){

String[]?name1?=?{"趙","錢(qián)","孫","李","周","吳","鄭","王","張","劉"};

String[]?name2?=?{"一","二","三","四","五","六","七","八","九","十"};

Random?random?=?new?Random();

StringBuilder?sb?=?new?StringBuilder();

sb.append(name1[random.nextInt(10)]);

sb.append(name2[random.nextInt(10)]);

sb.append(name2[random.nextInt(10)]);

return?sb.toString();

}

public?static?String?randomSex(){

Random?random?=?new?Random();

return?random.nextInt(4)/2==0?"男":"女";

}

public?static?int?randomAge(int?min,?int?max){

Random?random?=?new?Random();

return?random.nextInt(min)?+?max-min;

}

public?static?int?randomScore(){

Random?random?=?new?Random();

return?(int)(random.nextDouble()*100%100);

}

public?static?String?randomAddress(){

String[]?address1?=?{"商業(yè)","紅葉","安康","河南","長(zhǎng)海","黃河","桐柏","科學(xué)","瑞達(dá)","花園"};

String[]?address2?=?{"東","南","西","北","中"};

String[]?address3?=?{"街","路","大道","巷"};

Random?random?=?new?Random();

StringBuilder?sb?=?new?StringBuilder();

sb.append(address1[random.nextInt(10)]);

sb.append(address2[random.nextInt(5)]);

sb.append(address3[random.nextInt(4)]);

sb.append(random.nextInt(1000)+1);

sb.append("號(hào)");

return?sb.toString();

}

}

import?javax.swing.*;

import?javax.swing.event.TreeSelectionEvent;

import?javax.swing.event.TreeSelectionListener;

import?javax.swing.table.DefaultTableModel;

import?javax.swing.tree.DefaultMutableTreeNode;

import?java.awt.*;

import?java.util.*;

import?java.util.List;

public?class?StudentManage?extends?JFrame{

public?final?static?String[]?CH_NUM?=?{"一","二","三","四","五","六","七","八","九","十"};

public?final?static?String?ROOT?=?"班級(jí)管理";

public?final?static?int?GRADE_NUM?=?3;

public?final?static?int?CLASS_NUM?=?3;

private?MapString,?ListStudent?classes;

public?StudentManage()?{

setTitle("學(xué)生管理系統(tǒng)");

setSize(300,?300);

setLayout(new?BorderLayout());

if(classes?==?null)?classes?=?new?HashMap();

DefaultMutableTreeNode?top?=?new?DefaultMutableTreeNode(ROOT);

DefaultMutableTreeNode[]?gradeNodes?=?new?DefaultMutableTreeNode[GRADE_NUM];

for?(int?i?=?0;?i??GRADE_NUM;?i++)?{

gradeNodes[i]?=?new?DefaultMutableTreeNode(CH_NUM[i]?+?"年級(jí)");

for?(int?j?=?0;?j??CLASS_NUM;?j++)?{

gradeNodes[i].add(new?DefaultMutableTreeNode(CH_NUM[j]?+?"班"));

}

top.add(gradeNodes[i]);

}

final?JTree?tree?=?new?JTree(top);

String?title[]?=?{"ID","姓名","性別","年齡","地址"};

final?DefaultTableModel?model?=?new?DefaultTableModel(title,?0);

JTable?table=new?JTable(model);

tree.addTreeSelectionListener(new?TreeSelectionListener()?{

@Override

public?void?valueChanged(TreeSelectionEvent?e)?{

DefaultMutableTreeNode?node?=?(DefaultMutableTreeNode)?tree?.getLastSelectedPathComponent();

if?(node?==?null)?return;

Object?object?=?node.getUserObject();

if?(node.isLeaf())?{

ListStudent?stdList?=?classes.get(getFullPath(node));

Object[][]?data?=?new?Object[stdList.size()][5];

for?(int?i?=?0;?i??stdList.size();?i++)?{

data[i][0]?=?stdList.get(i).getId();

data[i][1]?=?stdList.get(i).getName();

data[i][2]?=?stdList.get(i).getSex();

data[i][3]?=?stdList.get(i).getAge();

data[i][4]?=?stdList.get(i).getAddress();

}

while(model.getRowCount()0){

model.removeRow(model.getRowCount()-1);

}

for?(int?i?=?0;?i??stdList.size();?i++)?{

model.addRow(data[i]);

}

model.fireTableDataChanged();

}

}

});

add(tree,?BorderLayout.WEST);

add(new?JScrollPane(table),?BorderLayout.CENTER);

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

private?String?getFullPath(DefaultMutableTreeNode?defaultMutableTreeNode){

StringBuilder?sb?=?new?StringBuilder();

Object[]?objs?=?defaultMutableTreeNode.getUserObjectPath();

for?(int?i?=?0;?i??objs.length;?i++)?{

sb.append(objs[i]);

}

return?sb.toString().replace(ROOT,"");

}

public?void?init(){

for?(int?i?=?0;?i??GRADE_NUM;?i++)?{

for?(int?j?=?0;?j??CLASS_NUM;?j++)?{

int?n?=?new?Random().nextInt(30)+1;

ListStudent?stdList?=?new?ArrayList(n);

for?(int?k?=?0;?k??n;?k++)?{

stdList.add(new?Student(RandomUtils.randomIntId(),RandomUtils.randomName(),RandomUtils.randomSex(),

RandomUtils.randomAge(6,12),RandomUtils.randomAddress()));

}

classes.put(CH_NUM[i]?+?"年級(jí)"+?CH_NUM[j]?+"班",?stdList);

}

}

}

public?static?void?main(String[]?args)?{

StudentManage?studentManage?=?new?StudentManage();

studentManage.init();

}

}

class?Student?{

private?int?id;

private?String?name;

private?String?sex;

private?int?age;

private?String?address;

public?Student(int?id,?String?name,?String?sex,?int?age,?String?address)?{

this.id?=?id;

this.name?=?name;

this.sex?=?sex;

this.age?=?age;

this.address?=?address;

}

public?Student()?{

}

public?int?getId()?{

return?id;

}

public?String?getName()?{

return?name;

}

public?String?getSex()?{

return?sex;

}

public?int?getAge()?{

return?age;

}

public?String?getAddress()?{

return?address;

}

@Override

public?String?toString()?{

return?"Student{"?+

"id="?+?id?+

",?name='"?+?name?+?'\''?+

",?sex='"?+?sex?+?'\''?+

",?age="?+?age?+

",?address='"?+?address?+?'\''?+

'}';

}

}

文章名稱：java答題系統(tǒng)設(shè)計(jì)代碼 java程序設(shè)計(jì)基礎(chǔ)題庫(kù)及答案
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