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?{

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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","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?+?'\''?+

'}';

}

}

用JAVA編一個(gè)班級(jí)成績管理系統(tǒng)（我是一個(gè)初學(xué)者希望可以有注釋）

/**

* GenericLinkedStack.java

*/

package fix;

import java.util.EmptyStackException;

/**

*泛型的鏈?zhǔn)綏?shù)據(jù)結(jié)構(gòu)

*/

public class GenericLinkedStackE {

// 棧頂元素

private Item top = null;

// 返回棧頂元素，并彈出

public E pop() throws EmptyStackException {

if (isEmpty()) {

throw new EmptyStackException();

}

E e = top.value;

top = top.next;

return e;

}

/**

* 棧頂壓入一個(gè)元素

* @param e 被壓入的元素

*/

public void push(E e) {

Item curr = new Item(e);

curr.next = top;

top = curr;

}

/**

* 返回棧頂元素，但不出棧

* @return 棧頂元素

*/

public E peek() {

if (isEmpty()) {

throw new EmptyStackException();

}

return top.value;

}

/**

* 判斷棧是否為空

* @return 判斷結(jié)果

*/

public boolean isEmpty() {

return top == null;

}

/**

* 棧中元素

* @author jilen

*

*/

class Item {

//元素

private E value;

//下一個(gè)

private Item next;

public Item(E e) {

this.value = e;

}

public E getValue() {

return value;

}

public void setValue(E value) {

this.value = value;

}

public Item getNext() {

return next;

}

public void setNext(Item next) {

this.next = next;

}

}

}

/**

* InfixToPostfixConverter.java

*/

package fix;

import java.util.Hashtable;

/**

* @author jilen

*

*/

public class InfixToPostfixConverter {

// 操作符及其優(yōu)先級(jí)組成的鍵值對(duì)

private static final HashtableCharacter, Integer operators;

private StringBuffer infix;

private StringBuffer postfix;

GenericLinkedStackCharacter stack = new GenericLinkedStackCharacter();

// 初始化操作符列表，static語句塊會(huì)在加載類時(shí)自動(dòng)執(zhí)行

static {

operators = new HashtableCharacter, Integer();

operators.put('^', 4);

operators.put('*', 3);

operators.put('/', 3);

operators.put('%', 3);

operators.put('+', 2);

operators.put('-', 2);

operators.put('(', -1);

operators.put(')', 5);

}

/**

*

*/

public InfixToPostfixConverter(StringBuffer infix, StringBuffer postfix) {

this.infix = infix;

this.postfix = postfix;

}

/**

* 轉(zhuǎn)換函數(shù)

*/

public void convertToPostfix() {

// 對(duì)輸入字符串中字符遍歷

for (int i = 0, n = infix.length(); i n; i++) {

char c = infix.charAt(i);

// 是數(shù)字之間添加到轉(zhuǎn)換后字符串

if (isNumber(c)) {

postfix.append(c);

} else if (isOperator(c)) {

switch (c) {

// '(' 直接入棧

case '(':

stack.push(c);

break;

// ')' 彈出元素直到碰到'('

case ')':

while (!stack.isEmpty() stack.peek() != '(') {

postfix.append(stack.pop());

}

stack.pop();

break;

// 其他操作符

default:

// 當(dāng)前操作符比棧頂操作符優(yōu)先級(jí)高，直接入棧

if (stack.isEmpty() || precedence(c, stack.peek())) {

stack.push(c);

}

// 當(dāng)前操作符比棧頂操作符優(yōu)先級(jí)低，出棧直到為空或棧頂優(yōu)先級(jí)低于當(dāng)前操作符

else if (!precedence(c, stack.peek())) {

while (!stack.isEmpty() !precedence(c, stack.peek())) {

postfix.append(stack.pop());

}

stack.push(c);

}

break;

}

}

}

// 若棧中還有操作符，所以元素出棧

while (!stack.isEmpty()) {

postfix.append(stack.pop());

}

}

/**

* 判斷是否為操作符

* @param c

* @return

*/

public static boolean isOperator(char c) {

return operators.containsKey(c);

}

/**

* 優(yōu)先級(jí)大小關(guān)系operator1 operator2 則返回true，否則false

* @param operator1

* @param operator2

* @return 判斷結(jié)果

*/

public static boolean precedence(char operator1, char operator2) {

return operators.get(operator1) operators.get(operator2);

}

/**

* 是否數(shù)字

* @param c 要判斷的字符

* @return 判斷結(jié)果

*/

public static boolean isNumber(char c) {

return c = '0' c = '9';

}

}

/**

*Main.java測試類

*/

package fix;

/**

* @author Administrator

*

*/

public class Main {

/**

* @param args

*/

public static void main(String[] args) {

StringBuffer infix = new StringBuffer("(1+2)*3/4");

StringBuffer postfix = new StringBuffer();

InfixToPostfixConverter converter = new InfixToPostfixConverter(infix,

postfix);

converter.convertToPostfix();

System.out.println(postfix.toString());

}

}

中綴轉(zhuǎn)后綴的程序，有GenericLinkedStack.java,InfixToPostfix.java,Main.java三個(gè)源文件需要放在fix包下

用java的if語句編寫個(gè)班級(jí)管理程序，用于接收姓名實(shí)例化，可以自動(dòng)分配學(xué)號(hào)和班級(jí)

public?static?void?main(String...?args)?{

//?姓名列表

String[]?names?=?new?String[]{"張1",?"張2",?"張3",?"張4",?"張5",?"張6",?"張7",?"張8",?"張9",?"張10",?"張11",?"張12",?"張13",?"張14",

"張15",?"張16",?"張17",?"張18",?"張19",?"張20",?"張21",?"張22",?"張23"};

MapString,?ListJSONObject?result?=?new?HashMap();

String?classIndex?=?"class%s";

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

String?classKey?=?String.format(classIndex,?Integer.parseInt(String.valueOf(i?/?10))?+?1);

JSONObject?person?=?new?JSONObject();

person.put("id",?StringUtils.leftPad(String.valueOf(i?+?1),?5,?"0"));

person.put("name",?names[i]);

person.put("class",?classKey);

ListJSONObject?classValues?=?result.get(classKey);

if?(null?==?classValues)?{

classValues?=?new?ArrayList();

classValues.add(person);

result.put(classKey,?classValues);

}?else?{

classValues.add(person);

}

}

System.out.println(JSONObject.toJSONString(result));

}

分享名稱：班級(jí)管理JAVA代碼 基于java的班級(jí)管理系統(tǒng)
轉(zhuǎn)載來于：http://vcdvsql.cn/article18/doiscdp.html

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