用JAVA编写一个程序，要求如下：

实现代码如下：

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Student类：

public class Student {

private String name;

private String sex;

private int age;

private double chinese;

private double math;

private double english;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getSex() {

return sex;

}

public void setSex(String sex) {

this.sex = sex;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public double getChinese() {

return chinese;

}

public void setChinese(double chinese) {

this.chinese = chinese;

}

public double getMath() {

return math;

}

public void setMath(double math) {

this.math = math;

}

public double getEnglish() {

return english;

}

public void setEnglish(double english) {

this.english = english;

}

}

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StudentTest类：腊誉（测试类）

import java.util.Scanner;

public class StudentTest {

public static void main(String[] args) {

Student student = new Student();

Scanner sc = new Scanner(System.in);

System.out.println("请输入姓名：");

student.setName(sc.next());

System.out.println("请输入性别：");

student.setSex(sc.next());

System.out.println("请输入年龄：");

student.setAge(sc.nextInt());

System.out.println("请滚衫输入语文成绩、数学成绩、英语成绩：");

student.setChinese(sc.nextDouble());

student.setMath(sc.nextDouble());

student.setEnglish(sc.nextDouble());

Double count = student.getChinese()+ student.getMath()+student.getEnglish();

System.out.println("姓名："+student.getName()+" 性别："+student.getSex()+" 年龄："+student.getAge());

System.out.println("总分："+count+" 平均分："+count/3);

}

}

运行结果为大局腔：

谁帮我讲解下这个java代码

这个比较简单，没啥东西，就是每列开始行的选择，有点绕弯，我就注释下GraphicsPanel吧，主要的绘制工作都在这个类里面

private class GraphicsPanel extends JPanel {

public void paint(Graphics g) {

Graphics2D g2d = (Graphics2D) g;

g2d. setFont (getFont (). deriveFont (Font. BOLD));

g2d. setColor(Color. BLACK);

g2d. fillRect (0, 0, screenSize. width, screenSize. height);   // 设置背景色为黑色

int currentColumn = 0;

for (int x = 0; x  screenSize.width; x += gap) {

int endPos = posArr[currentColumn];      //获得开始行位置

g2d. setColor(Color. GREEN);

g2d.drawString(String.valueOf(getChr()), x, endPos * gap);     //画出随机开始行的字符

int cg = 0;                     和明                                      //初始黑色

for (int j = endPos -16; j  endPos; j++) {           //随机行逐列向上16行，为循环开始行

cg += 15;       碧唯                                              //渐变色15递增，255为green

if (cg  255) {

cg = 255;

}

g2d.setColor(new Color(0, cg, 0));

悔棚培                   g2d.drawString(String.valueOf(getChr()), x, j * gap);    //画出随机行后的15行字符，颜色从黑色渐变成绿色，逐行增加

}

posArr[currentColumn] += random.nextInt(5);      //下落距离最快为4

if (posArr[currentColumn] * gap  getHeight()) {  //如果行数位置大于屏幕高度，从新获取合适的行

posArr[currentColumn] = random.nextInt(lines);

}

currentColumn++;    //下一列获取随机行

}

求一个用JAVA写的简单的记事本源代码程序

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import java.awt.datatransfer.*;

class MyMenuBar extends MenuBar{

public MyMenuBar(Frame parent){

parent.setMenuBar(this);

}

public void addMenus(String [] menus){

for(int i=0;imenus.length;i++)

add(new Menu(menus[i]));

}

public void addMenuItems(int menuNumber,String[] items){

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

if(items[i]!=null)

getMenu(menuNumber).add(new MenuItem(items[i]));

else getMenu(menuNumber).addSeparator();

}

}

public void addActionListener(ActionListener al){

for(int i=0;igetMenuCount();i++)

for(int j=0;j袭禅getMenu(i).getItemCount();j++)

getMenu(i).getItem(j).addActionListener(al);

}

}

class MyFile{

private FileDialog fDlg;

public MyFile(Frame parent){

fDlg=new FileDialog(parent,"",FileDialog.LOAD);

}

private String getPath(){

return fDlg.getDirectory()+"\\"+fDlg.getFile();

}

public String getData() throws IOException{

fDlg.setTitle("打开");

fDlg.setMode(FileDialog.LOAD);

fDlg.setVisible(true);

BufferedReader br=new BufferedReader(new FileReader(getPath()));

StringBuffer sb=new StringBuffer();

String aline;

while((aline=br.readLine())!=null)

sb.append(aline+'\n');

br.close();

return sb.toString();

}

public void setData(String data) throws IOException{

fDlg.setTitle("保拍察尘没春存");

fDlg.setMode(FileDialog.SAVE);

fDlg.setVisible(true);

BufferedWriter bw=new BufferedWriter(new FileWriter(getPath()));

bw.write(data);

bw.close();

}

}

class MyClipboard{

private Clipboard cb;

public MyClipboard(){

cb=Toolkit.getDefaultToolkit().getSystemClipboard();

}

public void setData(String data){

cb.setContents(new StringSelection(data),null);

}

public String getData(){

Transferable content=cb.getContents(null);

try{

return (String) content.getTransferData(DataFlavor.stringFlavor);

//DataFlavor.stringFlavor会将剪贴板中的字符串转换成Unicode码形式的String对象。

//DataFlavor类是与存储在剪贴板上的数据的形式有关的类。

}catch(Exception ue){}

return null;

}

}

class MyFindDialog extends Dialog implements ActionListener{

private Label lFind=new Label("查找字符串");

private Label lReplace=new Label("替换字符串");

private TextField tFind=new TextField(10);

private TextField tReplace=new TextField(10);

private Button bFind=new Button("查找");

private Button bReplace=new Button("替换");

private TextArea ta;

public MyFindDialog(Frame owner,TextArea ta){

super(owner,"查找",false);

this.ta=ta;

setLayout(null);

lFind.setBounds(10,30,80,20);

lReplace.setBounds(10,70,80,20);

tFind.setBounds(90,30,90,20);

tReplace.setBounds(90,70,90,20);

bFind.setBounds(190,30,80,20);

bReplace.setBounds(190,70,80,20);

add(lFind);

add(tFind);

add(bFind);

add(lReplace);

add(tReplace);

add(bReplace);

setResizable(false);

bFind.addActionListener(this);

bReplace.addActionListener(this);

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

MyFindDialog.this.dispose();

}

});

}//构造函数结束

public void showFind(){

setTitle("查找");

setSize(280,60);

setVisible(true);

}

public void showReplace(){

setTitle("查找替换");

setSize(280,110);

setVisible(true);

}

private void find(){

String text=ta.getText();

String str=tFind.getText();

int end=text.length();

int len=str.length();

int start=ta.getSelectionEnd();

if(start==end) start=0;

for(;start=end-len;start++){

if(text.substring(start,start+len).equals(str)){

ta.setSelectionStart(start);

ta.setSelectionEnd(start+len);

return;

}

}

//若找不到待查字符串，则将光标置于末尾

ta.setSelectionStart(end);

ta.setSelectionEnd(end);

}

public Button getBFind() {

return bFind;

}

private void replace(){

String str=tReplace.getText();

if(ta.getSelectedText().equals(tFind.getText()))

ta.replaceRange(str,ta.getSelectionStart(),ta.getSelectionEnd());

else find();

}

public void actionPerformed(ActionEvent e) {

if(e.getSource()==bFind)

find();

else if(e.getSource()==bReplace)

replace();

}

}

public class MyMemo extends Frame implements ActionListener{

private TextArea editor=new TextArea(); //可编辑的TextArea

private MyFile mf=new MyFile(this);//MyFile对象

private MyClipboard cb=new MyClipboard();

private MyFindDialog findDlg=new MyFindDialog(this,editor);

public MyMemo(String title){ //构造函数

super(title);

MyMenuBar mb=new MyMenuBar(this);

//添加需要的菜单及菜单项

mb.addMenus(new String[]{"文件","编辑","查找","帮助"});

mb.addMenuItems(0,new String[]{"新建","打开","保存",null,"全选"});

mb.addMenuItems(1,new String[]{"剪贴","复制","粘贴","清除",null,"全选"});

mb.addMenuItems(2,new String[]{"查找",null,"查找替换"});

mb.addMenuItems(3,new String[]{"我的记事本信息"});

add(editor); //为菜单项注册动作时间监听器

mb.addActionListener(this);

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

MyMemo.this.dispose();

}

}); //分号不能忘了

} //构造函数完

public void actionPerformed(ActionEvent e){

String selected=e.getActionCommand(); //获取菜单项标题

if(selected.equals("新建"))

editor.setText("");

else if(selected.equals("打开")){

try{

editor.setText(mf.getData());

}catch(IOException ie){}

}

else if(selected.equals("保存")){

try{

mf.setData(editor.getText());

}catch(IOException ie){}

}

else if(selected.equals("退出")){

dispose();

}

else if(selected.equals("剪贴")){

//将选中的字符串复制到剪贴板中并清除字符串

cb.setData(editor.getSelectedText());

editor.replaceRange("",editor.getSelectionStart(),editor.getSelectionEnd());

}

else if(selected.equals("复制")){

cb.setData(editor.getSelectedText());

}

else if(selected.equals("粘贴")){

String str=cb.getData();

editor.replaceRange(str,editor.getSelectionStart(),editor.getSelectionEnd());

//粘贴在光标位置

}

else if(selected.equals("清除")){

editor.replaceRange("",editor.getSelectionStart(),editor.getSelectionEnd());

}

else if(selected.equals("全选")){

editor.setSelectionStart(0);

editor.setSelectionEnd(editor.getText().length());

}

else if(selected.equals("查找")){

findDlg.showFind();

}

else if(selected.equals("查找替换")){

findDlg.showReplace();

}

}

public static void main(String[] args){

MyMemo memo=new MyMemo("记事本");

memo.setSize(650,450);

memo.setVisible(true);

}

}

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