求這道題的Java代碼和運(yùn)行截圖

package?guxi.test;

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import?java.util.ArrayList;

import?java.util.List;

public?class?Stu?{

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

ListStu?學(xué)校?=?new?ArrayListStu();

//?測(cè)試學(xué)生

學(xué)校.add(new?Stu("張三",?"No.1"));

學(xué)校.add(new?Stu("李四",?"No.2"));

學(xué)校.add(new?Stu("王五",?"No.3"));

學(xué)校.add(new?Stu("趙六",?"No.4"));

學(xué)校.add(new?Stu("孫七",?"No.5"));

for?(int?i?=?0;?i??學(xué)校.size();?i++)?{

Stu?stu?=?學(xué)校.get(i);

if?(i?%?2?==?0)?{

stu.上課();

}?else?{

stu.考試();

}

stu.study();

}

}

private?static?int?學(xué)生人數(shù);

private?String?學(xué)號(hào);

private?String?姓名;

private?String?性別;

private?String?年齡;

private?String?專(zhuān)業(yè);

private?String?電子郵箱;

private?String?QQ;

private?String?住址;

public?Stu(String?姓名,?String?學(xué)號(hào))?{

this.姓名?=?姓名;

this.學(xué)號(hào)?=?學(xué)號(hào);

學(xué)生人數(shù)++;

System.out.println(姓名?+?"?入學(xué)，學(xué)號(hào)："?+?學(xué)號(hào)?+?"?當(dāng)前學(xué)生人數(shù)："?+?學(xué)生人數(shù));

}

public?void?上課()?{

System.out.println(姓名?+?"?在上課");

}

public?void?考試()?{

System.out.println(姓名?+?"?在考試");

}

public?void?study()?{

System.out.println(姓名?+?"，你要好好學(xué)習(xí)，天天向上");

}

public?String?get學(xué)號(hào)()?{

return?學(xué)號(hào);

}

public?void?set學(xué)號(hào)(String?學(xué)號(hào))?{

this.學(xué)號(hào)?=?學(xué)號(hào);

}

public?String?get姓名()?{

return?姓名;

}

public?void?set姓名(String?姓名)?{

this.姓名?=?姓名;

}

public?String?get性別()?{

return?性別;

}

public?void?set性別(String?性別)?{

this.性別?=?性別;

}

public?String?get年齡()?{

return?年齡;

}

public?void?set年齡(String?年齡)?{

this.年齡?=?年齡;

}

public?String?get專(zhuān)業(yè)()?{

return?專(zhuān)業(yè);

}

public?void?set專(zhuān)業(yè)(String?專(zhuān)業(yè))?{

this.專(zhuān)業(yè)?=?專(zhuān)業(yè);

}

public?String?get電子郵箱()?{

return?電子郵箱;

}

public?void?set電子郵箱(String?電子郵箱)?{

this.電子郵箱?=?電子郵箱;

}

public?String?getQQ()?{

return?QQ;

}

public?void?setQQ(String?qQ)?{

QQ?=?qQ;

}

public?String?get住址()?{

return?住址;

}

public?void?set住址(String?住址)?{

this.住址?=?住址;

}

public?static?int?get學(xué)生人數(shù)()?{

return?學(xué)生人數(shù);

}

}

java 實(shí)現(xiàn)截圖并且 保存在本地

import java.awt.AWTException;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.GraphicsDevice;

import java.awt.GraphicsEnvironment;

import java.awt.Rectangle;

import java.awt.Robot;

import java.awt.Toolkit;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.MouseMotionAdapter;

import java.awt.image.BufferedImage;

import java.awt.image.RescaleOp;

import java.io.File;

import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.Date;

import javax.imageio.ImageIO;

import javax.swing.JFrame;

import javax.swing.filechooser.FileSystemView;

/**

* java截屏

* 運(yùn)行后將當(dāng)前屏幕截取，并最大化顯示。

* 拖拽鼠標(biāo)，選擇自己需要的部分。

* 按Esc鍵保存圖片到桌面，并退出程序。

* 點(diǎn)擊右上角（沒(méi)有可見(jiàn)的按鈕），退出程序，不保存圖片。

*

* @author JinCeon

*/

public class SnapshotTest {

public static void main(String[] args) {

// 全屏運(yùn)行

RectD rd = new RectD();

GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment()

.getDefaultScreenDevice();

gd.setFullScreenWindow(rd);

}

}

class RectD extends JFrame {

private static final long serialVersionUID = 1L;

int orgx, orgy, endx, endy;

Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

BufferedImage image;

BufferedImage tempImage;

BufferedImage saveImage;

Graphics g;

@Override

public void paint(Graphics g) {

RescaleOp ro = new RescaleOp(0.8f, 0, null);

tempImage = ro.filter(image, null);

g.drawImage(tempImage, 0, 0, this);

}

public RectD() {

snapshot();

setVisible(true);

// setSize(d);//最大化窗口

setDefaultCloseOperation(EXIT_ON_CLOSE);

this.addMouseListener(new MouseAdapter() {

public void mousePressed(MouseEvent e) {

orgx = e.getX();

orgy = e.getY();

}

});

this.addMouseMotionListener(new MouseMotionAdapter() {

public void mouseDragged(MouseEvent e) {

endx = e.getX();

endy = e.getY();

g = getGraphics();

g.drawImage(tempImage, 0, 0, RectD.this);

int x = Math.min(orgx, endx);

int y = Math.min(orgy, endy);

int width = Math.abs(endx - orgx)+1;

int height = Math.abs(endy - orgy)+1;

// 加上1，防止width或height為0

g.setColor(Color.BLUE);

g.drawRect(x-1, y-1, width+1, height+1);

//減1，加1都是為了防止圖片將矩形框覆蓋掉

saveImage = image.getSubimage(x, y, width, height);

g.drawImage(saveImage, x, y, RectD.this);

}

});

this.addKeyListener(new KeyAdapter() {

@Override

public void keyReleased(KeyEvent e) {

// 按Esc鍵退出

if (e.getKeyCode() == 27) {

saveToFile();

System.exit(0);

}

}

});

}

public void saveToFile() {

SimpleDateFormat sdf = new SimpleDateFormat("yyyymmddHHmmss");

String name = sdf.format(new Date());

File path = FileSystemView.getFileSystemView().getHomeDirectory();

String format = "jpg";

File f = new File(path + File.separator + name + "." + format);

try {

ImageIO.write(saveImage, format, f);

} catch (IOException e) {

e.printStackTrace();

}

}

public void snapshot() {

try {

Robot robot = new Robot();

Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

image = robot.createScreenCapture(new Rectangle(0, 0, d.width,

d.height));

} catch (AWTException e) {

e.printStackTrace();

}

}

}

Java入門(mén)編程題 求大佬幫忙解答一下 請(qǐng)附上代碼和運(yùn)行截圖

public static void printMax(){

int[][] ay = {{22,91,0,5},{33,21},{19,-1,28,88}};

ListInteger list = new ArrayList();

for (int[] x:ay){

for (int y:x){

list.add(y);

}

}

System.out.println(Collections.max(list));

}

public static void main(String[] args) {

printMax();

}

求java基礎(chǔ)編程和運(yùn)行結(jié)果截圖，程序代碼最好做詳細(xì)解釋?zhuān)f(wàn)分感激

public class Test {//測(cè)試類(lèi)

public static void main(String[] args) {

Student[] stus = new Student[5];

Student stu1 = new Student();

stu1.setAge(11);

stu1.setName("Zhang San");

stus[0] = stu1;

Student stu2 = new Student();

stu2.setAge(22);

stu2.setName("Li Si");

stus[1] = stu2;

Postgraduate p1 = new Postgraduate();

p1.setAge(33);

p1.setName("Wang Wu");

p1.setStudydirection("Computer");

stus[2] = p1;

Postgraduate p2 = new Postgraduate();

p2.setAge(44);

p2.setName("Zhao Liu");

p2.setStudydirection("English");

stus[3] = p1;

Undergraduate u1 = new Undergraduate();

u1.setAge(55);

u1.setName("Ma qi");

u1.setSpecialty("Maths");

stus[4] = u1;

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

stus[i].print();

System.out.println();

}

}

}

class Student {//學(xué)生類(lèi)

private String name;

private int age;

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public void print(){

System.out.println("name: " + name);

System.out.println("Age: " + age);

}

}

class Undergraduate extends Student {//本科生類(lèi)

private String specialty;

public String getSpecialty() {

return specialty;

}

public void setSpecialty(String specialty) {

this.specialty = specialty;

}

public void print(){

super.print();

System.out.println("specialty : " + specialty);

}

}

class Postgraduate extends Student {//研究生類(lèi)Postgraduate

private String studydirection;

public String getStudydirection() {

return studydirection;

}

public void setStudydirection(String studydirection) {

this.studydirection = studydirection;

}

public void print(){

super.print();

System.out.println("studydirection: " + studydirection);

}

}

----------------

name: Zhang San

Age: 11

name: Li Si

Age: 22

name: Wang Wu

Age: 33

studydirection: Computer

name: Wang Wu

Age: 33

studydirection: Computer

name: Ma qi

Age: 55

specialty : Maths

三道java編程題。求全部代碼和執(zhí)行截圖。

public class JavaPractise {

public static void main(String[] args) {

JavaPractise o = new JavaPractise();

String str = "1342973451345";

String subStr = o.getMaxLengthAddPart(str);

System.out.println(subStr);

String binaryFlow = "000011110000011111";

String sameSubStr = o.getMaxSameSubStr(binaryFlow);

System.out.println(sameSubStr);

String letterFlow = "aaBBBcCCCCddddddEEEE";

String sameLettersSubStr = o.getMaxSameLettersSubStr(letterFlow);

System.out.println(sameLettersSubStr);

}

/**

* 校驗(yàn)字符串是否符合數(shù)字規(guī)范

* */

private boolean isNum(String str){

boolean result = true;

if(str.length() 1)

return false;

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

if(str.charAt(i) '0' || ?str.charAt(i) '9')

return false;

}

return result;

}

private boolean isBinaryFlow(String binaryFlow){

boolean result = true;

if(binaryFlow.length() 1)

return false;

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

if(binaryFlow.charAt(i) != ?'0' ?binaryFlow.charAt(i) != '1')

return false;

}

return result;

}

private boolean isLetterFlow(String letterFlow){

boolean result = true;

if(letterFlow.length() 1)

return false;

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

char cur = letterFlow.charAt(i);

if(!( ('z'= cur cur = 'a') || ('Z' = cur cur 'A') ) )

return false;

}

return result;

}

/**

* 獲取最長(zhǎng)增長(zhǎng)數(shù)字的子串

* */

private String getMaxLengthAddPart(String str){

str = str.trim();

if(!isNum(str))

return "";

String temp = ""+str.charAt(0);

String maxSubStr = temp;

for(int i = 1; i str.length(); i++){

char curChar = str.charAt(i);

char lastChar = str.charAt(i-1);

if( curChar lastChar){

temp += curChar;

if(i != (str.length()-1))

continue;//如果當(dāng)前節(jié)點(diǎn)為最后一個(gè)節(jié)點(diǎn)，那么強(qiáng)制進(jìn)入下面環(huán)節(jié)，進(jìn)行

}

maxSubStr = maxSubStr.length() temp.length() ? maxSubStr : temp;

temp = ""+curChar; //清空原數(shù)據(jù)，并從當(dāng)前節(jié)點(diǎn)記錄

}

return maxSubStr;

}

/**

* 二進(jìn)制流最長(zhǎng)字符串判定

* */

private String getMaxSameSubStr(String str){

str = str.trim();

if(!isBinaryFlow(str))

return "";

String temp = ""+str.charAt(0);

String maxSubStr = temp;

for(int i = 1; i str.length(); i++){

char curChar = str.charAt(i);

char lastChar = str.charAt(i-1);

if( curChar == lastChar){

temp += curChar;

if(i != (str.length()-1))

continue;//如果當(dāng)前節(jié)點(diǎn)為最后一個(gè)節(jié)點(diǎn)，那么強(qiáng)制進(jìn)入下面環(huán)節(jié)，進(jìn)行

}

maxSubStr = maxSubStr.length() temp.length() ? maxSubStr : temp;

temp = ""+curChar; //清空原數(shù)據(jù)，并從當(dāng)前節(jié)點(diǎn)記錄

}

return maxSubStr;

}

/**

* 字符串的最長(zhǎng)相同部分截取

* */

private String getMaxSameLettersSubStr(String str){

str = str.trim();

if(!isLetterFlow(str))

return "";

String temp = ""+str.charAt(0);

String maxSubStr = temp;

for(int i = 1; i str.length(); i++){

char curChar = str.charAt(i);

char lastChar = str.charAt(i-1);

if( curChar == lastChar){

temp += curChar;

if(i != (str.length()-1))

continue;//如果當(dāng)前節(jié)點(diǎn)為最后一個(gè)節(jié)點(diǎn)，那么強(qiáng)制進(jìn)入下面環(huán)節(jié)，進(jìn)行

}

maxSubStr = maxSubStr.length() temp.length() ? maxSubStr : temp;

temp = ""+curChar; //清空原數(shù)據(jù)，并從當(dāng)前節(jié)點(diǎn)記錄

}

return maxSubStr;

}

}

運(yùn)行結(jié)果如下：

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