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java關(guān)聯(lián)規(guī)則代碼,java關(guān)聯(lián)源碼

【Java問題】有沒有大佬給個(gè)代碼和思路!

因?yàn)轭}目要求拷貝Example1-10.java文件從Java_Source到Java目錄下,可以把數(shù)字拼到文件名的字符串中,從而把Example1-10.java文件,一個(gè)一個(gè)復(fù)制到目標(biāo)目錄下.

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完整的Java程序如下

import java.io.File;

import java.IoException;

public class test{

pubilc static void main(String args[])throws IoException{

for(int i=1;i=10;i++){

String S1 = "G:/Java_Source/Example"+i+".java";

String S2 = "G:/Java/Example"+i+".java";

File Source = new File(S1);

File dest = new File(S2);

java.nio.file.Files.copy(Source.toPath(),dest.toPath());

}

System.out.printIn("File copy");

}

}

java編寫動(dòng)物世界的繼承關(guān)系代碼

我寫了一個(gè),內(nèi)容比較簡單的。代碼如下:public class AnimalTest {

Animal animal;

public void eat(Animal animal){

animal.eat();

}

public void walk(Animal animal){

animal.walk();

}

public static void main(String args[]){

Animal animal=new Animal("animal");

Wolf w=new Wolf("wolf");

Goat g=new Goat("goat");

AnimalTest at=new AnimalTest();

at.eat(animal);

at.eat(w);

at.eat(g);

at.walk(animal);

at.walk(w);

at.walk(g);

}

}

class Animal {

String name;

public Animal(String name){

this.name=name;

}

public Animal(){}

public void setName(String name){

this.name=name;

}

public String getName(){

return name;

}

public void eat(){

System.out.println("animal eat");

}

public void walk(){

System.out.println("animal walk");

}

public String toString(){

return name;

}

}class Wolf extends Animal {

public Wolf(String name){

super(name);

}

public Wolf(){}

public void eat(){

System.out.println("wolf eat meat");

}

public void walk(){

System.out.println("wolf walk");

}

public String toString(){

return name;

}

}class Goat extends Animal {

public Goat(String name){

super(name);

}

public Goat(){}

public void eat(){

System.out.println("goat eat grass");

}

public void walk(){

System.out.println("goat walk");

}

public String toString(){

return name;

}

}

java連接數(shù)據(jù)庫代碼解釋!!!謝謝大神

你好!

這就是個(gè)鏈接數(shù)據(jù)庫的工具類啊。

DB.getResultSet(DB.getConn().getState(),"select

*

from

eval");

拿數(shù)據(jù)庫連接然后執(zhí)行就行了

如有疑問,請追問。

java 代碼 求助

首先for循環(huán)應(yīng)該是執(zhí)行5次

if((++x2)||(++y2)) 應(yīng)該執(zhí)行5次

第一次執(zhí)行過后:x = 1, y = 1

第二次執(zhí)行過后:x = 2, y = 2

第三次執(zhí)行的時(shí)候:先執(zhí)行 ++X 2,這里先執(zhí)行++X

x的值就變成了3,這時(shí)候++x2 這個(gè)條件就成立了,在邏輯符號(hào)或者(||)中,如果前面的條件成立,就說明這個(gè)邏輯運(yùn)算表達(dá)式已經(jīng)是true了,后面的++y2就不再執(zhí)行了,所以之后++y就不再執(zhí)行了,所以結(jié)果是y = 2

java 的超鏈接代碼 怎么寫啊

a href="your target url"Link/a

如果在servlet中:

PrintWriter?out?=?res.getWriter();

out.println("a?href='your?target?url'Link/a");

如果是連接自己項(xiàng)目中的,請注意相對路徑的寫法。建議加上context path.

java線程的經(jīng)典代碼

package threadgroup;

class ThreadDemo3 extends Thread {

private String name;

private int delay;

public ThreadDemo3(String sname, int i_delay) {

name = sname;

delay = i_delay;

}

public void run() {

try {

sleep(delay);

} catch (InterruptedException e) {

}

System.out.println("多線程測試!\n" + name + "\n" + delay);

}

}

public class testMyThread {

public static void main(String[] args) {

ThreadDemo3 th1,th2,th3;

th1 = new ThreadDemo3("線程1", (int) (Math.random() * 900));

th2 = new ThreadDemo3("線程2", (int) (Math.random() * 900));

th3 = new ThreadDemo3("線程3", (int) (Math.random() * 900));

th1.start();

th2.start();

th3.start();

}

}

package threadgroup;

public class threadDemo {

public static void main(String[] args) {

Thread t = Thread.currentThread();

t.setName("你好嗎?");

System.out.println("正在進(jìn)行的Thread是:" + t);

try {

for (int i = 0; i 5; i++) {

System.out.println("我不叫穆繼超" + i);

Thread.sleep(3000);

}

} catch (Exception e) {

// TODO: handle exception

System.out.println("Thread has wrong" + e.getMessage());

}

}

}

package threadgroup;

public class threadDemo2 implements Runnable {

public threadDemo2() {

Thread t1 = Thread.currentThread();

t1.setName("第一個(gè)主進(jìn)程");

System.out.println("正在運(yùn)行" + t1);

Thread t2 = new Thread(this, "");

System.out.println("在創(chuàng)建一個(gè)進(jìn)程");

t2.start();

try {

System.out.println("使他進(jìn)入第一個(gè)睡眠狀態(tài)");

Thread.sleep(2000);

} catch (InterruptedException e) {

System.out.println("Thread has wrong" + e.getMessage());

}

System.out.println("退出第一個(gè)進(jìn)程");

}

public void run() {

try {

for (int i = 0; i 5; i++) {

System.out.println("進(jìn)程" + i);

Thread.sleep(3000);

}

} catch (InterruptedException e) {

// TODO: handle exception

System.out.println("Thread has wrong" + e.getMessage());

}

System.out.println("退出第二個(gè)進(jìn)程");

}

public static void main(String[] args) {

new threadDemo2();

}

}

本文名稱:java關(guān)聯(lián)規(guī)則代碼,java關(guān)聯(lián)源碼
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