Java´ò°ü³É¿ÉÖ´ÐÐÎļþ²½ÖèÏê½â
ºËÐÄ˼Ï룺°Ñº¬main·½·¨µÄÈë¿ÚÀàÌí¼Óµ½MANIFEST.MFÎļþÖС£
²½Ö裺
¼ÙÉèÓÐÁ½¸öÀàÎļþÒª´ò°ü£¬ËüÃÇ·Ö±ðÊôÓÚ²»Í¬µÄpackage¡£
package com.test.jar;
import java.awt.*;
import javax.swing.*;
public class Jar extends JFrame
{
public Jar()
{
Toolkit kit = Toolkit.getDefaultToolkit();
setIconImage(kit.getImage("img/ico.gif"));
setTitle("JarTest");
setSize(300, 200);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
}
///////
package com.test.jar;
import java.awt.*;
import javax.swing.*;
public class Jar extends JFrame
{
public Jar()
{
Toolkit kit = Toolkit.getDefaultToolkit();
setIconImage(kit.getImage("img/ico.gif"));
setTitle("JarTest");
setSize(300, 200);
&nb
Ïà¹ØÎĵµ£º
1. Ê×ÏÈString²»ÊôÓÚ8ÖÖ»ù±¾Êý¾ÝÀàÐÍ£¬StringÊÇÒ»¸ö¶ÔÏó¡£
ÒòΪ¶ÔÏóµÄĬÈÏÖµÊÇnull£¬ËùÒÔStringµÄĬÈÏÖµÒ²ÊÇnull£»µ«ËüÓÖÊÇÒ»ÖÖÌØÊâµÄ¶ÔÏó£¬ÓÐÆäËü¶ÔÏóûÓеÄÒ»Ð©ÌØÐÔ¡£
2. new String()ºÍnew String(“”)¶¼ÊÇÉêÃ÷Ò»¸öеĿÕ×Ö·û´®£¬Êǿմ®²»ÊÇnull£»
3. String str=”kvill”£»
String str=n ......
ΪÁËʹ²Ù×÷ϵͳ֧³ÖJava£¬¿ÉÓÉSun¹«Ë¾µÄJavaÏÂÔØÍøÒ³, ¸ù¾Ý²Ù×÷ϵͳÀàÐÍÏÂÔØºÍ°²×°Ò»¸öÃâ·ÑJRE(Java Runtime Environment), ÀýÈç, JRE6¡£È»ºó, ½«±¾ÎļþÏÂÔØ±£´æ, ¿½±´, ²¢Õ³Ìùµ½JREËùÔÚµÄsecurityĿ¼, ÀýÈç, C:/Program Files/Java/jre6/lib/security/, Ìæ»»ÔÓеÄÎļþjava.policy, ÉèÖÃJREÍê³É¡£
......
JAVA´úÂë±àÒëºóÊÇ.classÎļþ,ͨ¹ý·´±à¹¤¾ßºÜÈÝÒ×±»±ðÈË¿´µ½Ô´´úÂë
±£»¤JAVA´úÂëµÄ·½·¨ºÜ¶à£¬ÏÂÃæ½éÉÜÒ»ÖֱȽϷ½±ãʹÓõķ½·¨¡£
obfuscate4eÊÇÒ»¿î²ÉÓûìÏýÆ÷¸Ä±äCLASSÎļþÄÚÈݵķ½·¨¡£
ÏÂÎĽ«½éÉܾßÌåºÍeclipseµÄÕûºÏ·½·¨
1.ÏÂÔØobfuscate4e,¼ÓÈëÕ¾µãhttp://obfuscate4e.org/updates/,Õâ¸öÈí¼þÊǵ¹úÈË¿ª· ......
import java.net.*;
import java.io.*;
public class ReadDemo
{
public static void main(String argv[])
{
try
{
URL url = new URL("http://blog.chinaunix.net/u/15586/showart_1863289.html");
BufferedRe ......
Javaµ±ÖеÄÐòÁл¯£¬ÆäÖ÷ÒªµÄ×÷ÓÃÊǽ«ÀàµÄʵÀý½øÐÐÎÞËð´«Ê䣬»òÕß˵¾ÍÊÇͨ¹ýJavaµÄÐòÁл¯»úÖÆ£¬JavaÀàµÄʵÀý¿ÉÒÔͨ¹ýObjectÁ÷À´´«ÊäºÍÖØÐ»ñÈ¡£¬¶ø²»»áËð»µÀàµÄʵÀý¡£
Ê×ÏÈ£¬ÎÒÃÇ¿´¿´Ê²Ã´ÑùµÄÀàÊÇÐòÁл¯À࣬
1.AÀà×ÔÉíʵÏÖÁËSerializable½Ó¿ÚµÄÀࣻ ......