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 ÖÐÀàºÍ·½·¨ÐÞÊηû
ÀàµÄÐÞÊÎ
·ÃÎÊÐÞÊηû ÐÞÊηû class ÀàÃû extends ¸¸ÀàÃû³Æ implements ½Ó¿ÚÃû³Æ£¨notes: ·ÃÎÊÐÞÊηû·ûÓëÐÞÊηûµÄλÖÿÉÒÔ»¥»»£©
·ÃÎÊÐÞÊηû
Ãû³Æ
˵Ã÷
±¸×¢
pubic
¿ÉÒÔ±»ËùÓÐÀà·ÃÎÊ(ʹÓÃ)
public Àà±ØÐ붨ÒåÔÚºÍÀàÃûÏàͬµÄͬÃûÎļþÖÐ
package
¿ÉÒÔ±»Í¬Ò»¸ö°üÖеÄÀà·ÃÎÊ(ʹÓÃ)
ĬÈϵķÃÎ ......
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 ......