EclipseÖн«JavaÏîÄ¿£¨ÒýÓÃÁ˵ÚÈý·½°ü) ´ò°üΪjar
Èç¹û×Ô¼ºµÄjava projectÖÐÐèÒªÒýÓöîÍâµÄjar°ü×÷Ϊ×ÊÔ´Îļþ£¬ÄÇôÐèÒª×Ô¶¨ÒåÅäÖÃÎļþMANIFEST.MF ,ÀýÈ磺
Manifest-Version: 1.0
Class-Path: lib\crimson.jar lib\jbcl.jar lib\junit.jar lib\log4j-1.2.13.jar lib\mysql-connector-java-3.1.13-bin.jar
Main-Class: src.YourMainClassName
ÆäÖеÄClass-Path¾ÍÖ¸¶¨ÁËÍâÀ´jar°üµÄλÖá£Çë×¢Òâ¼ÙÉèÎÒÃǵÄÏîÄ¿´ò°üºóΪproject.jar£¬ÄÇô°´ÕÕÉÏÃæµÄ¶¨Ò壬Ӧ¸ÃÔÚ project.jarµÄͬ²ãĿ¼Ï½¨Á¢Ò»¸ölibÎļþ¼Ð£¬²¢½«Ïà¹ØµÄjar°ü·ÅÔÚÀïÃæ¡£·ñÔò½«»á³öÏÖException in thread "main" java.lang.NoClassDefFoundErrorµÄ´íÎó¡£
×îºó½éÉÜÒ»ÏÂʹÓÃEclipseÖÆ×÷jar°üµÄ¹ý³Ì°É£º
1. Ê×ÏÈÔÚEclipseÖдò¿ªÏîÄ¿£¬ ÓÒ¼üµã»÷ÏîÄ¿£¬Ñ¡Ôñ“Export”£»
2. Ñ¡ÔñJava/JAR file£¬Next£»
3. Select the resources to exportÖпÉÒÔÑ¡ÔñÄãÏëÒª°üº¬µÄÏîÄ¿Îļþ¼Ð£¬Ò»Ð©²»±ØÒªµÄÎļþ¼Ð¾ÍÎÞÐè·Å½øÈ¥ÁË£¬ÃâµÃÔö´ó¿Õ¼ä£»
ÕâÀïÓм¸¸öÑ¡Ï
* Export generated class files and resources ±íʾֻµ¼³öÉú³ÉµÄ.classÎļþºÍÆäËû×ÊÔ´Îļþ
* Export all output folders for checked projects ±íʾµ¼³öÑ¡ÖÐÏîÄ¿µÄËùÓÐÎļþ¼Ð
* Export java source file and resouces ±íʾµ¼³öµÄjar°üÖн«°üº¬ÄãµÄÔ´´úÂë*.java£¬Èç¹ûÄã²»Ïëй©Դ´úÂ룬ÄÇô¾Í²»ÒªÑ¡ÕâÏîÁË
* Export refactorings for checked projects °ÑһЩÖع¹µÄÐÅÏ¢ÎļþÒ²°üº¬½øÈ¥
ÔÚSelect the export destinationÖÐÑ¡Ôñµ¼³öµÄjarµÄ·¾¶£¬Next
4. ÏÂÒ»Ò³¿ÉÒÔÑ¡ÔñÊÇ·ñµ¼³öÄÇЩº¬Óо¯¸æwarning»òÕß´íÎóerrorsµÄ*.classÎļþ¡£Ò»°ã²»ÓÃÀíËû£¬Next
5. ÏÂÒ»¸öÒ³ÃæÀï¿ÉÒÔ¶ÔÏîÄ¿×öһЩÅäÖá£
* Generate the manifest fileÊÇϵͳ°ïÎÒÃÇ×Ô¶¯Éú³ÉMANIFEST.MFÎļþ£¬Èç¹ûÄãµÄÏîĿûÓÐÒýÓÃÆäËûclass-path£¬ÄÇ¿ÉÒÔÑ¡ÔñÕâÒ»Ïî¡£
* Use existing mainfest from workspace¡£ÕâÊÇ¿ÉÒÔÑ¡ÔñÎÒÃÇ×Ô¶¨ÒåµÄ.MFÎļþ£¬¸ñʽÈçÉÏËùд¡£
* Seal content¡£Òª·â×°Õû¸öjar»òÕßÖ¸¶¨µÄ°üpacket
* Main class¡£ÕâÀï¿ÉÒÔÑ¡ÔñÄãµÄ³ÌÐòÈë¿Ú£¬½«À´´ò°ü³öÀ´µÄjar¾ÍÊÇÄãÕâ¸öÈë¿ÚÀàµÄÖ´Ðнá¹û¡£
×îºóFinish£¬¸ã¶¨¡£
Ïà¹ØÎĵµ£º
×¢Ê͵ÄÔÔò
1¡¢ ×¢ÊÍÐÎʽͳһ
ÔÚÕû¸öÓ¦ÓóÌÐòÖУ¬Ê¹ÓþßÓÐÒ»ÖµıêµãºÍ½á¹¹µÄÑùʽÀ´¹¹Ôì×¢ÊÍ¡£Èç¹ûÔÚÆäËûÏîÄ¿×é·¢ÏÖËûÃǵÄ×¢Ê͹淶ÓëÕâ·ÝÎĵµ²»Í¬£¬°´ÕÕËûÃǵĹ淶д´úÂ룬²»ÒªÊÔͼÔڼȳɵĹ淶ϵͳÖÐÒýÈëеĹ淶¡£
2¡¢ ×¢Ê͵ļò½à
ÄÚÈÝÒª¼òµ¥¡¢Ã÷ÁË¡¢º¬Òå׼ȷ£¬·ÀÖ¹×¢Ê͵ĶàÒåÐÔ£¬´íÎóµÄ×¢ÊͲ»µ«ÎÞÒæ·´¶øÓÐ ......
ʵÏÖ²½Ö裺
1.×Ô¶¨ÒåÒ»¸öJavaÀ࣬¸ÃJavaÀàÖж¨ÒåÒ»¸ö·½·¨À´°üº¬ÐèÒª±»ÔËÐеĴúÂë¡£
2.¶¯Ì¬±àÒë¸Õ¸ÕÉú³ÉµÄJavaÔ´Â룬²»ÔÚ´ÅÅÌÉÏÉú³ÉÔ´Â룬¶øÊÇÖ±½Ó±àÒëÄÚ´æÖеÄJavaÔ´Âë¡£
3.¶¯Ì¬¼ÓÔظոմ´½¨±àÒëµÄJava¶þ½øÖÆÂ룬±àÒëºÃµÄJava¶þ½øÖÆÂë²»ÊÇÔÚ´ÅÅÌÉÏ£¬¶øÊÇ·ÅÔÚÄÚ´æÖУ¬²¢¶¨Òå×Ô¼ºµÄÀà¼ÓÔØÆ÷£¬¸ºÔð¼ÓÔØÄÚ´æÖеÄclassÎļþ¡£
......
ÔÚJavaÖУ¬µ±Ò»¸ö¶ÔÏó±»´´½¨Ê±£¬³ÉÔ±±äÁ¿µÄ³õʼ»¯¼°¹¹Ôì·½·¨µÄµ÷ÓÃ×ñÑÒÔÏÂ˳Ðò£º
1. ½«·ÖÅä¸ø¶ÔÏóµÄ´æ´¢¿Õ¼ä³õʼ»¯³É¶þ½øÖƵÄÁã¡£
2. µ÷ÓÃËùÓлùÀàµÄ¹¹Ôì·½·¨¡£Õâ¸ö²½Öè»á²»¶ÏµØ·´¸´µÝ¹éÏÂÈ¥£¬Ê×ÏÈÊǹ¹ÔìÕâÖÖ²ã´Î½á¹¹µÄ¸ù£¬È»ºóÊÇÏÂÒ»²ã×ÓÀ࣬µÈµÈ£¬Ö±µ½×îµ×²ãµÄ×ÓÀà¡£
3. °´ÕÕÉùÃ÷µÄ˳Ðòµ÷ÓóÉÔ±µÄ³õʼ»¯·½·¨¡£
4. µ÷ ......
JavaΪÊý¾Ý½á¹¹µÄÓ³É䶨ÒåÁËÒ»¸ö½Ó¿Újava.util.Map.ËüÓÐËĸöʵÏÖÀ࣬·Ö±ðÊÇHashMap, Hashtable,LinkedHashMapºÍTreeMapÖ÷ÒªÓÃÓÚ´æ´¢¼üÖµ¶Ô£¬¸ù¾Ý¼üµÃµ½Öµ£¬Òò´Ë²»ÔÊÐí¼üÖظ´£¬µ«ÔÊÐíÖµÖظ´¡£
HashMapÊÇÒ»¸ö×î³£ÓõÄMap£¬Ëü¸ù¾Ý¼üµÄHashCodeÖµ´æ´¢Êý¾Ý£¬¸ù¾Ý¼ü¿ÉÒÔÖ±½Ó»ñÈ¡ËüµÄÖµ£¬¾ßÓкܿìµÄ·ÃÎÊËٶȣ¬± ......
8ÖÖ»ù±¾Êý¾ÝÀàÐÍÓÐÏàÓ¦µÄ8ÖÖ°ü×°Àà(Wrapper)¶ÔÓ¦,·Ö±ðÊÇ:Character,Byte,Short,Integer,Long,Float,Double,Boolean.
Ìصã:
1.ÌṩÁËvalueOf(String)ÓÃÓÚ´Ó×Ö·û´®×ª»»¼°toString()ת»»³É×Ö·û´®
2.ͨ¹ýxxxxValue()·½·¨¿ÉÒԵõ½Ëù°ü×°µÄÖµ,ÈçInteger¶ÔÏóµÄintValue()·½·¨.
ʾÀý´úÂë:
public class DoubleAndString {
pu ......