Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Java SE6µ÷ÓÃJava±àÒëÆ÷µÄÁ½ÖÖз½·¨

ÔںܶàJavaÓ¦ÓÃÖÐÐèÒªÔÚ³ÌÐòÖе÷ÓÃJava±àÒëÆ÷À´±àÒëºÍÔËÐС£µ«ÔÚÔçÆڵİ汾ÖУ¨Java SE5¼°ÒÔÇ°°æ±¾£©ÖÐÖ»ÄÜͨ¹ýtools.jarÖеÄcom.sun.tools.javac°üÀ´µ÷ÓÃJava±àÒëÆ÷£¬µ«ÓÉÓÚtools.jar²»ÊDZê×¼µÄJava¿â£¬ÔÚʹÓÃʱ±ØÐëÒªÉèÖÃÕâ¸öjarµÄ·¾¶¡£¶øÔÚJava SE6ÖÐΪÎÒÃÇÌṩÁ˱ê×¼µÄ°üÀ´²Ù×÷Java±àÒëÆ÷£¬Õâ¾ÍÊÇjavax.tools°ü¡£Ê¹ÓÃÕâ¸ö°ü£¬ÎÒÃÇ¿ÉÒÔ²»Óý«jarÎļþ·¾¶Ìí¼Óµ½classpathÖÐÁË¡£
¡¡¡¡Ò»¡¢Ê¹ÓÃJavaCompiler½Ó¿ÚÀ´±àÒëJavaÔ´³ÌÐò
¡¡¡¡Ê¹ÓÃJava APIÀ´±àÒëJavaÔ´³ÌÐòÓкܶ෽·¨£¬ÏÖÔÚÈÃÎÒÃÇÀ´¿´Ò»ÖÖ×î¼òµ¥µÄ·½·¨£¬Í¨¹ýJavaCompiler½øÐбàÒë¡£
¡¡¡¡ÎÒÃÇ¿ÉÒÔͨ¹ýToolProviderÀàµÄ¾²Ì¬·½·¨getSystemJavaCompilerÀ´µÃµ½Ò»¸öJavaCompiler½Ó¿ÚµÄʵÀý¡£
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
¡¡¡¡JavaCompilerÖÐ×îºËÐĵķ½·¨ÊÇrun¡£Í¨¹ýÕâ¸ö·½·¨¿ÉÒÔ±àÒëjavaÔ´³ÌÐò¡£Õâ¸ö·½·¨ÓÐ3¸ö¹Ì¶¨²ÎÊýºÍ1¸ö¿É±ä²ÎÊý£¨¿É±ä²ÎÊýÊÇ´ÓJave SE5¿ªÊ¼ÌṩµÄÒ»¸öеIJÎÊýÀàÐÍ£¬ÓÃtype… argu±íʾ£©¡£Ç°3¸ö²ÎÊý·Ö±ðÓÃÀ´Îªjava±àÒëÆ÷Ìṩ²ÎÊý¡¢µÃµ½Java±àÒëÆ÷µÄÊä³öÐÅÏ¢ÒÔ¼°½ÓÊÕ±àÒëÆ÷µÄ´íÎóÐÅÏ¢£¬ºóÃæµÄ¿É±ä²ÎÊý¿ÉÒÔ´«ÈëÒ»¸ö»ò¶à¸öJavaÔ´³ÌÐòÎļþ¡£Èç¹ûrun±àÒë³É¹¦£¬·µ»Ø0¡£
int run(InputStream in, OutputStream out, OutputStream err, String... arguments)
¡¡¡¡Èç¹ûÇ°3¸ö²ÎÊý´«ÈëµÄÊÇnull£¬ÄÇôrun·½·¨½«ÒÔ±ê×¼µÄÊäÈë¡¢Êä³ö´úÌ棬¼´System.in¡¢System.outºÍSystem.err¡£Èç¹ûÎÒÃÇÒª±àÒëÒ»¸ötest.javaÎļþ£¬²¢½«Ê¹Óñê×¼ÊäÈëÊä³ö£¬runµÄʹÓ÷½·¨ÈçÏ£º
int results = tool.run(null, null, null, "test.java");
¡¡¡¡ÏÂÃæÊÇʹÓÃJavaCompilerµÄÍêÕû´úÂ룺
import java.io.*;
import javax.tools.*;
public class test_compilerapi
{
¡¡public static void main(String args[]) throws IOException
¡¡{
¡¡¡¡JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
¡¡¡¡int results = compiler.run(null, null, null, "test.java");
¡¡¡¡System.out.println((results == 0)?"±àÒë³É¹¦":"±àÒëʧ°Ü");
¡¡¡¡// ÔÚ³ÌÐòÖÐÔËÐÐtest
¡¡¡¡Runtime run = Runtime.getRuntime();
¡¡¡¡Process p = run.exec("java test");
¡¡¡¡BufferedInputStream in = new BufferedInputStream(p.getInputStream());
¡¡¡¡BufferedReader br = new BufferedReader(new InputStreamReader(in));
¡¡¡¡String s;
¡¡¡¡while ((s = br.readLi


Ïà¹ØÎĵµ£º

¹ØÓÚJavaÖÐ×Ô¶¨Òå°üµÄ´´½¨

ÎÒÔÚѧϰthinking in Java4 µÄʱºò£¬ÔÚ´´½¨×Ô¶¨Òå°üµÄʱºò£¬Åöµ½Á˺ܶà´íÎó£¬ÈÃÎÒÓôÃÆÁ˼¸Ì죬ͨ¹ýÔÚÍøÉϵÄ×ÊÁÏËÑË÷£¬°Ñ°üµÄ´´½¨¹ý³Ì¸ø´ó¼ÒÏêϸÁгöÀ´¡£
ÎÒÃÇÒÔthinking in Java4ÖеÄÀý×ÓΪÀý
´´½¨Á½¸öÀàVectorºÍList¡£½«±àÒëºóµÄVector.classºÍList.classÎļþ·ÅÔÚ°ünet.mindview.simpleÏÂ(¸Ã°üλÓÚc:\DOC\JavaT).
//Vec ......

JavaºÍC++λÔËËã¶Ô±È

ΪÁËʵÏÖÁ½¸öÊý×Ö½øÐн»»»£¬ÎÒÃÇͨ³£¿ÉÒÔÀûÓÃλÔËËãÀ´ÊµÏÖ
C++³ÌÐò     swap(int a  ,int b){a^=b^=a^=b;}
JAVA³ÌÐò    swap(int a, int b){  a^=b;b^=a;a^=b; }»òÕß{ b^=(a^=b) ; a^=b;}
Èç¹ûJAVAÓÃC++µÄʵÏÖ·½Ê½Ôò»áµÃµ½ bµÃµ½ÁËaµÄÖµ£¬µ«ÊÇaÏÖÔÚµÄֵȴ² ......

Java heap space³ö´íÔ­Òò[ת]

ʹÓÃJava³ÌÐò´ÓÊý¾Ý¿âÖвéѯ´óÁ¿µÄÊý¾ÝʱÈÝÒ׳öÏÖÒì³£:
java.lang.OutOfMemoryError: Java heap space
ÔÚJVMÖÐÈç¹û98£¥µÄʱ¼äÊÇÓÃÓÚGCÇÒ¿ÉÓÃµÄ Heap size ²»×ã2£¥µÄʱºò½«Å׳ö´ËÒì³£ÐÅÏ¢¡£
»¹ÓÐʹÓÃjxl¶ÁдexcelÎļþʱ£¬Í¬Ê±¶ÁÈëËùÓмǼ£¬Ò²ÈÝÒ׳öÏÖÕâ¸öÎÊÌâ¡£
JVM¶ÑµÄÉèÖÃÊÇÖ¸java³ÌÐòÔËÐйý³ÌÖÐJVM¿ÉÒÔµ÷ÅäʹÓõÄÄÚ ......

J2EE·Ö²ãÉè¼ÆÊÇJavaÆóÒµÓ¦ÓõÄ×î»ù±¾µÄÉè¼Æ˼Ïë¡£


 
´Ó×î³£¹æµÄ·Ö²ã½á¹¹À´Ëµ£¬ÏµÍ³²ã´Î´ÓÉϵ½ÏÂÒÀ´ÎΪ£º
 
±íÏֲ㣺Ö÷ÒªÊÇ¿Í»§¶ËµÄչʾ¡£
 
·þÎñ²ã£ºÖ±½ÓΪ¿Í»§¶ËÌṩµÄ·þÎñ»ò¹¦ÄÜ¡£Ò²ÊÇϵͳËùÄܶÔÍâÌṩµÄ¹¦ÄÜ¡£
 
ÁìÓò²ã£ºÏµÍ³ÄÚµÄÁìÓò»î¶¯¡£
 
DAO²ã£ºÊý¾Ý·ÃÎʶÔÏó£¬Í¨¹ýÁìÓòʵÌå¶ÔÏóÀ´²Ù×÷Êý¾Ý¿â¡£
 
ÆäÖÐÓÐЩָµ¼Ô­Ôò£º
& ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ