java ÄÚ²¿Àà×ܽá
Ò»¡¢ ¶¨Òå
·ÅÔÚÒ»¸öÀàµÄÄÚ²¿µÄÀàÎÒÃǾͽÐÄÚ²¿Àà¡£
¶þ¡¢ ×÷ÓÃ
1.ÄÚ²¿Àà¿ÉÒԺܺõÄʵÏÖÒþ²Ø
Ò»°ãµÄ·ÇÄÚ²¿À࣬ÊDz»ÔÊÐíÓÐ private ÓëprotectedȨÏ޵쬵«ÄÚ²¿Àà¿ÉÒÔ
2£®ÄÚ²¿ÀàÓµÓÐÍâΧÀàµÄËùÓÐÔªËØµÄ·ÃÎÊȨÏÞ
3.¿ÉÊÇʵÏÖ¶àÖØ¼Ì³Ð
4.¿ÉÒÔ±ÜÃâÐ޸ĽӿڶøÊµÏÖͬһ¸öÀàÖÐÁ½ÖÖͬÃû·½·¨µÄµ÷Óá£
Èý¡¢ Àý×Ó
1.ʵÏÖÒþ²Ø
ƽʱÎÒÃǶÔÀàµÄ·ÃÎÊȨÏÞ£¬¶¼ÊÇͨ¹ýÀàÇ°ÃæµÄ·ÃÎÊÐÞÊηûÀ´ÏÞÖÆµÄ£¬Ò»°ãµÄ·ÇÄÚ²¿À࣬ÊDz»ÔÊÐíÓÐ private ÓëprotectedȨÏ޵쬵«ÄÚ²¿Àà¿ÉÒÔ£¬ËùÒÔÎÒÃÇÄÜͨ¹ýÄÚ²¿ÀàÀ´Òþ²ØÎÒÃǵÄÐÅÏ¢¡£¿ÉÒÔ¿´ÏÂÃæµÄÀý×Ó
½Ó¿Ú
package insidecategory;
public interface Incrementable
{
void increment();
}
¾ßÌåÀà
package insidecategory;
public class Example {
private class InsideClass implements InterfaceTest
{
public void test()
{
System.out.println("ÕâÊÇÒ»¸ö²âÊÔ");
}
}
public InterfaceTest getIn()
{
return new InsideClass();
}
}
ÉÏÃæ¼Ó´ÖµÄ²¿·ÖÊÇÄÚ²¿À࣬·ÃÎÊÐÞÊηûÊÇprivate
¿Í»§¶Ë³ÌÐò
package insidecategory;
public class TestExample {
public static void main(String args[])
{
Example a=new Example();
InterfaceTest a1=a.getIn();
a1.test();
}
}
¼Ó´ÖµÄÄDz¿·Ö¾ÍÊǿͻ§¶Ëµ÷ÓõĴúÂ룬´ÓÕâ¶Î´úÂëÀïÃæÎÒÖ»ÖªµÀExampleµÄ
getIn()·½·¨ÄÜ·µ»ØÒ»¸öInterfaceTest ʵÀýµ«ÎÒ²¢²»ÖªµÀÕâ¸öʵÀýÊÇÕâôʵÏֵġ£¶øÇÒÓÉÓÚInsideClass ÊÇprivateµÄ£¬ËùÒÔÎÒÃÇÈç¹û²»¿´´úÂëµÄ»°¸ù±¾¿´²»µ½Õâ¸ö¾ßÌåÀàµÄÃû×Ö£¬ËùÒÔ˵Ëü¿ÉÒԺܺõÄʵÏÖÒþ²Ø¡£
2.¿ÉÒÔÎÞÌõ¼þµØ·ÃÎÊÍâΧÀàµÄËùÓÐÔªËØ
package insidecategory;
public class TagBean {
private String name="liutao";
private class InTest
 
Ïà¹ØÎĵµ£º
Ôڳɹ¦ÊµÏÖJavaµ÷ÓÃC++Ö®ºó£¬½ÓÏÂÀ´Ïëµ½ÄÜ·ñͨ¹ýJNAʵÏÖJavaµ÷ÓÃFortran£¬½ñÌìÊÔÑéÁËһϣ¬»¹ÊDZȽÏÈÝÒ׵ġ£
ÍøÉÏÓÐÒ»¸öJavaµ÷ÓÃF95µÄÀý×Ó£¬µ«ÊÇÎÒ¿¼ÂDz»½öҪʵÏÖF95µÄµ÷Ó㬻¹ÒªÊµÏÖF77µÄµ÷Óã¬ËùÒÔ·ÑÁËһЩÖÜÕÛ¡£
ÎÊÌâµÄ¹Ø¼üÔÚÓÚF77Ϊ¹ý³ÌÃû×Ô¶¯Ìí¼ÓÁËÒ»¸öβ²¿µÄÏ»®Ïߣ¬ËùÒÔsub1Õâ¸ö¹ý³Ì£¬µ½JavaÒ»¶Ë£¬¾Í±ä³ÉÁËsub1_£¬ ......
ÓÃjpa²»Äܽ¨±í£¬sqlÓï¾äÊǶԵ쬲»¹ý¾ÍÊDz»Äܽ¨£¬Í¬ÑùµÄsql£¬ÔÚÏÂÃæµÄjdbcÖоͿÉÒÔ£¬¿ÉÄÜÊÇ¿ò¼ÜµÄÏÞÖÆ£¬Ï£Íû¸ßÈËÖ¸µã
import java.net.URL;
import java.sql.*;
public class Create {
public Create() {
}
public static void main(String[] args){
String url = "jdbc:oracle:thin:@10.0.1.3:1521:SDCDB" ......
ClassLoaderÒ»¸ö¾³£³öÏÖÓÖÈúܶàÈËÍû¶øÈ´²½µÄ´Ê£¬±¾ÎĽ«ÊÔͼÒÔ×îdzÏÔÒ×¶®µÄ·½Ê½À´½²½â ClassLoader£¬Ï£ÍûÄܶԲ»Á˽â¸Ã»úÖÆµÄÅóÓÑÆðµ½Ò»µãµã×÷Óá£
ÒªÉîÈëÁ˽âClassLoader£¬Ê×ÏȾÍÒªÖªµÀClassLoaderÊÇÓÃÀ´¸ÉʲôµÄ£¬¹ËÃû˼Ò壬Ëü¾ÍÊÇÓÃÀ´¼ÓÔØClassÎļþµ½JVM£¬ÒÔ¹©³ÌÐòʹÓõġ£ÎÒÃÇÖªµÀ£¬java³ÌÐò¿ÉÒÔ¶¯Ì¬¼ÓÔØÀඨÒå£ ......
ѹËõÎļþ´úÂ룺
import java.io.*;
import java.util.zip.*;//ZipOutputStreamÕâ¸öÁ÷ÔÚÕâÀï
public class ZipOutputStreamTest
{
public static void main(String[] args) throws Exception
{
File f = new File("C:\\aaa.csv");
FileInputStream fis = new FileInputStream(f);
B ......