Èý·ÖÖÓÀí½âJavaÖÐ×Ö·û´®£¨String£©µÄ´æ´¢ºÍ¸³ÖµÔÀí
¿ÉÄܺܶàjavaµÄ³õѧÕ߶ÔStringµÄ´æ´¢ºÍ¸³ÖµÓÐÃÔ»ó£¬ÒÔÏÂÊÇÒ»¸öºÜ¼òµ¥µÄ²âÊÔÓÃÀý£¬ÄãÖ»ÐèÒª»¨¼¸·ÖÖÓʱ¼ä±ã¿ÉÀí½â¡£
1.ÔÚ¿´Àý×Ó֮ǰ£¬È·±£ÄãÀí½âÒÔϼ¸¸öÊõÓ
Õ» £ºÓÉJVM·ÖÅäÇøÓò£¬ÓÃÓÚ±£´æÏß³ÌÖ´ÐеĶ¯×÷ºÍÊý¾ÝÒýÓá£Õ»ÊÇÒ»¸öÔËÐеĵ¥Î»£¬JavaÖÐÒ»¸öÏ߳̾ͻáÏàÓ¦ÓÐÒ»¸öÏß³ÌÕ»ÓëÖ®¶ÔÓ¦¡£
¶Ñ £ºÓÉJVM·ÖÅäµÄ£¬ÓÃÓÚ´æ´¢¶ÔÏóµÈÊý¾ÝµÄÇøÓò¡£
³£Á¿³Ø £ºÔÚ¶ÑÖзÖÅä³öÀ´µÄÒ»¿é´æ´¢ÇøÓò£¬ÓÃÓÚ´æ´¢ÏÔʽ µÄString£¬float»òÕßinteger.ÀýÈçString str="abc"; abcÕâ¸ö×Ö·û´®ÊÇÏÔʽÉùÃ÷£¬ËùÒÔ´æ´¢ÔÚ³£Á¿³Ø¡£
2.¿´Õâ¸öÀý×Ó£¬ÓÃJDK5+junit4.5дµÄÀý×Ó£¬Íêȫͨ¹ý²âÊÔ
Java´úÂë
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertSame;
import org.junit.Test;
/**
* @author Heis
*
*/
public class StringTest{
@Test
public void testTheSameReference1(){
String str1="abc";
String str2="abc";
String str3="ab"+"c";
String str4=new String(str2);
//str1ºÍstr2ÒýÓÃ×Ô³£Á¿³ØÀïµÄͬһ¸östring¶ÔÏó
assertSame(str1,str2);
//str3ͨ¹ý±àÒëÓÅ»¯£¬Óëstr1ÒýÓÃ×Ôͬһ¸ö¶ÔÏó
assertSame(str1,str3);
//str4ÒòΪÊÇÔÚ¶ÑÖÐÖØзÖÅäµÄÁíÒ»¸ö¶ÔÏó£¬ËùÒÔËüµÄÒýÓÃÓëstr1²»Í¬
asse
Ïà¹ØÎĵµ£º
Java NIO APIÏê½â
ÔÚJDK
1.4ÒÔÇ°£¬JavaµÄIO²Ù×÷¼¯ÖÐÔÚjava.ioÕâ¸ö°üÖУ¬ÊÇ»ùÓÚÁ÷µÄ×èÈû£¨blocking£©API¡£¶ÔÓÚ´ó¶àÊýÓ¦ÓÃÀ´Ëµ£¬ÕâÑùµÄAPIʹÓúܷ½
±ã£¬È»¶ø£¬Ò»Ð©¶ÔÐÔÄÜÒªÇó½Ï¸ßµÄÓ¦Óã¬ÓÈÆäÊÇ·þÎñ¶ËÓ¦Óã¬ÍùÍùÐèÒªÒ»¸ö¸üΪÓÐЧµÄ·½Ê½À´´¦ÀíIO¡£´ÓJDK 1.4Æð£¬NIO
API×÷Ϊһ¸ö»ùÓÚ»º³åÇø£¬²¢ÄÜÌṩ·Ç×èÈû(non-blo ......
import java.lang.reflect.Array;
public class ReflectionTest {
public static void main(String[] args) {
try {
Example obj = new Example();
j ......
Óà Groovy ±àд¸üÉٵĴúÂ룬Íê³É¸ü¶àµÄ¹¤×÷
¼¶±ð£º ³õ¼¶
Scott Davis , ´´Ê¼ÈË, ThirstyHead.com
2009 Äê 3 ÔÂ 09 ÈÕ
Groovy ר¼Ò Scott Davis ½«ÖØпªÊ¼×«Ð´ ʵս Groovy ϵÁÐÎÄÕ£¬¸ÃϵÁÐÎÄÕÂÓÚ 2006 ÄêÍ£Ö¹±àд¡£×÷Ϊ¿ªÆªÎÄÕ£¬±¾ÎĽ«½éÉÜ Groovy ×î½üµÄ·¢Õ¹ÒÔ¼° Groovy µ±Ç°µÄ״̬¡£È»ºóÁ˽ⴠ......
import java.net.InetAddress;
//±¾³ÌÐòʵÏÖÁË»ñÈ¡±¾µØIPµØÖ·
public class IP {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
InetAddress localHost;
InetAddress []ip;
try{
localHost=InetAddress.getLocalHost();
ip=InetAddr ......