JavaѧϰʰÒÅ2
»°ÌâÊÇÓÉÈçϵÄÊÂÇéÒý³öµÄ£º
public class StringTest {
public static void main(String[] args) {
String str1 = new String("abc");
String str2 = "abc";
if (str1 == str2) {
System.out.println("str1 == str2");
} else {
System.out.println("str1 != str2");
}
String str3 = "abc";
if (str2 == str3) {
System.out.println("str2 == str3");
} else {
System.out.println("str2 != str3");
}
str1 = str1.intern();
if (str1 == str2) {
System.out.println("str1 == str2");
} else {
System.out.println("str1 != str2");
}
String str4 = new String("abc");
str4 = str4.intern();
if (str1 == str4) {
System.out.println("str1 == str4");
} else {
System.out.println("str1 != str4");
}
}
}
Õâ¶Î³ÌÐòµÄÊä³öÊÇʲô£¿
´ð°¸£º
str1 != str2
str2 == str3
str1 == str2
str1 == str
Ïà¹ØÎĵµ£º
´úÂëÈçÏ£º
1 String command = " cmd /c C:/Program Files/MySQL/MySQL Server 5.0/bin>mysqldump -h localhost -u root -p aijia > E:/aijia.dmp " ;
2 try {
3 Process process& ......
tomcatÆô¶¯web·þÎñµÄʱºò×ÜÊÇ»áÓÐ8СʱµÄʱ²î,
×ÁÄ¥Á˺þÃ,×î¼òµ¥µÄ°ì·¨¾ÍÊÇ
ÕÒµ½Îļþ¼Ðjdk1.6.0_07\jre\lib\zi\Etc
ÕâÀï±ß¶¼ÊÇÒ»Ð©Ê±ÇøÎļþGTM+1,GTM+2,GTM+3....
±¸·ÝÒ»·ÝEtc
¿½±´N·ÝGTM+8Îļþ(ÖйúµÄÊ±ÇøÊÇGTM+8)
°ÑGMT+8ÎļþÃû¸Ä³ÉGTM+1,GTM+2,GTM+3....
¸²¸ÇµôÔÀ´µÄEtcÀï±ßµÄÎļþ
ÖØÆôtomcatÎÊÌâ½â¾ö ......
Ò»¡¢Ê²Ã´ÊÇJavaÐéÄâ»ú
µ±Äã̸µ½JavaÐéÄâ»úʱ£¬Äã¿ÉÄÜÊÇÖ¸£º
1¡¢³éÏóµÄJavaÐéÄâ»ú¹æ·¶
2¡¢Ò»¸ö¾ßÌåµÄJavaÐéÄâ»úʵÏÖ
3¡¢Ò»¸öÔËÐеÄJavaÐéÄâ»úʵÀý
¶þ¡¢JavaÐéÄâ»úµÄÉúÃüÖÜÆÚ
Ò»¸öÔËÐÐ ......
¼òµ¥µÄ˵µ¥Àý¾ÍÊÇ Ö»ÄÜÓÐÒ»¸öʵÀý£¬ËùÒԵط½Óõ½µÄʵÀý¶¼ÊÇͬһ¸ö¡£
¾ÍºÃÏñ¼ÒÈ˳Է¹£¬×À×ÓÊǵ¥ÀýµÄ£¬´ó¼ÒÓõÄÊÇͬһ¸ö¡£¶øÍëÊǶàÀýµÄ£¬Ã¿È˶¼ÓÐ×Ô¼¸µÄ¡£ ÏÂÃæÊǾßÌåµÄÀý×Ó£º
Javaģʽ֮µ¥Àýģʽ£º
µ¥Àýģʽȷ±£Ò»¸öÀàÖ»ÓÐÒ»¸öʵÀý£¬×ÔÐÐÌṩÕâ¸öʵÀý²¢ÏòÕû¸öÏµÍ ......
JAVA³ÌÐòÔ±ÃæÊÔÖ®¿û»¨±¦µä
1¡¢ÃæÏò¶ÔÏóµÄÌØÕ÷ÓÐÄÄЩ·½Ãæ
1.³éÏ󣺳éÏó¾ÍÊǺöÂÔÒ»¸öÖ÷ÌâÖÐÓ뵱ǰĿ±êÎ޹صÄÄÇЩ·½Ã棬ÒÔ±ã¸ü³ä·ÖµØ×¢ÒâÓ뵱ǰĿ±êÓйصķ½Ãæ¡£³éÏó²¢²»´òËãÁ˽âÈ«²¿ÎÊÌ⣬¶øÖ»ÊÇÑ¡ÔñÆäÖеÄÒ»²¿·Ö£¬ÔÝʱ²»Óò¿·Öϸ½Ú¡£³éÏó°üÀ¨Á½¸ö·½Ã棬һÊǹý³Ì³éÏ󣬶þÊÇÊý¾Ý³éÏó¡£
2.¼Ì³Ð£º¼Ì³ÐÊÇÒ»ÖÖÁª½áÀàµÄ²ã´ÎÄ£ ......