Ò»µÀjavaÌâËù½ÒʾµÄÔÀí
¿´µ½Ò»µÀjavaÌ⣬¸Ð¾õºÜ²»´í,ÎÒÔÚÔÀ´µÄ°æ±¾ÉÏÔö¼ÓÁËЩ´úÂ룬һÆðÀ´¿´¿´ÏÂÃæµÄ´úÂ뽫Êä³öʲô
class Father{
int i,j;
Father(){
add(1);
}
void add(int v){
i+=v;
j+=v;
}
void print(){
System.out.println("i:="+i);
System.out.println("j:="+j);
}
}
class Child extends Father{
int i;
Child(){
add(2);
}
void add(int v){
i+=2*v;
j+=2*v;
}
void _print(){
System.out.println("ci:="+i);
}
}
public class Test {
public static void main(String[] args) {
Child c =new Child();
c.add(8);
c.print();
c._print();
}
}
Êä³ö½á¹û£º
i=0;
j=22;
ci=22;
·ÖÎöһϣºÕâÊÇÒ»¸ö¼Ì³Ð½á¹¹£¬child¼Ì³ÐÁËFatherµÄ j ºÍ print ()¡£
ץסÁ½¸öÖØµã
£º
1£¬ÔÚÀà±»±àÒëʱ×÷ÁËÐ©Ê²Ã´ÄØ
Father Child
------- --------
©°©¤©¤> j <©¤©¤©¤©¤ @ i
©¦ ------- --------
©¦©¤©¤> j <©¤©¤©¤©¤ @ j <©¤©´
©¦ ------- -------- ©¦
©¦ add() add() ©¤©È
©¦ ------- ------- ©¦
©¸©¤©¤print() <©¤ @ print() ©¦
------- ------- ©¦
©°©¤©¤ _print() ©¦
©¦ -------- &
Ïà¹ØÎĵµ£º
ÏÂÃæÕâÆªÎÄÕÂÊÇ̨ÍåÖøÃûJavaÂÛ̳“Javaworld”µÄÒ»¸ö×ÊÉî°æÖ÷дµÄÒ»·â¶ÔJavaÐÂÊÖµÄÐÅ£¬Ï£ÍûС×é³ÉÔ±×Ðϸ¿´Ï Äã»áѧµ½ºÜ¶àµÄ¡¢¡¢¡¢¡¢
親愛µÄ java ÐÂÊÖ們 :
ºÜ¸ß興Äã們願Òâ來這裡¹²Í¬學習,
Java 這個語ÑÔ, Ò ......
Ï̳߳ØÀàΪ java.util.concurrent.ThreadPoolExecutor£¬³£Óù¹Ôì·½·¨Îª£º ThreadPoolExecutor(int corePoolSize, int maximumPoolSize,
long keepAliveTime, TimeUnit unit,
BlockingQueue<Runnable> workQueue,
RejectedExecutionHandler handler) corePoolSize£º Ï̳߳ØÎ¬»¤Ï̵߳Ä×îÉÙÊýÁ¿ ......
JavaµÄÊý¾Ý½á¹¹ÓÐÄÄЩ£¿MapÓëSetµÄ±¾ÖÊÇø±ðÊÇʲô£¿
·ÖÎö£ºJava³£¼ûµÄÊý¾Ý½á¹¹ÓÐCollectionºÍMap£¬ÆäÖÐCollection½Ó¿ÚϰüÀ¨ListºÍSet½Ó¿Ú£¬ÆäÏÂÓÖÓжà¸öʵÏÖÀàÈçListÏÂÓÐArrayList¡¢LinkedListºÍVectorµÈʵÏÖÀ࣬SetÏÂÓÐHashSet¡¢LinkedSetµÈʵÏÖÀàºÍSortedSet½Ó¿Ú£¬HashSetÏÂÓÐLinkedHashSet×ÓÀ࣬SortedSet½Ó¿ÚÏÂÓÐTre ......
ÒªÏëѧºÃJava£¬Ê×ÏÈÒªÖªµÀJavaµÄ´óÖ·ÖÀà¡£ÎÒÃÇÖªµÀ£¬×Ô´ÓSunÍÆ³öJavaÒÔÀ´£¬¾ÍÁ¦Í¼Ê¹Ö®ÎÞËù²»°ü£¬ËùÒÔJava·¢Õ¹µ½ÏÖÔÚ£¬°´Ó¦ÓÃÀ´·ÖÖ÷Òª ·ÖΪÈý´ó¿é£ºJ2SE,J2MEºÍ J2EE,ÕâÒ²¾ÍÊÇSun ONE(Open Net Environment)Ìåϵ¡£J2SE¾ÍÊÇJava2µÄ±ê×¼°æ£¬Ö÷ÒªÓÃÓÚ×ÀÃæÓ¦ÓÃÈí¼þµÄ±à³Ì£»J2MEÖ÷ÒªÓ¦ÓÃÓÚǶÈëÊÇϵͳ¿ª·¢£¬ÈçÊÖ»úºÍPDAµÄ±à ³Ì£» ......
public class Test{
public static void main(String args[]){
System.out.println("This is a test program.");
}
}
½«ÉÏÃæµÄÕâ¶Î³ÌÐò±£´æÎªÎļþÃûΪTest.javaµÄÎļþ¡£
È»ºó´ò¿ªÃüÁîÌáʾ·û´°¿Ú£¬cdµ½ÄãµÄTest.javaËùÔÚĿ¼£¬È»ºó¼üÈëÏÂÃæµÄÃüÁî
javac Test.java
³ö´í:
Àà Test Êǹ«¹²µÄ£¬Ó¦ ......