µÚÒ»¸öjavaµÄApplet
×î½ü¿ªÊ¼ÔÚ¿´java£¬¶ÔAppletÕâ½Ú±È½Ï¸ÐÐËȤ£¬¸ÄÁ˸ÄÊéÉϵĴúÂ룬Ȩµ±Áô¸öÓ¡¼Ç
import java.awt.*;
import java.applet.*;
public class HelloApplet extends Applet
{
Font f1 = new Font("Times New Roman", Font.PLAIN, 12);
Font f2 = new Font("ËÎÌå", Font.BOLD, 24);
Font f3 = new Font("ºÚÌå", Font.BOLD, 36);
Color c1 = new Color(255,0,0);
Color c2 = new Color(0,255,0);
Color c3 = new Color(0,0,255);
public void paint(Graphics g)
{
g.setFont(f1);
g.setColor(c1);
g.drawString("Hello, world!",20,30);
g.setFont(f2);
g.setColor(c2);
g.drawString("My name is Zhou Xiaojian",20,60);
g.setFont(f3);
g.setColor(c3);
g.drawString("This is my first Applet",20,120);
}
}
<HTML>
<TITLE>HelloApplet</TITLE>
<APPLET CODE="HelloApplet.class" WIDTH=600 HEIGHT=400>
</APPLET>
</HTML>
Ïà¹ØÎĵµ£º
Javaѧϰ´ÓÈëÃŵ½¾«Í¨
Ò»¡¢ JDK (Java Development Kit)
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......
¹ØÓÚJavaÕ»Óë¶ÑµÄ˼¿¼
1. Õ»(stack)Óë¶Ñ(heap)¶¼ÊÇJavaÓÃÀ´ÔÚRamÖдæ·ÅÊý¾ÝµÄµØ·½¡£ÓëC++²»Í¬£¬Java×Ô¶¯¹ÜÀíÕ»ºÍ¶Ñ£¬³ÌÐòÔ±²»ÄÜÖ±½ÓµØÉèÖÃÕ»»ò¶Ñ¡£
¡¡¡¡2. Õ»µÄÓÅÊÆÊÇ£¬´æÈ¡ËٶȱȶÑÒª¿ì£¬½ö´ÎÓÚÖ±½ÓλÓÚCPUÖеļĴæÆ÷¡£µ«È±µãÊÇ£¬´æÔÚÕ»ÖеÄÊý¾Ý´óСÓëÉú´æÆÚ±ØÐëÊÇÈ·¶¨µÄ£¬È±·¦Áé»îÐÔ¡£ÁíÍ⣬ջÊý¾Ý¿ÉÒÔ¹²Ïí£¬Ïê¼ûµÚ3µ ......
ͨË×Àí½âÏòÉÏתÐÍ£º
¾ÍÊÇ×ÓÀàתÐͳɸ¸Àà¡£
class A{}
class B extends A { }
A b = new B();
Õâ¸ö¾ÍÊÇÏòÉÏתÐÍ¡£
ÏòÉÏתÐÍ¿ÉÒÔÏñÏÂÃæÕâÌõÓï¾äÕâô¼òµ¥:
Shape s =new Circle();
ÕâÀ´´½¨Ò»¸öCircle¶ÔÏ ......
1, ±£Ö¤Ḭ̈߳²È«µÄÈýÖÖ·½·¨: a, ²»Òª¿çÏ̷߳ÃÎʹ²Ïí±äÁ¿b, ʹ¹²Ïí±äÁ¿ÊÇfinalÀàÐ͵Äc, ½«¹²Ïí±äÁ¿µÄ²Ù×÷¼ÓÉÏͬ²½
2, Ò»¿ªÊ¼¾Í½«ÀàÉè¼Æ³ÉḬ̈߳²È«µÄ, ±ÈÔÚºóÆÚÖØÐÂÐÞ¸´Ëü,¸üÈÝÒ×.
3, ±àд¶àÏ̳߳ÌÐò, Ê×Ïȱ£Ö¤ËüÊÇÕýÈ·µÄ, Æä´ÎÔÙ¿¼ÂÇÐÔÄÜ.
4, ÎÞ ......
1£¬Java3D ×÷Ϊsun¹«Ë¾½ÏÔçÍÆ³öµÄÒ»Ïî3d¼¼Êõ£¬ÊÇÒ»Öָ߶ȷâ×°µÄapi£¬¹¹½¨ÔÚopenglºÍdirect3dÖ®ÉÏ£¬¿ÉÒÔ˵ÊÇ×îÓÐÃûµÄjavaµÄ3d¼¼Êõ¡£ÓÉÓÚÖÖÖÖÔÒò£¨apiÉè¼Æ£¬ÃæÏòµÄÓû§²»Ã÷È·£©£¬java3dһֱûÓа취Á÷ÐУ¬²»¾Ãǰjava3dµÄÍŶÓÐû²¼ÔÝÍ£¶Ôjava3dй¦ÄܵĿª·¢£¬×ª¶øÎªJavaFX¿ª·¢3d äÖȾÒýÇæ¡£Í¬Ê±sunµÄÁíÒ»¸öÏîÄ¿ project wonder ......