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 public class Test {
 public static void main(String args[]) {
  int i;
  int j;
  for (i = 1; i <= 9; i++) {
   for (j = 1; j <= i; j++) {
    if (j * i <= 9)
     System.out.print(j + "*" + i + "=" + (j * i) + "  ");
    
    else
     System.out.print(j + "*" + i + "=" + (j * i) + " ");
   }
   System.out.println();
  }
  for (i = 1, j = 1; i <= 9 && j <= 9; j++) {
   if (j > i) {
    i++;
    System.out.println();
    j = 1;
   }
   if (j * i <= 9)
    System.out.print(j + "*" + i + "=" + (j * i) + "  ");
   
   else
    System.out.print(j + "*" + i + "=" + (j * i) + " ");
    
  }
 }
}
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 1¡¢length() ×Ö·û´®µÄ³¤¶È
¡¡¡¡Àý£ºchar chars[]={'a','b'.'c'};
¡¡¡¡¡¡¡¡String s=new String(chars);
¡¡¡¡¡¡¡¡int len=s.length();
2¡¢charAt() ½ØÈ¡Ò»¸ö×Ö·û
¡¡¡¡Àý£ºchar ch;
¡¡¡¡¡¡¡¡ch="abc".charAt(1); ·µ»Ø'b'
3¡¢getChars() ½ØÈ¡¶à¸ö×Ö·û
¡¡¡¡void getChars(int sourceStart,int sourceEnd,char tar ......

Java ±³¾°

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    ×î½üÒ»Äê¶àÀ´,ÔÚInternetÉϳöÏÖµÄÌØ±ðÎüÒýÈ˵Äʼþ¾ÍÊÇJavaÓïÑÔºÍÓÃJava±àдµÄä¯ÀÀÆ÷HotJava¡£
1991Äê,SUNMicroSystem¹«Ë¾µÄJameGosling¡¢BillJoeµÈÈË,ΪÔÚµçÊÓ¡¢¿ØÖÆ¿¾Ãæ°üÏäµÈ¼ÒÓÃÏû·ÑÀàµç×Ó²úÆ·ÉϽøÐн»»¥Ê½²Ù×÷¶ø¿ª·¢ÁËÒ»¸öÃûΪOakµÄÈí¼þ(¼´Ò»ÖÖÏðÊ÷µÄÃû×Ö),µ«µ±Ê±²¢Ã»ÓÐÒýÆðÈËÃǵ ......

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", Fon ......

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ÔÚ±àÒëandroid code ³öÏÖ°æ±¾²»¶ÔµÄÎÊÌ⣺
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You are attempting to build with the incorrect version
of java.
Your version is: java version "1.6.0_17".
The correct version is: 1.5.
Please follow the machine setup instructions at
http://source.android.com/download
ÍøÉÏÓÐÈËÌṩ½â¾ö·½·¨ÈçÏ ......
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