ÓÃJava ÉèÖõĶ¨Î»´òÓ¡×÷Òµ
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.standard.OrientationRequested;
public class Main {
public static void main(String[] argv) throws Exception {
// Set up the attribute set
PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
aset.add(OrientationRequested.PORTRAIT);
// aset.add(OrientationRequested.LANDSCAPE);
}
}
Ïà¹ØÎĵµ£º
¶ÔÓÚѧϰstaticÎÒÃÇÏÈÀ´¿´Á½¸öÀý×Ó£º
//Example 1 Tst.java£¬no main() method
package com.blogchina.qb2049;
public class Tst
{
static { System.out.println("111111"); }
}
ÔËÐнá¹ûΪ: 111111
Exception in thread "main" java.lang.NoSuchMethodError: main
ͬÑùµÄµÀÀí¿´µÚ¶þ ......
1 JDK5.0°üÀ¨µÄµ÷ÊÔ¹¤¾ß
ÎÒÃÇÔÚÕâÀï¶ÔJDK5.0µÄµ÷ÊÔ¹¤¾ß×ö´óÖµĸÅÄîÐԵĽéÉÜ£¬È»ºóÏ£Íûͨ¹ý½éÉÜÎÒ×Ô¼ºÔÚʵ¼Ê¹¤×÷ÖÐʹÓÃÕâЩ¹¤¾ß½â¾öÎÊÌâµÄʵÀýÀ´Èôó¼Ò¶ÔÕâЩ¹¤¾ßÓиüÉîÈëµÄÁ˽⡣
¡¡JDK5.0ÀïÃæ¼ÓÈëÁËjstack, jconsole, jinfo, jmap, jdb, jstat, jps, ÏÂÃæ¶ÔÕâЩ¹¤¾ß×ö¼òµ¥½éÉÜ£º
¡¡jstack -- Èç¹ûjava³Ì ......
Ò»¡¢ÔËÐÐclassÎļþ
Ö´Ðдømain·½·¨µÄclassÎļþ£¬ÃüÁîÐÐΪ£º
java <CLASSÎļþÃû>
×¢Ò⣺CLASSÎļþÃû²»Òª´øÎļþºó׺.class
ÀýÈ磺
java Test
Èç¹ûÖ´ÐеÄclassÎļþÊÇ´ø°üµÄ£¬¼´ÔÚÀàÎļþÖÐʹÓÃÁË£º
package <°üÃû>
ÄÇÓ¦¸ÃÔÚ°üµÄ»ù·¾¶ÏÂÖ´ÐУ¬ÃüÁîÐÐΪ£º
java <°üÃû>.CLASSÎļþ ......
Java±à³ÌÄÇЩʶù52—·½·¨ÉùÃ÷
µÚÆßÕÂ ·½·¨
·½·¨µÄÀ´Ô´
·½·¨µÄ¸ÅÄîÀ´Ô´ÓÚÊýѧÉϵĺ¯Êý£¬ÔÚÊýѧÖУ¬µ±Êý¾Ý¾ßÓÐÒ»¶¨µÄ¹æÂÉʱ£¬¾ÍÊÇÓÃÒ»¸öº¯ÊýÀ´´úÂë¸ÃÊý×ֵĹæÂÉ£¬ÀýÈçf£¨n£©=nÔò´ú±í1¡¢2¡¢3¡¢……ÕâÑùµÄÒ»¸öÊýÁС£ÔÚÊýѧÉÏnÊDzÎÊý£¬¶ÔÓÚÈ·¶¨µÄnÖµÖ»ÓÐÒ»¸öf£¨n£©µÄÖµºÍËü¶ÔÓ¦
·½·¨ÊÇÒ»×éΪÁËʵÏÖÌØ¶¨¹¦Ä ......