Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

JAVA ¶ÔÊ÷ÐνṹÖÐͼƬµÄÐÞ¸Ä

package graphic;
import javax.swing.ImageIcon;
import javax.swing.JTree;
import java.awt.Component;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultMutableTreeNode;
/**
*
* @author bianzhiqi
* ¾ßÌå·½·¨µÄʹÓò鿴DefaultTreeCellRendererµÄÎĵµ
*/
public class MyRenderer extends DefaultTreeCellRenderer{
private ImageIcon leafIcon;
private ImageIcon midIcon;

public MyRenderer(ImageIcon leafIcon,ImageIcon midIcon)
{
this.leafIcon=leafIcon;
this.midIcon=midIcon;
}

public Component getTreeCellRendererComponent(
JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus) {
super.getTreeCellRendererComponent(
tree, value, sel,
expanded, leaf, row,
hasFocus);
DefaultMutableTreeNode node=(DefaultMutableTreeNode)value;
if(leaf && leafIcon!=null) setIcon(leafIcon);
else if((isKeyword(node)||isSpecial(node)) && midIcon!=null) setIcon(midIcon);
else setIcon(null);
return this;
}

protected boolean isKeyword(DefaultMutableTreeNode node)
{
String value=node.toString();
if(value.equals("int") || value.equals("real")||value.equals("while")||
value.equals("write")||value.equals("if")||value.equals("else")||
value.equals("read") ||value.equals("else if")
)
return true;
else return false;
}
protected boolean isSpecial(DefaultMutableTreeNode node){
String value=node.toString();
if(value.equals("<")||value.equals("<>")||value.equals("=")||value.equals("=="))
return true;
else return false;
}
}


Ïà¹ØÎĵµ£º

javaÖÐÖ´ÐÐÍⲿÃüÁî

ÔÚjavaÖпÉÒÔͨ¹ýRuntime.getRuntime().exec(cmd)À´Ö´ÐÐÍⲿÃüÁÎұȽϳ£ÓõÄÊǵ÷ÓÃshell½Å±¾À´Íê³ÉijЩ¹¤×÷£¬Ò²¿ÉÒÔÖ±½ÓÖ´ÐÐÒ»¸öos µÄÃüÁ±È½Ïµ÷ÓÃimagemagickÀ´Íê³ÉͼƬµÄһЩ²Ù×÷£¬ÆäÖÐÐèҪעÒâµÄÓÐÁ½µã£¬1ÊÇ×îºÃ´øÉÏÃüÁîµÄÍêÕû·¾¶,·ñÔòÃüÁî¿ÉÄܲ»»á±»Ö´ÐУ¬¶øÇÒҲûÓÐÈκα¨´íµÄÐÅÏ¢Êä³ö£¬2ÌØ±ðҪעÒâ¿Õ¸ñ£¬±ÈÈçÎÄ ......

java¸÷ÖÖ×Ö·û´®¸ñʽ»¯

1¡¢ÈÕÆÚ¸ñʽ»¯
String tim = "2009-12-29";
String str = (new java.text.SimpleDateFormat("yyyyÄêMMÔÂddÈÕ")).format((new java.text.SimpleDateFormat("yyyy-MM-dd")).parse(tim));
·µ»Ø£º2009Äê12ÔÂ29ÈÕ
String now = (new java.text.SimpleDateFormat("yyyy-MM-dd")).format(new java.util.Date());
·µ»Øµ±Ç°Ê±¼ä ......

ÔõÑù²ÅÄÜÌá¸ßJAVAµÄÐÔÄÜ?

Ìá¸ßJAVAµÄÐÔÄÜ£¬Ò»°ã¿¼ÂÇÈçϵÄËĸöÖ÷Òª·½Ã棺
£¨1£© ³ÌÐòÉè¼ÆµÄ·½·¨ºÍģʽ
Ò»¸öÁ¼ºÃµÄÉè¼ÆÄÜÌá¸ß³ÌÐòµÄÐÔÄÜ£¬ÕâÒ»µã²»½öÊÊÓÃÓÚJAVA£¬Ò²ÊÊÓÃÒ²Èκεıà³ÌÓïÑÔ¡£ÒòΪËü³ä·ÖÀûÓÃÁ˸÷ÖÖ×ÊÔ´£¬ÈçÄڴ棬CPU,¸ßËÙ»º´æ£¬¶ÔÏó»º³å³Ø¼°¶àỊ̈߳¬´Ó¶øÉè¼Æ³ö¸ßÐÔÄܺͿÉÉìËõÐÔÇ¿µÄϵͳ¡£
µ±È»£¬ÎªÁËÌá¸ß³ÌÐòµÄÐÔÄܶø¸Ä±äÔ­À´µÄÉè¼ÆÊÇ ......

JavaÃæÊÔ¾­µäÊÔÌâ¼°´ð°¸

µÚÒ»£¬Ì¸Ì¸final, finally, finalizeµÄÇø±ð¡£ ¡¡¡¡
final—ÐÞÊηû£¨¹Ø¼ü×Ö£©Èç¹ûÒ»¸öÀà±»ÉùÃ÷Ϊfinal£¬Òâζ×ÅËü²»ÄÜÔÙÅÉÉú³öеÄ×ÓÀ࣬²»ÄÜ×÷Ϊ¸¸Àà±»¼Ì³Ð¡£Òò´ËÒ»¸öÀ಻Äܼȱ»ÉùÃ÷Ϊ
abstractµÄ£¬ÓÖ±»ÉùÃ÷ΪfinalµÄ¡£½«±äÁ¿»ò·½·¨ÉùÃ÷Ϊfinal£¬¿ÉÒÔ±£Ö¤ËüÃÇÔÚʹÓÃÖв»±»¸Ä±ä¡£±»ÉùÃ÷ΪfinalµÄ±äÁ¿±ØÐëÔÚÉùÃ÷ʱ¸ø¶¨ ......

̸ÂÛ Java ÐÔÄÜÓÅ»¯


Java ʹµÃ¸´ÔÓÓ¦ÓõĿª·¢±äµÃÏà¶Ô¼òµ¥£¬ºÁÎÞÒÉÎÊ£¬ËüµÄÕâÖÖÒ×ÓÃÐÔ¶ÔJavaµÄ´ó·¶Î§Á÷Ðй¦²»¿Éû¡£È»¶ø£¬ÕâÖÖÒ×ÓÃÐÔʵ¼ÊÉÏÊÇÒ»°ÑË«Èн£¡£Ò»¸öÉè¼ÆÁ¼ºÃµÄ Java³ÌÐò£¬ÐÔÄܱíÏÖÍùÍù²»ÈçÒ»¸öͬÑùÉè¼ÆÁ¼ºÃµÄC++³ÌÐò¡£ÔÚJava³ÌÐòÖУ¬ÐÔÄÜÎÊÌâµÄ´ó²¿·ÖÔ­Òò²¢²»ÔÚÓÚJavaÓïÑÔ£¬¶øÊÇÔÚÓÚ³ÌÐò±¾Éí¡£Ñø³ÉºÃµÄ´úÂë±àдϰ¹ß·Ç³£ÖØÒª£¬±ÈÈçÕ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ