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Java ±éÀú Map

Map m = new HashMap();
for (Object o : map.keySet()){
map.get(o);
}

JDK1.4

Map map = new HashMap() ;

Iterator it = map.entrySet().iterator() ;
while (it.hasNext())
{
Map.Entry entry = (Map.Entry) it.next() ;
Object key = entry.getKey() ;
Object value = entry.getValue() ;
}


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Java reflection´úÂëʾÀý

package com.mywebtest.common;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
/**
 * Java reflection ·Ç³£ÓÐÓã¬ËüʹÀàºÍÊý¾Ý½á¹¹Äܰ´Ãû³Æ¶¯Ì¬¼ìË÷Ïà¹ØÐÅÏ¢£¬²¢ÔÊÐíÔÚÔËÐÐ× ......

javaÖÐʹÓÃbase64±àÂ룭£­£­£­

     base64±àÂëÔÚjavaÖÐÓкܺõÄÖ§³Ö£¬µ«ÐèÒªÏÂÔØjar°ü£¬ÀÁµÄÕÒjarÁË£¬ÓÚÊÇÕÒµ½ÁËÔ´Â룬ºÇºÇ£¬Õâ¸ö²»Å·³µÄ»°»¹¿ÉÒÔÑо¿ÏÂ
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public class Base64 {
    private static final byte[] encodingTable = {
          & ......

JAVAÅÅÐòËã·¨£¨·ÇÔ­´´£©


JAVAÅÅÐòËã·¨£¨·ÇÔ­´´£©
package Sort;
class Data {
 Comparable key;
 Object value;
 public Data() {
 }
 
 public Data(Data data){
   this.key=data.key;
   this.value=data.value;
  ......

Àí½âJava ClassLoader»úÖÆ

µ±JVM£¨JavaÐéÄâ»ú£©Æô¶¯Ê±£¬»áÐγÉÓÉÈý¸öÀà¼ÓÔØÆ÷×é³ÉµÄ³õʼÀà¼ÓÔØÆ÷²ã´Î½á¹¹£º
       bootstrap classloader
                |
       extension classloader
            &n ......

java¹¤³§Ä£Ê½

    java¹¤³§Ä£Ê½µÄѧϰ£¬³õÆÚµÄʱºòÔÚÍøÉϲéÁ˺ܶàÀý×Ó£¬×Ô¼ºÊ¼ÖÕÖ»Äܹ¹½¨¼òµ¥¹¤³§£¬ºóÀ´ÖÕÓÚÕÒµ½ÁËÏÂÃæÕâ·ÝÎĵµ²Å¶Ô¹¤³§Ä£Ê½ÓÐÁËÒ»¸öÈ«ÃæµÄÀí½â£¬²¢ÇÒΪ´ËÎĵµµÄ³éÏ󹤳§ÌṩÁËʵÀý£º
JAVA¹¤³§Ä£Ê½
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Ò»¡¢Òý×Ó
  ......
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