java ·ÖÆ»¹û
ÓÐ600¸öÆ»¹û£¬10¸öºÐ×Ó£¬ÒªÇó°Ñ600¸öÆ»¹û·Ö×°µ½10¸öºÐ×ÓÀï¡£Èç¹ûÓÐÈËÀ´ÂòÆ»¹ûËæ±ã˵³öÒ»¸öÊý£¬Ö±½ÓÄÃÕâЩºÐ×Ó×éװһϾͿÉÒÔ¸øËû²»Óòð·ÖºÐ×Ó¡£ÇëÎÊÕâ10¸öºÐ×ÓÓ¦¸Ã·Ö±ð×°¶àÉÙÆ»¹û£¿
´úÂëÈçÏÂ
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
int box[] = new int[10];
int count = 600;
int apple = 1;
for(int i=0;i<box.length-1;i++){
box[i] = apple;
apple = apple*2;
}
box[box.length-1] = count - apple + 1;
System.out.println("ÇëÊäÈëÄúÐèÒªµÄÊý×Ö£º");
Scanner sc = new Scanner(System.in);
int math = sc.nextInt();
String arr="";
if(math<2<<8){
arr = Integer.toBinaryString(math);
}else{
arr = 1+Integer.toBinaryString(math-89);
}
char[] chr = arr.toCharArray();
for(int i=0;i<chr.length;i++){
if("1".equals(chr[i]+"")){
System.out.print(chr.length-i+"ºÅ ");
}
}
}
}
Ïà¹ØÎĵµ£º
s = new String("xyz");´´½¨Á˼¸¸öString Object?Á½¸ö¶ÔÏó¡£
String s="ÄãºÃ";int i=3; s=i+s; Õâ¸ö±í´ïʽ¶ÔÂð?ÔÚjavaÖлáÌáʾÊý¾ÝÀàÐͲ»Æ¥Åä¡£ÒòΪstringÊÇÀà!ÕýÈ·×ö·¨: s+="3" »òÕß s+='3'»òÕß s+=(char)i;
ÎÒÃÇÒªÒýÈëÁíÍâÒ»ÖÖ´´½¨String¶ÔÏóµÄ·½Ê½µÄÌÖÂÛ——ÒýºÅÄÚ°üº¬Îı¾¡£ÕâÖÖ·½Ê½ÊÇStringÌØÓе쬲¢ÇÒË ......
¶¨Ò壺
GOF¡¶Éè¼ÆÄ£Ê½¡·Öиø×´Ì¬Ä£Ê½ÏµĶ¨ÒåΪ£ºÔÊÐíÒ»¸ö¶ÔÏóÔÚÆäÄÚ²¿×´Ì¬¸Ä±äʱ¸Ä±äËüµÄÐÐΪ¡£
ÏÈ¿´Ò»¸öÀý×Ó£º
package com.state;
public class KissingPrincess {
// ±ê־룬±êÖ¾ÊÇÇàÍÜ»¹ÊÇÍõ×Ó¡£
private boolean isFrog = true;
// ¸ù¾ÝisFrog½øÐв»Í¬µÄ²Ù×÷¡£
public void greet() {
if (isFrog)
......
1¡¢Java.utilµÄ¼¯ºÏÀàÖеÄÔªËØ±ØÐëÊǶÔÏ󻯵ģ¬ËûÃDz»ÄÜÊÇ»ù±¾ÀàÐÍ¡£Èç²»ÄÜÉùÃ÷Set<char>»òList<int>¡£µ«¶ÔList<Integer>£¬¿ÉÒÔÍùÀïÃæ¼ÓintÐÍÊý¾Ý£¬Ëü»áÓÃJavaµÄautoboxing»úÖÆ×Ô¶¯×ª»»³ÉInteger¶ÔÏó¡£
2¡¢²ÎÊý»¯ÀàÖеÄÀàÐͲÎÊý¿ÉÒÔÊÇÊý×éÀàÐÍ£¬ÈçMap< ......
import java.sql.*;
/*
* JAVAÁ¬½ÓACCESS£¬SQL Server,MySQL,OracleÊý¾Ý¿â
*
* */
public class JDBC {
public static void main(String[] args)throws Exception {
Connection conn=null;
//====Á¬½ÓACCESSÊý¾Ý¿â ......
×î½ü¿´µ½Ò»¸öÍøÓѹØÓÚ==ºÍequals ×öµÄ×ܽᣬ·ÖÏíÒ»ÏÂ
javaÖÐequals·½·¨ºÍ“==”µÄÇø±ð£º
equals ·½·¨ÊÇ java.lang.Object ÀàµÄ·½·¨¡£
ÓÐÁ½ÖÖÓ÷¨ËµÃ÷£º
£¨1£©¶ÔÓÚ×Ö·û´®±äÁ¿À´Ëµ£¬Ê¹ÓÓ==”ºÍ“equals()”·½·¨±È½Ï×Ö·û´®Ê±£¬Æä±È½Ï·½·¨²»Í¬¡£
“==”±È½ÏÁ½¸ö±äÁ¿±¾ÉíµÄÖµ£¬¼ ......