DirectoryEntry entry = new DirectoryEntry("LDAP://GOOGLE.COM.TW:389", "userName", "password");
entry.RefreshCache();
@interface Student: NSObject {
NSString *iName;
NSString *iStudentID;
int age;
}
@property(nonatomic,copy) NSString *iName;
@property(nonatomic,copy) NSString *iStudentID;
@property(nonatomic,assign) int age;
@end
#import "student.h"
@implementation student
@synthesize iName,iStudentID,age;
- (void) dealloc {
[iName release];
[iStudentID release];
[super dealloc];
}
@end
NSMutableArray *arr = [[NSMutableArray alloc] initWithCapacity : 0];//array.retainCount = 1 NSString *str1 = [[NSString alloc] initWithString : @"A"];//str1.retainCount = 1 NSString *str2 = [[NSString alloc] initWithString : @"A"];//str2.retainCount = 1 [arr addObject : str1];//str1.retainCount = 2 [arr addObject : str2];//str2.retainCount = 2 [arr removeObject : str1];//str1.retainCount = 1 [arr release];//array.retainCount = 0;str2.retainCount = 1 //系統回收 array [str1 release];//str1.retainCount = 0 [str2 release];//str2.retainCount = 0 //系統回收str1&str2
int number = 0;//取值 char[] name = ['n','a','m','e']; char *str = name;//取址
$("#file_upload").bind('change',function(){});
$("#file_upload").live('change',function(){});
$('#file_upload').replaceWith('<input id="file_upload" name="file_upload" type="file">');
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <com.google.android.maps.MapView android:id="@+id/mView_Main" android:layout_width="fill_parent" android:layout_height="fill_parent" android:apiKey="你自己的key"> </com.google.android.maps.MapView> </LinearLayout>
@interface Test : NSObject {
NSData *iData;
}
@property(nonatomic,retain) NSData *iData;
@end
-(void) setIData : (NSData *) newData {
if(iData != newData){
[iData release];
iData = [newData retain];
}
}
-(NSData *) getIData {
return iData;
}
 |
| QR Code |
invalid command-line parameter: Files\android-sdk-windows\tools/emulator-arm.exe.
Hint: use '@foo' to launch a virtual device named 'foo'.
please use -help for more information
import java.util.Calendar;
public class main {
public static void main(String[] args) {
testStringBuilder();
}
public static void testStringBuilder() {
StringBuilder sBuilder = new StringBuilder();
System.out.println("1. string of new StringBuilder()");
if(sBuilder == null){
System.out.println("string:[is null]");
}else{
System.out.println("result:string:[" + sBuilder + "],length:[" + sBuilder.length() + "]");
}
StringBuilder sBuilder2 = new StringBuilder("");
System.out.println("2. string of new StringBuilder(\"\")");
if(sBuilder2 == null){
System.out.println("string:[is null]");
}else{
System.out.println("result:string:[" + sBuilder2 + "],length:[" + sBuilder2.length() + "]");
}
StringBuilder sBuilder3 = new StringBuilder();
String nullString = null;
sBuilder3.append(nullString);
System.out.println("3. string of new StringBuilder() append null");
if(sBuilder3 == null){
System.out.println("string:[is null]");
}else{
System.out.println("result:string:[" + sBuilder3 + "],length:[" + sBuilder3.length() + "]");
}
StringBuilder sBuilder4 = new StringBuilder("");
sBuilder4.append(nullString);
System.out.println("4. string of new StringBuilder(\"\") append null");
if(sBuilder4 == null){
System.out.println("string:[is null]");
}else{
System.out.println("result:string:[" + sBuilder4 + "],length:[" + sBuilder4.length() + "]");
}
}
 |
| 種花自己的測速網站 |
| 屬性 | 說明 |
| getter=method | 指定物件的get method |
| setter=method | 指定物件的set method |
| readonly | 指定物件為唯獨狀態 |
| readwrite | 指定物件為可讀寫狀態(預設) |
| assign | 物件的值根據帶入的值決定，不改變索引計數(預設) |
| copy | 複製物件的設定，索引計數為1，釋放舊的物件 |
| retain | 保持物件的設定，提高物件的索引計數，並釋放舊的物件 |
| nonatomic | 不鎖定物件(多執行緒的時候，資源會競爭) |
public Engine onLoadEngine(); public void onLoadResources(); public void onUnloadResources(); public Scene onLoadScene(); public void onLoadComplete(); public void onGamePaused(); public void onGameResumed();
Environment.getExternalStorageState()狀態有以下幾種：
Environment.getExternalStorageDirectory().getPath()
StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath()); // 未使用(單位：bytes) long sdFreeSize = stat.getAvailableBlocks() * stat.getBlockSize(); // 總容量(包含保留空間，單位：bytes) long sdTotalSize = stat.getFreeBlocks() * stat.getBlockSize(); // 已使用(單位：bytes) long sdUsedSize = sdTotalSize - sdFreeSize ;
SELECT column FROM table ORDER BY RAND()
SELECT column FROM table ORDER BY RANDOM() LIMIT 1
SELECT TOP 1 column FROM table ORDER BY NEWID()
SELECT column, RAND() as IDX FROM table ORDER BY IDX FETCH FIRST 1 ROWS ONLY
SELECT column FROM ( SELECT column FROM table ORDER BY dbms_random.value ) WHERE rownum = 1
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