類類forName()方法 (Class class forName() method) forName() method is available in java.lang package. forName()方法在java.lang包中可用。 forName() method is used to return the class object for the Class with the given class_name. forName()方法用于返回具有給…
setlenient日歷類setLenient()方法 (Calendar Class setLenient() method) setLenient() method is available in java.util package. setLenient()方法在java.util包中可用。 setLenient() method is used to set or unset lenient status of date or time interpretations. s…
有時,希望除去某些記錄或更改它們的內容。DELETE 和 UPDATE 語句令我們能做到這一點。用update修改記錄UPDATE tbl_name SET 要更改的列WHERE 要更新的記錄這里的 WHERE 子句是可選的,因此如果不指定的話,表中的每個記錄都被更新。例如&#…
小練習的題目:
1、讀取一張圖,分解RGB三個通道
/************練習1**********************/
int main()
{Mat img1 imread("D:\\opencv_picture_test\\miku2.jpg",2|4); //灰度圖if (img1.empty()){printf("Could not find the imag…
1.改變圖片大小 -(UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize
{// Create a graphics image contextUIGraphicsBeginImageContext(newSize);// Tell the old image to draw in this new context, with the desired// new size[image drawInRect:CG…
BufferedReader類skip()方法 (BufferedReader Class skip() method) skip() method is available in java.io package. skip()方法在java.io包中可用。 skip() method is used to skip the given number of bytes of characters (n_bytes_of_char) from this BufferedReader. s…
1、將Master和Slave服務器都設置為read-onlymysql>SET global.read_onlyON;2、將Master與Slave服務器都停下來service mysql stop3、開啟GTIDs開啟GTIDs需要在master和slave服務器上都配置gtid-mode,log-bin,log-slave-updates,enforce-gtid-consistency(在MySQL 5.6.9之前是…