java 正则匹配空格字符串 正则表达式截取字符串 需求:从一堆sql中取出某些特定字符串: 比如配置的sql语句为:"company_code = @cc and project_id = @pid ; update t set a = @aa,b=@bb,c=@cd,ttt=@ttt;update t2 set d=@bb"; 我要拿出所有的以@开头的作为变量,并且去重,则如下玩: ps:其中正则匹配空格是 “\s+” public class Test { public stat
java输出双引号 直接看例子 //输出双引号 public class Test { public static void main(String[] args) { System.out.println("\"\""); //利用转义字符 } } //输出单引号 直接写当引号 System.out.println("''");
import java.util.Scanner; public class Main{ public static void main(String[] args){ Scanner in = new Scanner(System.in); String s = in.nextLine(); CodeLength(s); } public static void CodeLength(String s){ String [] str = s.split(" "); int lengt
public class Test { public void index() { String strWords = "Hello World My First Unit Test"; String[] words_Array = strWords.split(" "); Map<String,Integer> words_Map=new HashMap<String, Integer>(); int arrLength = words_A