public class A{ private static Integer n = 0; } public class B extends A implements Runnable { public void run(){ synchronized(n){ ++n; } } } public class C extends A implements Runnable { public void
sql语句写法: begin for i in 1 .. 100 loop insert into table_name values(....); end loop; commit; end; 例子: begin for i in 1 .. 100 loop insert into toilet values(i+1,null,'张三'); end loop; commit; end;