public class swich { public static void main(String[] args){ int x = 10; //不满足且至少执行一次 do{ System.out.print("x"); x++; System.out.print("\n"); }while( x < 2 ); //不满足条件只执行符合的结果 while( x < 11 ) { System.out.print("x"); x++; System.out.print("\n"); } } }