程序流程控制（续）：

    选择结构

       switch语句        

        格式：

         Switch(表达式)

                {

              case取值1：

                             执行语句；

                             break;

              case取值2：

                             执行语句；

                             break;

                             ……

                             default:

                  执行语句；

                             break;

                                    }

                牛刀小试1：

                    

        package test.myeclipse;

        publicclass test1 {

       

              publicstaticvoid main(String[] args) {

                 int x=3;

                 switch(x)

                 {

                   case 1:

                     System.out.println('1');

                     break;

                   case 2:

                     System.out.println('2');

                     break;

                   case 3:

                     System.out.println('3');

                     break;

                  default:

                     System.out.print("error");

                     break;

       

      

                  }

 

               }

 

}

运行结果：3


牛刀小试2：  


        package test.myeclipse;

           publicclass test1 {

             publicstaticvoid main(String[] args) {

               int x=3;

               switch(x)

               {

                 case 1:

                   System.out.println('1');

                   break;

                 case 2:

                   System.out.println('2');

                   break;

                 case 5:

                   System.out.println('3');

                   break;

                default:

                   System.out.print("error");

                   break;

       

      

               }

 

              }

 

          }

               运行结果：error


未完待续！