/**选择结构*/

public class Demo06{

    public static void main(String []args){

        // if...else...型

        String name = "张三";  //String 比较内容相等 equals

        if("张三".equals(name)){

            System.out.println("欢迎张三");

        }else{

            System.out.println("谢谢光临");

        }

        //  if...else if...else...型

        int i= 3;

        if(i<2){

            System.out.println("if");

        }else if(i<3){

            System.out.println("else if");

        }else{

            System.out.println("else");

        }

        //  switch case 型

        int month = 1;

        switch(month){

            case 1:

                System.out.println("春天");

                break;

            case 2:

                System.out.println("夏天");

                break;

            case 3:

                System.out.println("秋天");

                break;

            case 4:

                System.out.println("冬天");

                break;

            default:

                System.out.println("没有这个月份");

                break;

        }

    }

}