public class IfTest04{
    public static void main(String[] args){

        boolean sex = true;

        if(sex){
            System.out.println("男");
        }else{
            System.out.println("女");
        }

        //---------------------------------------
        sex = false;
        if(sex) System.out.println("男"); else System.out.println("女");

        //----------------------------------

        /*
        if(sex)
            System.out.println("男");
            System.out.println("呵呵");
        else
            System.out.println("女");
*/
        //以上程序错误在else没有匹配的if，else以上没有语法错误

    }
}