帮我看下这个代码 编译提示需要'{' 本人菜鸟 望高手解答

abstract class Student {

    private String name;



    public String getName() {

        return name;

    }



    public void setName(String name) {

        this.name = name;

    }



    public String getNo() {

        return no;

    }



    public void setNo(String no) {

        this.no = no;

    }



    private String no;

    public abstract void printlnfo();



    public Student() {

        no="20100701020xx";

        name="lx";

    }

    public void print() {

        System.out.println("name:" +this.getName());

        System.out.println("no:" +no);

    }

}



public class MaleStudent extends Student {

    private String gender;



    public MaleStudent(String gender) {

        super();

        this.gender=gender;

    }

    @Override

    public void printlnfo() {

        System.out.println("name:"+this.getName());

        System.out.println("no:+no");

        System.out.println("gender:+gender");

    }

    public static void main(String[] args) {

        MaleStudent m=new MaleStudent("man");

        m.printlnfo();

    }

}