关于#java的问题，请各位专家解答！

编写学生类 Student，属性有学号（int id）、姓名（String name）、语文成绩（double chinese）、数学成绩（double math）、总分（double total）、平局分(double aver)。总分、平局是计算出来的。类的方法包括构造方法、计算总分、平局分、及set和get属性方法。并编写测试类进行测试。
package bhvgg;

public class DENO {

private int id;
 private String name;
 private double chinese;
 private double math;
 private double total;
 private double aver;
 
 public DENO() {

}

 public DENO(int id,String name,double chinese,double math) {
     this.id= id;
     this.name=name;
     this.chinese=chinese;
     this.math=math;        
 }
 
 @Override
 public String toString() {
     return "Student{"+
       "id="+id+
       ",name=' " + name + '\''+
       ",math=" +math +
       ",total=" +total +
       ",aver=" + aver +
       "";}
       public int getId() {
           return id;
       }
       public void setId(int id) {
           this.id =id;
       }
       public String getName() {
           return name;
       }   
           public void SETName(String name) {
             this.name = name;
      }
          public double getChinese() {
              return chinese;
       }
                public void setChinese(double chinese) {
                   this.chinese =chinese;
      }
                public double getMath() {
                    return math;
                }
                public void setMath(double math) {
                    this.math = math;
                }
                public double getTotal() {
                    return total;
                }
                
                public void setTotal(double total) {
                    this.total = total;
                }
                public double getAver() {
                    return aver;
                }
                public void setAver(double aver) {
                    this.aver = aver;
                }
                public void sum() {
                    this.total = this.chinese+this.math;
                }
                public void ave() {
                    this.aver = (this.chinese+this.math)/2;
                    
                   
                }
               
            
public static void main(String[] args) {
    // TODO Auto-generated method stub

}

}

结果运行不出来。

连语言都分不清楚