The constructor Student(int, String, int, int, int, String) is undefined

来源:8-6 Java 中的构造方法

weibo_少年L的奇幻微博_03995891

2016-12-11 12:27

package lz;


import java.util.Scanner;

class Student{

int Number;

String Name;

float Eng_score;

float Math_score;

float Comp_score;

float Sum_score;

public Student(){

Number=0;

Name="asdf";

Eng_score=0;

Math_score=0;

Comp_score=0;

Sum_score=0;

}

public Student(int NewNumber,String NewName,float NewEng_score,float NewMath_score,float NewComp_score,float NewSum_score)

{

Number=NewNumber;

Name=NewName;

Eng_score=NewEng_score;

Math_score=NewMath_score;

Comp_score=NewComp_score;

Sum_score=NewSum_score;

}

public int getNumber(){

return Number;

}

public void setNumber(int Number){

this.Number =Number;

}

public String getName(){

return Name;

}

public void setName(String Name){

this.Name=Name;

}

public float getEng_score(){

return Eng_score;

}


public void setEng_score( float Eng_score){

this.Eng_score=Eng_score;

}

public float getMath_score(){

return Math_score;

}

public void setMath_score( float Math_score){

this.Math_score=Math_score;

}

public void setComp_score( float Comp_score){

this.Comp_score=Comp_score;

}

public float getSum_score()

{

return Sum_score;

}

public void setSum_score( float Sum_score)

{

this.Sum_score = Sum_score;

}


public float Sum(){

return(this.Eng_score+this.Math_score+this.Comp_score);

}

public float testScore() {  

  return(this.Sum_score/3);       

public String toString(){

return("学号:"+Number+"姓名:"+Name+"英语:"+Eng_score+"数学:"+Math_score+"计算机:"+Comp_score+"总分:"+Sum_score+"评测成绩:"+testScore()+"\n");

}

public boolean equals(Object x){

Student a=(Student)x;

if (this.Number==a.getNumber())

return true;

return false;

}

}


class StudentXW extends Student{

String responsibility;

public StudentXW(){

super();

responsibility=" ";

}

public StudentXW(int NewNumber,String NewName,int NewEng_score,int NewMath_score,int NewComp_score,int NewSum_score,String Newresponsibility){

super(NewNumber,NewName,NewEng_score,NewMath_score,NewComp_score,Newresponsibility);

responsibility=Newresponsibility;

}

public String getresponsibility(){

return responsibility;

}

public void setresponsibility(String responsibility){

this.responsibility = responsibility;

}

public float testScore() {  

   return(Sum_score/3+3); 

}

public String toString(){

return("学号:"+Number+"姓名:"+Name+"英语:"+Eng_score+"数学:"+Math_score+"计算机:"+Comp_score+"总分:"+Sum_score+"评测成绩:"+testScore()+"职位:"+responsibility+"\n");

}

}

class StudentBZ extends Student{

String responsibility;

public StudentBZ(){

super();

responsibility=" ";

}

public StudentBZ(int NewNumber,String NewName,float NewEng_score,float NewMath_score,float NewComp_score,float NewSum_score,String Newresponsibility){

super(NewNumber,NewName,NewEng_score,NewMath_score,NewComp_score,Newresponsibility);

responsibility=Newresponsibility;

}

public String getresponsibility(){

return responsibility;

}

public void setresponsibility(String responsibility){

this.responsibility = responsibility;

}

public float testScore() {  

   return(Sum_score/3+5);      

}

public String toString(){

return("学号:"+Number+"姓名:"+Name+"英语:"+Eng_score+"数学:"+Math_score+"计算机:"+Comp_score+"总分:"+Sum_score+"评测成绩:"+testScore()+"职位:"+responsibility+"\n");

}

}


public class Show7{

public static void main(String args[]){

Student[] Stu=new Student[3];

Scanner scn= new Scanner(System.in);

System.out.println(Stu.length);

for (int i = 0; i <3; i++) {

System.out.println("\n"+"输入第"+(i+1)+"个学生的数据");

System.out.print("学号:");

int NewNumber=scn.nextInt();

System.out.print("姓名:");

String NewName=scn.next();

System.out.print("英语:");

float NewEng_score=scn.nextInt();

System.out.print("数学");

float NewMath_score=scn.nextInt();

System.out.print("计算机");

float NewComp_score=scn.nextInt();

System.out.print("职位");

String Newresponsibility=scn.next();

Stu[i]=new Student(NewNumber,NewName,NewEng_score,NewMath_score,NewComp_score,Newresponsibility);  

}

for(int i=0;i<3;i++){

System.out.print(Stu[i].toString());


}

}

}


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2回答

  • skyking524
    2016-12-24 11:44:10
    //注意你每个传的参数的类型
    	public Student(int NewNumber, String NewName, float NewEng_score, float NewMath_score, float NewComp_score,
    			float NewSum_score) {
    		Number = NewNumber;
    		Name = NewName;
    		Eng_score = NewEng_score;
    		Math_score = NewMath_score;
    		Comp_score = NewComp_score;
    		Sum_score = NewSum_score;
    	}
    
    	
    	public StudentXW(int NewNumber, String NewName, int NewEng_score, int NewMath_score, int NewComp_score,
    			int NewSum_score, String Newresponsibility) {
    		//与父类构造方法参数类型的对比,提示:类型需要一一对应
    		super(NewNumber, NewName, NewEng_score, NewMath_score, NewComp_score, Newresponsibility);
    		responsibility = Newresponsibility;
    	}


  • weibo_少年L的奇幻微博_03995891
    2016-12-11 12:29:25

    super(NewNumber,NewName,NewEng_score,NewMath_score,NewComp_score,Newresponsibility);

    Stu[i]=new Student(NewNumber,NewName,NewEng_score,NewMath_score,NewComp_score,Newresponsibility); 

    这两行显示

    The constructor Student(int, String, int, int, int, String) is undefined

    怎么回事啊??、

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