Cannot resolve symbol?

[Seral1969]

Hi, I'm new to Java...

I've been trying to get one of my professor's examples to work...

He says that the code is fine, but I keep getting 4 "cannot resolve symbol" errors when I try to compile the ShowStudent.jav a file...

The code for the Student class and ShowStudent program are listed below...

PLEASE HELP!!!

// Student.java
// creates a class to store info about a student
 
class Student
{
    // the private data members
    private int IDnumber;
    private int hours;
    private int points;
 
    // constructor added in last part of project
    Student()
    {
        IDnumber = 77375;
        points = 12;
        hours = 3;
    }
    // end of constructor
 
    // the public get and set methods
    public void setIDnumber(int number)
    {
        IDnumber = number;
    }
 
 
    public int getPoints()
    {
        return points;
    }
 
    // methods to display the fields
    public void showIDnumber()
    {
        System.out.println("ID Number is: " + IDnumber);
    }
 
    public void showHours()
    {
        System.out.println("Credit Hours: " + hours);
    }
 
    public void showPoints()
    {
        System.out.println("Points Earned: " + points);
    }
 
    public double getGradePoint()
    {
        return (double)points / hours;
    }
 
}
 
 
 
// ShowStudent.java
// client to test the Student class
 
class ShowStudent
{
    public static void main (String args[])
    {
        student pupil = new student();
 
 
        pupil.showIDnumber();
        pupil.showPoints();
        pupil.showHours();
        System.out.println("The grade point average of the studnet created by constructor is "
            + pupil.getGradePoint()+"\n\n");
 
        Student s2 = new Student();
        s2.setIDnumber(12345);
        s2.setPoints(66);
        s2.setHours(20);
        s2.showIDnumber();
        s2.showPoints();
        s2.showHours();
        System.out.println("The grade point average of another student is "
            + s2.getGradePoint()+"\n");
 
    }
}

[Seral1969]

I've been compiling the Student.java file first...

I'll try compile ShowStudent.jav a first...

Thanks anyway...

[Seral1969]

Here's what happens when I compile the files...



02/17/2008 01:13 AM <DIR> .
02/17/2008 01:13 AM <DIR> ..
02/17/2008 01:13 AM 754 ShowStudent.jav a
02/16/2008 06:20 PM 885 Student.java
2 File(s) 1,639 bytes
3 Dir(s) 109,830,705,152 bytes free

C:\Error>javac Student.java

C:\Error>java Student
Exception in thread "main" java.lang.NoCla ssDefFoundError : Student
Caused by: java.lang.Class NotFoundExcepti on: Student
at java.net.URLCla ssLoader$1.run( Unknown Source)
at java.security.A ccessController .doPrivileged(N ative Method)
at java.net.URLCla ssLoader.findCl ass(Unknown Source)
at java.lang.Class Loader.loadClas s(Unknown Source)
at sun.misc.Launch er$AppClassLoad er.loadClass(Un known Source)
at java.lang.Class Loader.loadClas s(Unknown Source)
at java.lang.Class Loader.loadClas sInternal(Unkno wn Source)

C:\Error>javac ShowStudent.jav a
ShowStudent.jav a:8: cannot find symbol
symbol : class Student
location: class ShowStudent
Student pupil = new Student();// 2 cannot resolve sybmol... points to 'S' in Student
^
ShowStudent.jav a:8: cannot find symbol
symbol : class Student
location: class ShowStudent
Student pupil = new Student();// 2 cannot resolve sybmol... points to 'S' in Student
^
ShowStudent.jav a:17: cannot find symbol
symbol : class Student
location: class ShowStudent
Student s2 = new Student();// 2 cannot resolve sybmol points to 'S in Student
^
ShowStudent.jav a:17: cannot find symbol
symbol : class Student
location: class ShowStudent
Student s2 = new Student();// 2 cannot resolve sybmol points to 'S in Student
^
4 errors

C:\Error>java ShowStudent
Exception in thread "main" java.lang.NoCla ssDefFoundError : ShowStudent
Caused by: java.lang.Class NotFoundExcepti on: ShowStudent
at java.net.URLCla ssLoader$1.run( Unknown Source)
at java.security.A ccessController .doPrivileged(N ative Method)
at java.net.URLCla ssLoader.findCl ass(Unknown Source)
at java.lang.Class Loader.loadClas s(Unknown Source)
at sun.misc.Launch er$AppClassLoad er.loadClass(Un known Source)
at java.lang.Class Loader.loadClas s(Unknown Source)
at java.lang.Class Loader.loadClas sInternal(Unkno wn Source)

C:\Error>

[Laharl]

Looks to me like this folder isn't in your classpath.

[gaya3]

Hi, I'm new to Java...

I've been trying to get one of my professor's examples to work...

He says that the code is fine, but I keep getting 4 "cannot resolve symbol" errors when I try to compile the ShowStudent.jav a file...

The code for the Student class and ShowStudent program are listed below...

PLEASE HELP!!!

// Student.java
// creates a class to store info about a student
 
class Student
{
    // the private data members
    private int IDnumber;
    private int hours;
    private int points;
 
    // constructor added in last part of project
    Student()
    {
        IDnumber = 77375;
        points = 12;
        hours = 3;
    }
    // end of constructor
 
    // the public get and set methods
    public void setIDnumber(int number)
    {
        IDnumber = number;
    }
 
 
    public int getPoints()
    {
        return points;
    }
 
    // methods to display the fields
    public void showIDnumber()
    {
        System.out.println("ID Number is: " + IDnumber);
    }
 
    public void showHours()
    {
        System.out.println("Credit Hours: " + hours);
    }
 
    public void showPoints()
    {
        System.out.println("Points Earned: " + points);
    }
 
    public double getGradePoint()
    {
        return (double)points / hours;
    }
 
}
 
 
 
// ShowStudent.java
// client to test the Student class
 
class ShowStudent
{
    public static void main (String args[])
    {
        student pupil = new student();
 
 
        pupil.showIDnumber();
        pupil.showPoints();
        pupil.showHours();
        System.out.println("The grade point average of the studnet created by constructor is "
            + pupil.getGradePoint()+"\n\n");
 
        Student s2 = new Student();
        s2.setIDnumber(12345);
        s2.setPoints(66);
        s2.setHours(20);
        s2.showIDnumber();
        s2.showPoints();
        s2.showHours();
        System.out.println("The grade point average of another student is "
            + s2.getGradePoint()+"\n");
 
    }
}

Hi,
What i have observed is in"Student" file u dont have setter method for "Points" & "Hours".. but u were trying to set those variable at "ShowStuden t" class..
Even this causes "cannot resolve" problem

-Hamsa

[sukatoa]

Hi, I'm new to Java...

I've been trying to get one of my professor's examples to work...

He says that the code is fine, but I keep getting 4 "cannot resolve symbol" errors when I try to compile the ShowStudent.jav a file...

The code for the Student class and ShowStudent program are listed below...

PLEASE HELP!!!

Are you sure of your code?

Maybe you forgot this,

at line 62, student must be Student
No such method as setPoints() in Student class
No such method as setHour() in Student class

make the class where the main method is to public...

tell us the result?

[JosAH]

This is a simple classpath problem. The javac compiler and the java virtual machine
don't know where to look for the class file Student after it started running the
other class. Simply add the classpath variable to them like this:

javac -cp . *.java 
...
java -cp . ShowStudent
 

The first line compiles both java files and sets the classpath to the current
directory (it reads: minus-c-p-space-dot). The last line runs your class given the
same classpath value.

kind regards,

Jos