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# Compilation errors, help with using constructors

Posted on 2004-03-22

I made a class called Complex which holds 3 methods. Then i created another file called complextest

I'm trying to invoke the methods in complex through complextest but getting errors in the complextest

I'm not sure what I'm doing wrong or what I need to do to resolve this problem.

here is the code for complex

public class Complex

{

public Complex()

{

}

public void add(float w, float x, float y, float z)

{

float a = w + y;

float b = x + z;

System.out.println(a + " + " + b + "i");

}

public void subtract(float w, float x, float y, float z)

{

float a = w - y;

float b = x - z;

System.out.println(a + " + " + b + "i");

}

public void printComplex(float w, float x, float y, float z)

{

System.out.print( "(" + w + "," + x + ")");

System.out.println(" (" + y + "," + z + ")");

}

}

here is the code for complextest

import javax.swing.JOptionPane;

import java.lang.String;

public class Complextest {

public static void main(String args[])

{

String I, I2; //user input for the imagionary parts

String R, R2; //user input for the real parts

float real, real2; //to be used for calculations

float imag, imag2; //to be used for calculations

//recieve input from user

R = JOptionPane.showInputDialog("Enter the real part of the first complex num.");

I = JOptionPane.showInputDialog("Enter the imagionary part of the first complex num.");

R2 = JOptionPane.showInputDialog("Enter the real part of the second complex num.");

I2 = JOptionPane.showInputDialog("Enter the imagionary part of the second complex num.");

//convert string input into float to be used for calculations

real = Float.parseFloat(R);

real2 = Float.parseFloat(R2);

imag = Float.parseFloat(I);

imag2 = Float.parseFloat(I2);

Complex complex = new Complex(R, I, R2, I2);

Complex.add(real, imag, real2, imag2);

Complex.subtract(real, imag, real2, imag2);

Complex.printComplex(real, imag, real2, imag2);

/*method calls

add(real, imag, real2, imag2);

subtract(real, imag, real2, imag2);

printComplex(real, imag, real2, imag2);*/

}

}

and here is the errors that I'm receiving:

Complextest.java [33:1] cannot resolve symbol

symbol : class Complex

location: class Complextest

Complex complex = new Complex(R, I, R2, I2);

^

Complextest.java [33:1] cannot resolve symbol

symbol : class Complex

location: class Complextest

Complex complex = new Complex(R, I, R2, I2);

^

Complextest.java [34:1] cannot resolve symbol

symbol : variable Complex

location: class Complextest

Complex.add(real, imag, real2, imag2);

^

Complextest.java [35:1] cannot resolve symbol

symbol : variable Complex

location: class Complextest

Complex.subtract(real, imag, real2, imag2);

^

Complextest.java [36:1] cannot resolve symbol

symbol : variable Complex

location: class Complextest

Complex.printComplex(real, imag, real2, imag2);

^

5 errors

Errors compiling Complextest.

Thanks for the help.