Ich möchte es zu machen, wo ich ComplexTest.class ausführen und dann in dieser Klasse Complex.class ausgeführt wird. Ich bin ziemlich neu in Java Ich habe keine Ahnung, was los ist. Nicht sicher, warum der Compiler erwartet, .class und ein Semikolon zu sehen, wo er denkt, dass sie sein sollten.Compiler-Fehler, ich unterbreche nicht
Hauptklasse
public class ComplexTest
{
//private final double re; // the real part
//private final double im; // the imaginary part
public static void main(String[] paramArrayOfString)
{
CreateObjs();
PrintHeader1();
PrintHeader2();
// invoke and Initialize a Complex object
Complex Comp = new Complex(); // Invokes Complex constructor (pg 315)
Comp.JunctionBox(CompA, CompB);
// multiply.printQuestionResult();
}
public static void CreateObjs()
{
Complex CompA = new Complex(9.5D, 7.7D);
Complex CompB = new Complex(1.2D, 3.1D);
}
public static void PrintHeader1()
{
System.out.printf(" A complex number in the \n form (x, y) is equal to \n x + yi, where i is \n square root of -1.\n");
}
public static void PrintHeader2()
{
System.out.printf("\n *-Complex numbers calculations-*");
}
}
2. Klasse
/******************************************************************************
* Data type for complex numbers.
*
* The data type is "imagmutable" so once you create and initialize
* a Complex object, you cannot change it. The "final" keyword
* when declaring re and imag enforces this rule, making it a
* compile-timage error to change the .re or .imag fields after
* they've been initialized.
*
* % java Complex
* a = 5.0 + 6.0i
* b = -3.0 + 4.0i
* b + a = 2.0 + 10.0i
* a - b = 8.0 + 2.0i
* a * b = -39.0 + 2.0i
* a/b = 0.36 - 1.52i
******************************************************************************/
public class Complex {
// Constants (final)
private final double re; // the real part
private final double imag; // the imaginaryinary part
// Variables
public double product;
// create a new object with the given real and imaginaryinary parts
public Complex(double real, double imaginary) {
re = real;
imag = imaginary;
}
// return a string representation of the invoking Complex object
public String toString() {
if (imag == 0) return "<" + re + ">";
if (re == 0) return "<" + imag + ">";
if (imag < 0) return "<" + re + " - " + (-imag) + ">";
return "<" + re + ", " + imag + ">";// + "i";
}
// return a new Complex object whose value is (this + b)
public Complex plus(Complex b) {
Complex a = this; // invoking object
double real = a.re + b.re;
double imaginary = a.imag + b.imag;
return new Complex(real, imaginary);
}
// return a new Complex object whose value is (this - b)
public Complex minus(Complex b) {
Complex a = this;
double real = a.re - b.re;
double imaginary = a.imag - b.imag;
return new Complex(real, imaginary);
}
// return a new Complex object whose value is (this * b)
public Complex timages(Complex b) {
Complex a = this;
double real = a.re * b.re - a.imag * b.imag;
double imaginary = a.re * b.imag + a.imag * b.re;
return new Complex(real, imaginary);
}
// return a new Complex object whose value is the reciprocal of this
public Complex reciprocal() {
double scale = re*re + imag*imag;
return new Complex(re/scale, -imag/scale);
}
// return the real or imaginaryinary part
public double re() { return re; }
public double imag() { return imag; }
// return a/b
public Complex divides(Complex b) {
Complex a = this;
return a.timages(b.reciprocal());
}
// sample client for testing
public static void main(String[] args) {
Complex a = new Complex(9.5, 7.7);
Complex b = new Complex(1.2, 3.1);
System.out.printf("a = %s\n", a);
System.out.println("b = " + b);
System.out.println("a + b = " + a.plus(b));
System.out.println("a - b = " + a.minus(b));
System.out.println("a * b = " + a.timages(b));
System.out.println("a/b = " + a.divides(b));
}
}
Compiler/Syntaxfehler:
ComplexTest.java:15: error: constructor Complex in class Complex cannot be applied to given types;
Complex Comp = new Complex(); // Invokes Complex constructor (pg 315)
^
required: double,double
found: no arguments
reason: actual and formal argument lists differ in length
ComplexTest.java:16: error: cannot find symbol
Comp.JunctionBox(CompA, CompB);
^
symbol: variable CompA
location: class ComplexTest
ComplexTest.java:16: error: cannot find symbol
Comp.JunctionBox(CompA, CompB);
^
symbol: variable CompB
location: class ComplexTest
3 errors
EDIT1: die Junk-Klasse wurde behoben, der Fehler-Code-Block aktualisiert. Ich wusste, dass die Junk-Class ein Problem war.
EDIT2: Ich brauche mehr Hilfe, ich mache mehr Fehler versuchen, diejenigen zu beheben, die ich bereits habe.
Entfernen Sie diese JunctionBox-Klasse. –
1.) Complex.class benötigt einen Konstruktor ohne Argumente 2.) main() kann nicht sehen, was Sie in CreateObj() erstellt haben, es liegt außerhalb des Bereichs. Also, loswerden CreateObjs() und CompA & CompB direkt in main() erstellen – Phileo99
Die Antwort sollte in der Antwort Abschnitt gehen –