Java 简单实例变量问题
我正在做一个涉及椭圆曲线的小型个人项目,我对曲线的实例变量有点困难。在main方法中正确打印变量,但print方法始终返回每个变量等于0的值。有人想办法解决这个问题吗?请容忍我,我知道这是一个相当小的问题Java 简单实例变量问题,java,instance-variables,Java,Instance Variables,我正在做一个涉及椭圆曲线的小型个人项目,我对曲线的实例变量有点困难。在main方法中正确打印变量,但print方法始终返回每个变量等于0的值。有人想办法解决这个问题吗?请容忍我,我知道这是一个相当小的问题 public class ellipticcurve { public int A, B, p; public ellipticcurve(int A, int B, int p) { A = this.A; B = this.B; p = this.p; /
public class ellipticcurve {
public int A, B, p;
public ellipticcurve(int A, int B, int p) {
A = this.A;
B = this.B;
p = this.p;
// E:= Y^2 = X^3 + AX + B
}
public static boolean isAllowed(int a, int b, int p) {
return ((4*(Math.pow(a, 3)) + 27*(Math.pow(b, 2)))%p != 0);
}
public static void printCurve(ellipticcurve E) {
System.out.println("E(F" + E.p + ") := Y^2 = X^3 + " + E.A + "X + " + E.B + ".");
}
public static void main(String[] args) {
ArgsProcessor ap = new ArgsProcessor(args);
int a = ap.nextInt("A-value:");
int b = ap.nextInt("B-value:");
int p = ap.nextInt("Prime number p for the field Fp over which the curve is defined:");
while (isAllowed(a, b, p) == false) {
System.out.println("The parameters you have entered do not satisfy the "
+ "congruence 4A^3 + 27B^2 != 0 modulo p.");
a = ap.nextInt("Choose a new A-value:");
b = ap.nextInt("Choose a new B-value:");
p = ap.nextInt("Choose a new prime number p for the field Fp over which the curve is defined:");
}
ellipticcurve curve = new ellipticcurve(a, b, p);
System.out.println(curve.A + " " + curve.B + " " + curve.p);
printCurve(curve);
System.out.println("The elliptic curve is given by E(F" + p
+ ") := Y^2 = X^3 + " + a + "X + " + b + ".");
}
在构造函数中,它应该是这样的
public ellipticcurve(int A, int B, int p) {
this.A = A;
this.B = B;
this.p = p;
// E:= Y^2 = X^3 + AX + B
}
而不是
public ellipticcurve(int A, int B, int p) {
A = this.A;
B = this.B;
p = this.p;
// E:= Y^2 = X^3 + AX + B
}
您正在将实例变量分配给构造函数中传递的变量,因此实例变量将被初始化为构造函数中的默认值
public ellipticcurve(int A, int B, int p) {
this.A = A;
this.B = B;
this.p = p;
// E:= Y^2 = X^3 + AX + B
}
而不是
public ellipticcurve(int A, int B, int p) {
A = this.A;
B = this.B;
p = this.p;
// E:= Y^2 = X^3 + AX + B
}
您正在将实例变量分配给在构造函数中传递的变量,以便将实例变量初始化为其默认值