How do I make a constructor to set the length of a global array?
I have already tried several ways to do it, none successful.
Example:
public Class{
public Class(int length){
double[] array = new double[length]; <- this is not global
L = length;
}
int L;
double[] array = new double[L]; <- this does not work
}
I need an array with a length determined by Constructor.
I think it's as simple as this:
public class MyClass{
double[] array;
public MyClass(int length){
array = new double[length];
}
}
I've also made the code actually compile :) You were missing some keywords etc.
If you want to access length in your code, use array.length rather than storing it redundantly in a separate field.
Also calling your class Class is a bad choice, even as an example, because it clashes with java.lang.Class.
Declare the array as member variable. Then initialize it in the constructor.
public class A{
private double[] array;
public Class(int length){
array = new double[length];
L = length;
}
}
You could initialize it in second way. But then you need to use a fixed length
public class A{
private double[] array = new double[100]; // use fixed length
public Class(int length){
array = new double[length];
L = length;
}
}
I don't know what you are trying to achieve but why you don't simply do it this way:
public class Class{
public Class(int length){
this.array = new double[length]; // <- this is not global
}
double[] array;
}
public class aClass{
//define the variable name here, but wait to initialize it in the constructor
public double[] array;
public aClass(int length){
array = new double[length];
}
}
You can do it
public class Test {
double[] array;
public Test (int length){
array = new double[length]; <- this is not global
}
class here and also the choice of Class as classname is incorrect as it clashes with java.lang.Class !
double[] arrayoutside of the constructor and then creating the objectarray = new double[length];inside the constructor?