Here's a simple example of how you can achieve this:
Let's say you have a class FirstClass with a method to fill up an array with double values:
public class FirstClass {
private double[] values;
public void fillArray(int size) {
values = new double[size];
// Code to fill up the array with double values goes here
}
public double[] getValues() {
return values;
}
}
And you want to use these double values in another class SecondClass:
public class SecondClass {
private double[] secondValues;
public SecondClass(FirstClass first) {
double[] firstValues = first.getValues();
// Copy the values from the first class to the second class
secondValues = new double[firstValues.length];
System.arraycopy(firstValues, 0, secondValues, 0, firstValues.length);
}
// Now you can use the secondValues array in this class
// For example, you can iterate through the values and subtract them from a total
}
In this example, the SecondClass constructor takes an instance of FirstClass as a parameter. It then calls the getValues() method of FirstClass to retrieve the array of double values. Using System.arraycopy(), it copies these values into a new array secondValues in SecondClass, which you can then use as needed.
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