Java Method with Enforced Array Size Parameters?

Question

I would like to create an initialisation method for a Java class that accepts 3 parameters:

Employee[] method( String[] employeeNames, Integer[] employeeAges         


        

Answer 1

A way to skirt around the problem is to create a builder, e.g., EmployeeArrayBuilder,

public class EmployeeArrayBuilder {
   private Integer arraySize = null;
   private String[] employeeNames;
   public EmployeeArrayBuilder addName(String[] employeeNames) {
      if (arraySize == null) {
         arraySize = employeeNames.length;
      } else if (arraySize != employeeNames.length) {
         throw new IllegalArgumentException("employeeNames needs to be " + arraySize + " in length");
      }
      this.employeeNames = employeeNames;
      return this;
   }
   public EmployeeArrayBuilder addSalaries(float[] employeeSalaries) {/* similar to above */}
   public EmployeeArrayBuilder addAges(Integer[] employeeAges) {/* similar  */}
   public Employee[] build() {
       // here, you can do what you needed to do in the constructor in question, and be sure that the members are correctly sized.
       Employee myEmployees[] = new Employee[arraySize ];// dont know what size is            
       for ( int count = 0; count < arraySize ; count++) {
            myEmployees[count] = new Employee( employeeNames[count], employeeAges[count], employeeSalaries[count] );
       }
       return myEmployees;
   }
}