I created a function that I want to use in LWC, but when i first tested it the result was a ObjectObject. So i tried to test the function through Develper Console. So here is my function

public class Plan {
    public static string Plan(String jobName, String d, String scheduleName) {
       String jobId;
       Type scheduleClass = Type.forName(scheduleName);
       if (scheduleClass != null) {
           Schedulable m = (Schedulable) scheduleClass.newInstance();
            jobId = system.schedule(jobName, d, m);
       return jobId;

I tried using these for execution in the terminal

Plan A=new Plan('Test','0 0 13 * *  ?','PlanTest');

But I got an error Constructer not defined

  • You should not be able to save the class, it wd give compile time error Commented Jul 12, 2019 at 8:43
  • @PranayJaiswal Well i'm able to save it. Commented Jul 12, 2019 at 8:44
  • 2
    try, String jobId - Plan.plan('Test','0 0 13 * * ?','PlanTest'); Commented Jul 12, 2019 at 8:45
  • In my knowledge, Constructor is never static and never has a return type, the fact that you can make static constuctor with return type, amazes me, it looks like its not a constuctor, but just a normal static method? Commented Jul 12, 2019 at 8:49
  • Aha got the reason, :) stackoverflow.com/questions/18480867/… Commented Jul 12, 2019 at 8:50

1 Answer 1


You are getting that error because you have not defined a parameterized constructor for class Plan.

What you have created in your class is a static method and not Constructor.

Excerpt from Using Constructors document.

The syntax for a constructor is similar to a method, but it differs from a method definition in that it never has an explicit return type and it is not inherited by the object created from it.

In your case, you have defined a static method with the same name as class name which is allowed but not recommended.

So this is how constructors should be defined

public class Plan {
    // The no argument constructor 
    public Plan() {
        // more code here

    // The parameterized constructor 
    public Plan(String jobName, String d, String scheduleName) {
        // more code here

So when you want to execute your code, you should use

Plan.Plan('Test','0 0 13 * *  ?','PlanTest'); //calling static method

instead of

Plan A=new Plan('Test','0 0 13 * *  ?','PlanTest'); 
//this code will check for parameterized constructor which is not present, hence error would be thrown

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