Question

I have a single validation class which has various validate methods. like

public class GlobalValidationClass {

public void validatefields(String s) {
//My Work here
}

In methods of other classes, I create an instance of the above class and then call the validatefields method.

Like

public class FirstClass {

public void firstPage() {
    GlobalValidationClass fp = new GlobalValidationClass();
    fp.validatefields("first page");
}

public void secondPage() {
    GlobalValidationClass sp = new GlobalValidationClass();
    sp.validatefields("second page");
}

My question is will it increase performance if I make the methods in my validation class static? Or it wont as the java’s garbage collector will garbage collect the objects at the end of each method and there wont be any performance impact if I am following the approach of creating instance of classes in every method?

Answer 1

It will help performance to use static methods, because you won’t have to create objects or garbage collect them.

When there are only static methods on a class, it is called a utility class. Typically, you give it a private constructor too, to emphasize that you shouldn’t create an instance.

There is another option: You could refactor your client class to minimize creation/destruction by reusing the validator:

public class FirstClass {
    // Create the validator once per client instance, 
    // instead of once per method call
    private GlobalValidationClass fp = new GlobalValidationClass();

    public void firstPage() {
        fp.validatefields("first page");
    }

    public void secondPage() {
        sp.validatefields("second page");
    }