What is parameter signature in Java?

Method signatures are basically rarely said in Java.

Probably refers to the access permissions of the method, the return value of the method, the method name and the parameter list.

private double doAdd(double d1, double d2){

return d1 d2;

}

private refers to the method Access permissions

double refers to the return value of the method

doAdd is the name of the method

double d1, double d2 is the parameter list of the method