It's not strange, it's its normal behaviour. Constructor does not have a return type
public Test() {
System.out.println("constructor");
}
is a constructor, but
public void Test() {
System.out.println("constructor");
}
is a simple method that you can call using t1.Test().
This page lists the differences between constructors and methods:
1) First difference between method vs constructor in Java is that name of constructor must be same with name of the Class but there is no such requirement for method in Java. methods can have any arbitrary name in Java.
2) Second difference between method and constructor in Java is that constructor doesn't have any return type but method has return type and return something unless its void.
3) Third difference between constructor and method in Java is that Constructors are chained and they are called in a particular order, there is no such facility for methods.
4) Unlike method, constructor, yet declared in class doesn't considered as member of Class. Constructors are not inherited by child classes but methods are inherited by child classes until they are made private. on which case they are only visible in class on which they are declared. Similarly private constructor means you can not create object of that class from outside, this is one of the technique used to implement Singleton pattern in Java.
5) Another difference between method and constructor in Java is that special keyword this and super is used to call constructor explicitly. no such thing for method, they have there own name which can be used to call them.
